c4 20vT running lean
03-30-2009, 10:04 AM
#1
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c4 20vT running lean
yesterday i removed my spark plug and saw that my plug was white on the tip and removed my oxygen sensor it was all white too. i chek everything my car spike to 20psi and old 15psi to redline without bugging. can some one have a idea on what to check thanks,, maybe timing ?
03-30-2009, 11:12 AM
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no i can get afr mesurement other than that if so i would have to make a hole in my downpipe aniway :P , i bought the car with a tap tuned chip i know that they dont have the vmap but my friend have the same setup and the plug are a nice color im kind of confused
if i can this summer ill buy the 034 stage 1+ maybe it will set up my problem
if i can this summer ill buy the 034 stage 1+ maybe it will set up my problem
03-30-2009, 11:14 AM
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03-31-2009, 11:02 AM
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Looks are deceiving. You need to test the fuel pump for flow. 15 sec = 675 mL.
Is your fuel pressure regulator working properly? Is it able to maintain a 4 Bar (58 psi) differential across the injectors under wide open throttle conditions. Either the pump may not be providing enough flow or pressure or the fuel pressure regulator may be bleeding too much flow/pressure back to the fuel tank.
We're not done. You just need to investigate some more things and report back.
Is your fuel pressure regulator working properly? Is it able to maintain a 4 Bar (58 psi) differential across the injectors under wide open throttle conditions. Either the pump may not be providing enough flow or pressure or the fuel pressure regulator may be bleeding too much flow/pressure back to the fuel tank.
We're not done. You just need to investigate some more things and report back.
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03-31-2009, 02:05 PM
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Ok thanks , ill go tchek that at my friend garage. as i remember this can help ! since i have the car the starting seems to take long like 3 cranking before it start and this is not alway like that some time it start great.
ill try to bring it there some time this week !
ill try to bring it there some time this week !
03-31-2009, 03:00 PM
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depending on your fuel, som eblends will give a crystalyn white / ten dust even at the proper air / fuel ratios....
also, the fuel filter is an annual item for a daily driver
also, the fuel filter is an annual item for a daily driver
