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Old 12-04-2007, 02:03 PM   #1
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Default AFR at idle is wierd

i have the aem uegos and ive noticed that at idle... my afr is around 14-15.. but sometimes.. it goes way lean like 17. whats going on here?
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Old 12-04-2007, 02:08 PM   #2
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vac leak
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Old 12-04-2007, 02:12 PM   #3
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vac leak.. really? where do you suppose i should start looking first?
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Old 12-04-2007, 02:32 PM   #4
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Look at the rubber caps that are supposed to be on the intake manifold. There is usually one on the back of the manifold. Otherwise the intake gasket itself, possible a leak around your injectors. All kinds of options.
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Old 12-04-2007, 05:02 PM   #5
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Quote:
Originally Posted by flyineunos View Post
vac leak.. really? where do you suppose i should start looking first?
is your crankcase breather plugged into the intake? Thats where I was leaking from.
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Old 12-04-2007, 07:48 PM   #6
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hmm, i did have a problem with fuel leaking from my injectors when i put them on... but from what i can see, i dont see/smell and fuel from that area... ill go around my motor and check for any missing plugs or loose hoses.
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Old 12-04-2007, 10:45 PM   #7
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its the idle, as long as it runs and doesnt pop, just let it be lean
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Old 12-04-2007, 10:58 PM   #8
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A smooth idle that doesn't fluctuate is worth looking for a vac leak.
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Old 12-04-2007, 11:28 PM   #9
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damnit...my idle will do that too...sometimes...and everytime i drive the car and put it back from neutral it will drop pretty fast and bounce at the 0 and come back up and paly a little bit and go back to normal. I KNOW i don't have a leak. redid all my selicone vacumme hoes and took it to my friends smog shop and smoke it for leak. no leak.....i think its a matter of tuning... making it idle right.
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