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Old 04-17-2005, 11:55 AM   #1
staticfritz
Scooby Specialist
 
Member#: 66934
Join Date: Jul 2004
Chapter/Region: NWIC
Location: Seattle WA
Vehicle:
2004 JBP FXT
2002 cammed OBS - RIP

Default nasty idle....searching?

i rebuilt an ej25 last weekend to go in my car.

spicy cams, new valvesprings, light flywheel, cai, el-headers, cometic gaskets

i'm getting a real nasty idle,it's spends a lot of time searching (from ~500-1000rpm) and i get crazy vibration. as soon as i touch the throttle, the vibration goes away. crusing at 3-4krpm, the shiftknob is vobrating a fair bit. other than that, car drives fantastic, but what to do about my idle?

is it possible the timing belt is off by one tooth on a cam sprocket? (i'm 95% sure it's not off, but...?)

i'm running really rich right now too. matt suggested hotter plugs (93 octane)...could this be the source of my problems?

any suggestions or help form those of you more experienced in the n/a stuff would be great.
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Old 04-19-2005, 08:57 AM   #2
staticfritz
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Member#: 66934
Join Date: Jul 2004
Chapter/Region: NWIC
Location: Seattle WA
Vehicle:
2004 JBP FXT
2002 cammed OBS - RIP

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nobody?
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Old 04-19-2005, 09:26 PM   #3
AWDsub
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Join Date: Mar 2004
Chapter/Region: NWIC
Location: Vancouver
Vehicle:
2010 Legacy GT

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With your set up you can expect a little rougher idle. But are you sure that you dont have a bent valve? Try a compression test and of course, check your PCV valve.
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Old 04-19-2005, 10:33 PM   #4
staticfritz
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Member#: 66934
Join Date: Jul 2004
Chapter/Region: NWIC
Location: Seattle WA
Vehicle:
2004 JBP FXT
2002 cammed OBS - RIP

Default

the intake manifold cam off my old engine which was running perfect, so i'm doubtful about the pdv....but maybe i do have a valve issue...hmmm
compression test it is...
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