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Patrick78
Cruiser Buff
Posted: Jan 9, 2008, 10:15 AM
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Rough Idle after Plug Change
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I just changed my plugs to the Autolite Iridiums and I closed their factory gap from .50 to .42. The rough idle has gotten noticably better, but occassionally at a light I still feel a random spudder or can feel the car shake. Is this just the typical idle for the PT or should I close the gap a little more on the plugs? I did read on this site about some people having their plugs gapped as low as .38. What do you guys think?
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Posts: 69 | From: Woodbridge, Va.
| Registered: Dec 28, 2007, 1:44 PM
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Bluephrog
Cruiser Addict
Posted: Jan 9, 2008, 3:16 PM
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Re: [Patrick78] Rough Idle after Plug Change
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Did you replace the wires? The wires are where most of the problems come from, the OEM wires are junk.
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Posts: 667 | From: Vermont
| Registered: May 24, 2003, 5:25 PM
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Patrick78
Cruiser Buff
Posted: Jan 11, 2008, 2:49 AM
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Re: [Bluephrog] Rough Idle after Plug Change
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Yes I did replace the wires as well. I replaced them with Autolite factory replacements. They looked identical to the thickness of the factory wiring, so they weren't a performance upgrade. I really didnt' like the way the car was running so I just got what was accessible at a local store instead of ordering online and waiting for delivery.
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Posts: 69 | From: Woodbridge, Va.
| Registered: Dec 28, 2007, 1:44 PM
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Bluephrog
Cruiser Addict
Posted: Jan 11, 2008, 5:37 AM
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Re: [Patrick78] Rough Idle after Plug Change
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Plug gap seems to have an effect on idle. I run my gap at .30" and it is soooo smooth, try reducing the plug gap to .35
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Posts: 667 | From: Vermont
| Registered: May 24, 2003, 5:25 PM
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Patrick78
Cruiser Buff
Posted: Jan 11, 2008, 7:43 AM
Post #5 of 9
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Re: [Bluephrog] Rough Idle after Plug Change
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I'll give that a shot. Thanks for the advice!
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Posts: 69 | From: Woodbridge, Va.
| Registered: Dec 28, 2007, 1:44 PM
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mean green
Cruiser Addict
Posted: Jan 11, 2008, 11:39 AM
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Re: [Patrick78] Rough Idle after Plug Change
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People are gapping irridium plugs at .028-.032.
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2005 Stone White SRT4
2004 Graphite Auto
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Posts: 821 | From: Oregon
| Registered: Feb 19, 2002, 12:00 AM
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Taggert_LOA
Cruiser Expert
Posted: Jan 20, 2008, 10:20 AM
Post #7 of 9
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Re: [Patrick78] Rough Idle after Plug Change
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Quote:
I just changed my plugs to the Autolite Iridiums and I closed their factory gap from .50 to .42. The rough idle has gotten noticably better, but occassionally at a light I still feel a random spudder or can feel the car shake. Is this just the typical idle for the PT or should I close the gap a little more on the plugs? I did read on this site about some people having their plugs gapped as low as .38. What do you guys think?
the factory gap was changed to 0.40. I would gap your plugs to at least 0.35. and do yourself a favor and order performance wires. it's pointless to have perfomance plugs and oem style wires.
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Posts: 217 | From: N/A
| Registered: May 2, 2005, 9:26 PM
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mean green
Cruiser Addict
Posted: Jan 20, 2008, 1:03 PM
Post #8 of 9
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Re: [Taggert_LOA] Rough Idle after Plug Change
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Quote:
Quote:
I just changed my plugs to the Autolite Iridiums and I closed their factory gap from .50 to .42. The rough idle has gotten noticably better, but occassionally at a light I still feel a random spudder or can feel the car shake. Is this just the typical idle for the PT or should I close the gap a little more on the plugs? I did read on this site about some people having their plugs gapped as low as .38. What do you guys think?
the factory gap was changed to 0.40. I would gap your plugs to at least 0.35. and do yourself a favor and order performance wires. it's pointless to have perfomance plugs and oem style wires.
They are irridium plugs. .028-.032
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2005 Stone White SRT4
2004 Graphite Auto
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Posts: 821 | From: Oregon
| Registered: Feb 19, 2002, 12:00 AM
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Dream 4
Cruiser Expert
Posted: Jan 20, 2008, 2:02 PM
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Re: [mean green] Rough Idle after Plug Change
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Quote:
They are "iridium" plugs. .028-.032
Yes, Yes, .030 is best for them!
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'05 GT Dream Cruiser Series 4. No.1109
My Mods
PT Trailer Project
Our PTs
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Posts: 253 | From: Annapolis,MD
| Registered: Oct 24, 2005, 5:15 PM
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