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eldersptgt
Cruiser Expert

Posted: Oct 6, 2007, 12:33 AM
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Noise on hard acceleration
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Ok so i know i am weird and my PT had a strange noise before but when i am accelerating to get on the freeway for instance i hear a what sounds to me like rod slap at certain RPM's in all gears 1,2,3 not 4. its like the rods are knocking into each other or are rattling from harmonics w/ in the block. I Have always heard it but i have always wondered what it was. Any one else have a noise or i am just crazy and paranoid about my car. ---------- 04 "SRT-4" PT Cruiser w/ AutoStick (in Sea Mist Green, 1 of 146) Stage 1, Mopar BOV, MagnaFlow 2 1/2 cat back exhaust, MSD black 8.5mm wires, Stock Champion Plugs gapped at .035, S&B Cold air intake, H&R sport springs, Progress 27mm front sway bar, Energy Suspension motor mount inserts, 06' tail lights, 06' Hood emblem, T-handle on rear glass, SRT-4 badges, factory chrome accent group, chrome door cups, 8" Mopar sub, ClearBra. 205/50ZR17 Sumitomo HTRIII tires
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Posts: 343 | From: El Dorado Hils, Ca
| Registered: Jun 15, 2007, 6:33 AM
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rsobhian
Cruiser Expert

Posted: Oct 6, 2007, 9:18 AM
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Re: [eldersptgt] Noise on hard acceleration
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It's hard to tell not being there and hearing the noise firsthand, but worn rod bearings could cause symptoms similar to what you are describing. One thing is for sure, rods cannot be "knocking into each other ". Each one is "individually packed" in its own cylinder. ---------- 2001 silver Limited-Touring (leather/suede, 4W disk, traction, heated mirrors & all :-) Mods: Tokico HP all around / Energy Suspension Master Kit / K&N drop-in / R1 Concepts drilled & slotte disks all around / Enkei RPF1 16x7 wheels & Conti Extreme Contact rubber / Prestige APS620 remote starter
(This post was edited by rsobhian on Oct 6, 2007, 9:20 AM)
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Posts: 425 | From: MA
| Registered: Aug 2, 2007, 7:47 PM
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Bluephrog
Cruiser Addict

Posted: Oct 6, 2007, 10:37 AM
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Re: [eldersptgt] Noise on hard acceleration
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Sounds like detonation, what Octane gas are you using? ----------
(This post was edited by Bluephrog on Oct 6, 2007, 10:39 AM)
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Posts: 665 | From: Vermont
| Registered: May 24, 2003, 5:25 PM
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eldersptgt
Cruiser Expert

Posted: Oct 6, 2007, 6:45 PM
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Re: [Bluephrog] Noise on hard acceleration
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That is what i was thinking as well but i always use 91 octane (CA) and from Shell or Chevron so i don't know. ---------- 04 "SRT-4" PT Cruiser w/ AutoStick (in Sea Mist Green, 1 of 146) Stage 1, Mopar BOV, MagnaFlow 2 1/2 cat back exhaust, MSD black 8.5mm wires, Stock Champion Plugs gapped at .035, S&B Cold air intake, H&R sport springs, Progress 27mm front sway bar, Energy Suspension motor mount inserts, 06' tail lights, 06' Hood emblem, T-handle on rear glass, SRT-4 badges, factory chrome accent group, chrome door cups, 8" Mopar sub, ClearBra. 205/50ZR17 Sumitomo HTRIII tires
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Posts: 343 | From: El Dorado Hils, Ca
| Registered: Jun 15, 2007, 6:33 AM
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eldersptgt
Cruiser Expert

Posted: Oct 6, 2007, 6:47 PM
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Re: [rsobhian] Noise on hard acceleration
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I wonder if it could be the rod slapping the crank journal then? Maybe ill get a free motor out of it? yea right. well i just keep putting in my Mobil 1 and hope nothing goes wrong thanks. ---------- 04 "SRT-4" PT Cruiser w/ AutoStick (in Sea Mist Green, 1 of 146) Stage 1, Mopar BOV, MagnaFlow 2 1/2 cat back exhaust, MSD black 8.5mm wires, Stock Champion Plugs gapped at .035, S&B Cold air intake, H&R sport springs, Progress 27mm front sway bar, Energy Suspension motor mount inserts, 06' tail lights, 06' Hood emblem, T-handle on rear glass, SRT-4 badges, factory chrome accent group, chrome door cups, 8" Mopar sub, ClearBra. 205/50ZR17 Sumitomo HTRIII tires
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Posts: 343 | From: El Dorado Hils, Ca
| Registered: Jun 15, 2007, 6:33 AM
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rsobhian
Cruiser Expert

Posted: Oct 6, 2007, 7:29 PM
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Re: [eldersptgt] Noise on hard acceleration
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Quote: I wonder if it could be the rod slapping the crank journal then? Maybe ill get a free motor out of it? yea right. well i just keep putting in my Mobil 1 and hope nothing goes wrong thanks. Does it sound like detonation? If the sound is like what you'd get with lower octane gas, since you're using 91 octane and you're OK on that front, then you could be having an issue with your timing being too advanced. There are various things that could cause that. So the question is where exactly is the noise coming from and what does it sound like? If you listen to the noise carefully you should be able to tell if it sounds like it's coming from the bottom of the engine (bad rod bearing...) or if it's the higher up pinging, piston rattling (low octane, advanced timing...). Also the bad bearing sound is much more subtle initially - i.e., when the bearings first start to go bad. Of course it does get progressively worse and louder over time. ---------- 2001 silver Limited-Touring (leather/suede, 4W disk, traction, heated mirrors & all :-) Mods: Tokico HP all around / Energy Suspension Master Kit / K&N drop-in / R1 Concepts drilled & slotte disks all around / Enkei RPF1 16x7 wheels & Conti Extreme Contact rubber / Prestige APS620 remote starter
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Posts: 425 | From: MA
| Registered: Aug 2, 2007, 7:47 PM
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eldersptgt
Cruiser Expert

Posted: Oct 6, 2007, 8:29 PM
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Re: [rsobhian] Noise on hard acceleration
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Does it sound like detonation? If the sound is like what you'd get with lower octane gas, since you're using 91 octane and you're OK on that front, then you could be having an issue with your timing being too advanced. There are various things that could cause that. So the question is where exactly is the noise coming from and what does it sound like? If you listen to the noise carefully you should be able to tell if it sounds like it's coming from the bottom of the engine (bad rod bearing...) or if it's the higher up pinging, piston rattling (low octane, advanced timing...). Also the bad bearing sound is much more subtle initially - i.e., when the bearings first start to go bad. Of course it does get progressively worse and louder over time.
I dont know. I really think it is a rod/crank issue. it only happens when i am hard on the gas. I took teh stage 1 off today to see if it is any different and it got better but it is still there. I guess it could be Fuel. but it sound to much like buried metal parts touching at high speed. its sounds like the light clacking or popping noise of pop rocks only w/ metal. I wonder if it is my plugs? ---------- 04 "SRT-4" PT Cruiser w/ AutoStick (in Sea Mist Green, 1 of 146) Stage 1, Mopar BOV, MagnaFlow 2 1/2 cat back exhaust, MSD black 8.5mm wires, Stock Champion Plugs gapped at .035, S&B Cold air intake, H&R sport springs, Progress 27mm front sway bar, Energy Suspension motor mount inserts, 06' tail lights, 06' Hood emblem, T-handle on rear glass, SRT-4 badges, factory chrome accent group, chrome door cups, 8" Mopar sub, ClearBra. 205/50ZR17 Sumitomo HTRIII tires
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Posts: 343 | From: El Dorado Hils, Ca
| Registered: Jun 15, 2007, 6:33 AM
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madkat
Cruiser Fan

Posted: Oct 6, 2007, 9:20 PM
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Re: [eldersptgt] Noise on hard acceleration
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I had that happen for a VERY Short period of time, but it went away after a tank of gas went through it (it was a bad tank, I keep getting bad tanks, but it might be because I'm not using the same brand (since it was purchased, it only used Mobil, Shell, or BP Gas. Since I keep going station hopping depending on fuel prices, it might just be a different brand has a lower octane than what it says.) At Auto Zone, theres a display for an "Octane booster" thats $1.99 per bottle. the links are http://tinyurl.com/3999r8 Fuel System Cleaner and http://tinyurl.com/3dn67d for the Octane booster. Their right next to each other in Auto Zone by the check out. Putting a bottle in each totally gets rid of any bad gas that I get, and even if I get Mobil, BP, or Shell, I still put in a bottle and it runs a little better (it doesn't hesitate whenever I only hit the gas a little) Try a bottle of that and see if it goes away. ---------- 2003 GT Cruiser Fully Loaded Borla Dual Exhaust K&N Drop In filter Viper Remote Start/ Keyless entry
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Posts: 46 | From: Chicago
| Registered: Jun 4, 2006, 7:35 PM
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rsobhian
Cruiser Expert

Posted: Oct 7, 2007, 6:56 AM
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Re: [eldersptgt] Noise on hard acceleration
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...it sound to much like buried metal parts touching at high speed. its sounds like the light clacking or popping noise of pop rocks only w/ metal. I wonder if it is my plugs? Your description really sounds like a rod bearing issue. The bearings sit between the rods and crank journals and are made of softer materials (I think lead in general) to act as a cushion while keeping everything tight. So the rod itself never comes in direct contact with the crank. When the bearings wear, a little play develops and the rods start to rattle. With the bad gas / timing issues when the pinging sound starts to develop you feel a loss of power and the pinging does not go away. The bad bearing sound I remember comes at a certain RPM range and does not seem to affect the performance of the engine. So the engine will rev up smoothly and all else seems to be OK. Of course, that problem should not be ignored. Eventually it will damage the crank. I'm not sure about your comment about the plugs being the cause. Are you saying you think the plugs are too "hot" or something? If you think it's a gap issue you can always check that easily. In general it is a good idea to eliminate simple potential causes first. All that said, again I have to emphasize that it's really hard to tell from clear across the country. I'm not sure if it was on this site or another forum that someone got upset because they had pulled the bottom of the engine looking for problems based on advice from the forum and they had not found any issues. So I am in no way guaranteeing that bad bearings are really the issue, but that's one likely cause and assuming the simple stuff are out (gas, spark...), it's what sounds to me to be the issue based on your description. Good luck with it in any case. ---------- 2001 silver Limited-Touring (leather/suede, 4W disk, traction, heated mirrors & all :-) Mods: Tokico HP all around / Energy Suspension Master Kit / K&N drop-in / R1 Concepts drilled & slotte disks all around / Enkei RPF1 16x7 wheels & Conti Extreme Contact rubber / Prestige APS620 remote starter
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Posts: 425 | From: MA
| Registered: Aug 2, 2007, 7:47 PM
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Bluephrog
Cruiser Addict

Posted: Oct 7, 2007, 4:13 PM
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Re: [eldersptgt] Noise on hard acceleration
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I use 93 octane and I would still get "pinging". To stop it completely took a colder Sparkplug. I could also get rid of it with a bottle of octane booster. Not all gas is what you think, I would try a tank of Sunoco 93 if you can get it or Mobil to see. Poor gas is very common especially now that we buy that too from over seas. I don't think it is a rod bearing as you would be able to duplicate it by just gunning the engine. A rod knock is LOUD and sounds like you are hitting a hammer on a hard piece of wood. ----------
(This post was edited by Bluephrog on Oct 7, 2007, 4:22 PM)
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Posts: 665 | From: Vermont
| Registered: May 24, 2003, 5:25 PM
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eldersptgt
Cruiser Expert

Posted: Oct 7, 2007, 6:18 PM
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Re: [madkat] Noise on hard acceleration
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I run Lucas oil octane boost already. Makes the same noise. and it happens hot or cold. ---------- 04 "SRT-4" PT Cruiser w/ AutoStick (in Sea Mist Green, 1 of 146) Stage 1, Mopar BOV, MagnaFlow 2 1/2 cat back exhaust, MSD black 8.5mm wires, Stock Champion Plugs gapped at .035, S&B Cold air intake, H&R sport springs, Progress 27mm front sway bar, Energy Suspension motor mount inserts, 06' tail lights, 06' Hood emblem, T-handle on rear glass, SRT-4 badges, factory chrome accent group, chrome door cups, 8" Mopar sub, ClearBra. 205/50ZR17 Sumitomo HTRIII tires
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Posts: 343 | From: El Dorado Hils, Ca
| Registered: Jun 15, 2007, 6:33 AM
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eldersptgt
Cruiser Expert

Posted: Oct 7, 2007, 6:21 PM
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Re: [rsobhian] Noise on hard acceleration
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I think that it what it is as well. i am listening for it more and more now. i now when it is going to happen and i am going to jsut wait until it gets worse. if it changes at all. Ill check to filter and oil in 2k when teh oil is due. ---------- 04 "SRT-4" PT Cruiser w/ AutoStick (in Sea Mist Green, 1 of 146) Stage 1, Mopar BOV, MagnaFlow 2 1/2 cat back exhaust, MSD black 8.5mm wires, Stock Champion Plugs gapped at .035, S&B Cold air intake, H&R sport springs, Progress 27mm front sway bar, Energy Suspension motor mount inserts, 06' tail lights, 06' Hood emblem, T-handle on rear glass, SRT-4 badges, factory chrome accent group, chrome door cups, 8" Mopar sub, ClearBra. 205/50ZR17 Sumitomo HTRIII tires
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Posts: 343 | From: El Dorado Hils, Ca
| Registered: Jun 15, 2007, 6:33 AM
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eldersptgt
Cruiser Expert

Posted: Oct 7, 2007, 6:24 PM
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Re: [Bluephrog] Noise on hard acceleration
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Dont know. no Mobil or Sunoco stations in Ca that i know of. Ill keep an eye out and i am going to see if the stock copper plugs make a difference ---------- 04 "SRT-4" PT Cruiser w/ AutoStick (in Sea Mist Green, 1 of 146) Stage 1, Mopar BOV, MagnaFlow 2 1/2 cat back exhaust, MSD black 8.5mm wires, Stock Champion Plugs gapped at .035, S&B Cold air intake, H&R sport springs, Progress 27mm front sway bar, Energy Suspension motor mount inserts, 06' tail lights, 06' Hood emblem, T-handle on rear glass, SRT-4 badges, factory chrome accent group, chrome door cups, 8" Mopar sub, ClearBra. 205/50ZR17 Sumitomo HTRIII tires
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Posts: 343 | From: El Dorado Hils, Ca
| Registered: Jun 15, 2007, 6:33 AM
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Cruzer Bug
Cruiser Buff

Posted: Oct 9, 2007, 2:50 PM
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Re: [eldersptgt] Noise on hard acceleration
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What RPM did you reach when you noticed the noise? I took off once and just above the max RPM, I got a loud sputter (like a phwitttt, phwitttt, phwittt in rapid succession) that rather startled me - my wife asked if I broke it. But alas, I suspect it was some sort of electronic governor that kicked in to keep it from exceeding the max. RPMs. Was that a correct assumption? ---------- Top Down better than Bottoms Up
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Posts: 77 | From: Destin, FL
| Registered: Mar 25, 2007, 11:51 AM
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rsobhian
Cruiser Expert

Posted: Oct 9, 2007, 3:37 PM
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Re: [Cruzer Bug] Noise on hard acceleration
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Sounds like it. I think it's a good thing, so I'm not sure why the "alas."
---------- 2001 silver Limited-Touring (leather/suede, 4W disk, traction, heated mirrors & all :-) Mods: Tokico HP all around / Energy Suspension Master Kit / K&N drop-in / R1 Concepts drilled & slotte disks all around / Enkei RPF1 16x7 wheels & Conti Extreme Contact rubber / Prestige APS620 remote starter
(This post was edited by rsobhian on Oct 9, 2007, 3:38 PM)
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Posts: 425 | From: MA
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Cruzer Bug
Cruiser Buff

Posted: Oct 9, 2007, 6:08 PM
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Re: [rsobhian] Noise on hard acceleration
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Rhymes with "saved my ---." (butt). ---------- Top Down better than Bottoms Up
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Posts: 77 | From: Destin, FL
| Registered: Mar 25, 2007, 11:51 AM
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rsobhian
Cruiser Expert

Posted: Oct 9, 2007, 6:32 PM
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Re: [Cruzer Bug] Noise on hard acceleration
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---------- 2001 silver Limited-Touring (leather/suede, 4W disk, traction, heated mirrors & all :-) Mods: Tokico HP all around / Energy Suspension Master Kit / K&N drop-in / R1 Concepts drilled & slotte disks all around / Enkei RPF1 16x7 wheels & Conti Extreme Contact rubber / Prestige APS620 remote starter
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Posts: 425 | From: MA
| Registered: Aug 2, 2007, 7:47 PM
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eldersptgt
Cruiser Expert

Posted: Oct 9, 2007, 6:34 PM
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Re: [Cruzer Bug] Noise on hard acceleration
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No the noise only happens under low rpms. >3000 right around 2100 to 2900 under acceleration only. and its a ticking/ratting noise like the finger snaps you get at 4th of july only a duller sound ---------- 04 "SRT-4" PT Cruiser w/ AutoStick (in Sea Mist Green, 1 of 146) Stage 1, Mopar BOV, MagnaFlow 2 1/2 cat back exhaust, MSD black 8.5mm wires, Stock Champion Plugs gapped at .035, S&B Cold air intake, H&R sport springs, Progress 27mm front sway bar, Energy Suspension motor mount inserts, 06' tail lights, 06' Hood emblem, T-handle on rear glass, SRT-4 badges, factory chrome accent group, chrome door cups, 8" Mopar sub, ClearBra. 205/50ZR17 Sumitomo HTRIII tires
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Posts: 343 | From: El Dorado Hils, Ca
| Registered: Jun 15, 2007, 6:33 AM
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Cruzer Bug
Cruiser Buff

Posted: Oct 9, 2007, 6:40 PM
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Re: [eldersptgt] Noise on hard acceleration
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Sounds like good ol' fashioned "pinging" or ignition knock; either bad gas or bad timing. Either GasX or a new watch is in order. If it's replicable, could a trusted mechanic diagnose it? ---------- Top Down better than Bottoms Up
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Posts: 77 | From: Destin, FL
| Registered: Mar 25, 2007, 11:51 AM
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eldersptgt
Cruiser Expert

Posted: Oct 9, 2007, 6:58 PM
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Re: [Cruzer Bug] Noise on hard acceleration
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I am using Lucas oil fuel treatment now. I am going to change out my plugs this weekend. Try the stock coppers again. see if that changes any thing. ---------- 04 "SRT-4" PT Cruiser w/ AutoStick (in Sea Mist Green, 1 of 146) Stage 1, Mopar BOV, MagnaFlow 2 1/2 cat back exhaust, MSD black 8.5mm wires, Stock Champion Plugs gapped at .035, S&B Cold air intake, H&R sport springs, Progress 27mm front sway bar, Energy Suspension motor mount inserts, 06' tail lights, 06' Hood emblem, T-handle on rear glass, SRT-4 badges, factory chrome accent group, chrome door cups, 8" Mopar sub, ClearBra. 205/50ZR17 Sumitomo HTRIII tires
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Posts: 343 | From: El Dorado Hils, Ca
| Registered: Jun 15, 2007, 6:33 AM
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Bluephrog
Cruiser Addict

Posted: Oct 10, 2007, 5:19 AM
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Re: [Cruzer Bug] Noise on hard acceleration
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Only if they are using Chinese made diagnostic equipment. ----------
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Posts: 665 | From: Vermont
| Registered: May 24, 2003, 5:25 PM
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DreamSicle
Cruiser Fan

Posted: Oct 15, 2007, 8:49 AM
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Re: [eldersptgt] Noise on hard acceleration
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Hi, Have you gone thur more then one tank of gas? Maybe you paid for Premium and got Reg. They had the wrong fuel in the tanks?????or water in the gas ????? Another thought comes to my mind that could cause detonate Pinging if that is the problem? Would be a TOO LEAN of fuel mixture. I would think the Computer would detect this ? But I would think that could be caused by a restricted fuel filter, poor fuel pump, or dirty injectors. Where is the Fuel filter on a PT ? The last one I changed was on My daughter's 91 Lebaron Convert, With 3 liter V6. And it had a fuel filter back by the gas tank on the frame rail. My thought If a COUPLE tanks of gas (All the way to EMPTY then to Full ). ( Wouldn't it be GREAT if they had a easy way to drain the tank ) And maybe a Fuel Filter change doesn't fix it. Then it's best to go to a dealer. Just got back from looking up Fuel filter on PT at Autozone and it looks as thou, it's inside the fuel tank. Goodluck , Keep us unto date what you find. Walt PS. Was in Wisconsin over the last weekend on the Wisconsin Badger's PT " Cruise the Mississippi " and saw a twin to your car , A SeaMist Green Turbo........ ---------- Our Little Dreamsicle ...... 2003 DreamCruiser #2 serial # 2115 2001 Neon ES 1991 Chrysler Lebaron GTC Coupe 2.5 Turbo
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Posts: 20 | From: Chicago, IL
| Registered: Apr 27, 2007, 5:19 AM
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eldersptgt
Cruiser Expert

Posted: Oct 15, 2007, 9:29 PM
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Re: [DreamSicle] Noise on hard acceleration
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Changed the oil and added a bottle of ProLong to my Mobil 1. What ever noise it is has gotten much quieter since the prolong. I also got gas from cost-co just too see what would happen and no more noise all together so far. I will be changing my spark plugs next back to stock if need be. Sea mist green out east... i was going to buy another sea mist green one in San Fran. a 5 speed GT no less in sea mist. I wonder how of those exist. since only 146 sea mist cars were ever built. ---------- 04 "SRT-4" PT Cruiser w/ AutoStick (in Sea Mist Green, 1 of 146) Stage 1, Mopar BOV, MagnaFlow 2 1/2 cat back exhaust, MSD black 8.5mm wires, Stock Champion Plugs gapped at .035, S&B Cold air intake, H&R sport springs, Progress 27mm front sway bar, Energy Suspension motor mount inserts, 06' tail lights, 06' Hood emblem, T-handle on rear glass, SRT-4 badges, factory chrome accent group, chrome door cups, 8" Mopar sub, ClearBra. 205/50ZR17 Sumitomo HTRIII tires
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Posts: 343 | From: El Dorado Hils, Ca
| Registered: Jun 15, 2007, 6:33 AM
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DreamSicle
Cruiser Fan

Posted: Oct 18, 2007, 6:45 AM
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Re: [eldersptgt] Noise on hard acceleration
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What Brand of OIL FILTER are you using? Fram oil filters and all of the filters fram makes for other people are JUNK. I had problems with my Turbo Lebaron. I would notice that the longer i had my oil in. The LOWER my Idle oil pressure would be. If I DROVE it HARD , the Quicker this would happen. Change oil & Filter and it would be back up at idle to normal. I tried Different Brands of Synethic oils & Filters. Till I read about Oil Filters & the different other companys Fram makes them for. So I Switched to WIX and never had a problem Again. When I joined this club in the summer , I told someone else about this problem. I don't know which thread its under. I had some web pages to go with it. It might be a good idea , if you don't know who made the oil filter.To Buy a WIX and one quart of Mobil one. And just change the Oli Filter. I would think you wouldn't lose more oil then a quart. Most likely less then that. Remember NEVER OVER FILL !!!!!! Oil gets foamy if crankcase is over filled. Walt PS. Go online an seach minimopar.knizefamily.net then click to oil filter study I hope it helps?............... ---------- Our Little Dreamsicle ...... 2003 DreamCruiser #2 serial # 2115 2001 Neon ES 1991 Chrysler Lebaron GTC Coupe 2.5 Turbo
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Posts: 20 | From: Chicago, IL
| Registered: Apr 27, 2007, 5:19 AM
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eldersptgt
Cruiser Expert

Posted: Oct 19, 2007, 6:12 PM
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Re: [DreamSicle] Noise on hard acceleration
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i use only the mopar filters not that fram junk. I just did a full oil change new 5w40 mobil and i tried one of my surplus Toyota filters that i have and and the noise has gotten quiter since. so time will tell what happens. ---------- 04 "SRT-4" PT Cruiser w/ AutoStick (in Sea Mist Green, 1 of 146) Stage 1, Mopar BOV, MagnaFlow 2 1/2 cat back exhaust, MSD black 8.5mm wires, Stock Champion Plugs gapped at .035, S&B Cold air intake, H&R sport springs, Progress 27mm front sway bar, Energy Suspension motor mount inserts, 06' tail lights, 06' Hood emblem, T-handle on rear glass, SRT-4 badges, factory chrome accent group, chrome door cups, 8" Mopar sub, ClearBra. 205/50ZR17 Sumitomo HTRIII tires
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Posts: 343 | From: El Dorado Hils, Ca
| Registered: Jun 15, 2007, 6:33 AM
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