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sputtering idle

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Old Feb 4, 2013 | 07:30 PM
  #1  
littlewack's Avatar
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Joined: Oct 2007
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From: Utah
sputtering idle

Wondering if you guys have any ideas. My car's idle has always been rough.. As far as I know it doesnt have cams.. here is a video link.. Wondering if Im crazy and nothing is wrong.... Let me know your thoughts.. thanks..

It has rough spots /sputters.. seems to do it most when the car is warm.

http://s124.beta.photobucket.com/use..._0982.mp4.html
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Old Feb 4, 2013 | 08:22 PM
  #2  
slimjim1804's Avatar
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Joined: Oct 2012
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From: north Jersey
Could be a minor boost leak. Looked to me like AFR's @ idle are in check, IIRC with an Evo w/ a MAF, boost leaks will manifest themselves as a lean idle, rich WOT.
Looks normal to me, great to me actually, but I'm used to a big cammed VIII with a low idle.

Start with the basics. Check all vacuum lines, clamps (and positioning of), couplers and pressure piping to make sure everything is snug.
Clean your MAF.
Perform a boost leak test.
Could be IACV.

Or it could be a non issue, these cars aren't exactly corollas, especially when modified.
I'd say start with the basics above and report back.
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Old Feb 4, 2013 | 09:15 PM
  #3  
littlewack's Avatar
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From: Utah
thanks for the ideas..

I probably should have also mentioned everything i've done since owning the car(july)

It was tuned by Tobz in Denver when I purchased it. Since then I have had it tuned by Aaron @ ER. it is an SD Tune.

Previous to Aarons tune I replaced all spark plugs, performed a boost leak test and ended up replacing the TB shaft seals and TB gasket. Also I did notice one injector seal was leaking at the intake mani.. I've got the seal now just need to throw it in.. but it also wasnt leaking until about 20psi.

had the issue before and after the new tune. Also checked all EGR Vacuum lines. Everything appears to be great.. wondering if it could be the front O2 sensor?
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