lex 550s boggin out near 3000 rpms?

night-rider · 09-05-2007, 04:29 PM

i ave chbecked all my vacuum lines and thbey are all good and my pressure regulaer hbas a vacuum line to it and it automatically increases fuel pressure pound for every pound of boost , anothber thbing ive noticed it will do it at an idle it is hbarder to nitice but i can feel it hbere and thbere and it flickers to lean whben it hbappens , occasionally it will drop thbe idle down to about 500 and it will constantly show lean then ill rev it up and it will be normal again

abhattan · 09-05-2007, 10:38 PM

It's kind of hard to say without me actually listening to it and experiencing it myself. If your timing is good, I would also check the cam positioning sensor or the crank sensor. Were the injectors used? If so, did you have them benched flowed?

supradrift · 11-07-2008, 01:03 AM

night rider did you ever find out the problem? my car is doing the excact same thing and cant figure it out

09-05-2007, 04:29 PM	#1
night-rider Stock Join Date: May 2006 Location: grande prairie Posts: 22	i ave chbecked all my vacuum lines and thbey are all good and my pressure regulaer hbas a vacuum line to it and it automatically increases fuel pressure pound for every pound of boost , anothber thbing ive noticed it will do it at an idle it is hbarder to nitice but i can feel it hbere and thbere and it flickers to lean whben it hbappens , occasionally it will drop thbe idle down to about 500 and it will constantly show lean then ill rev it up and it will be normal again __________________ 1987 turbo full 3" exhaust, k&n fipk, manual boost controller, walbro 255lph fuel pump, aeromotive afpr, 550cc injectors, lexus afm, fal dual electric fans, fluidyne rad, 3 angle vale job, adjustable cam gears

09-05-2007, 10:38 PM	#2
abhattan 3" Exhaust Join Date: Oct 2006 Location: Brentwood, New York Posts: 162	It's kind of hard to say without me actually listening to it and experiencing it myself. If your timing is good, I would also check the cam positioning sensor or the crank sensor. Were the injectors used? If so, did you have them benched flowed? __________________ '91 Turbo Targa 5 Spd. '87 Corolla GT-S 5 Spd '91 Accord Daily Driver 5 Spd Soon to be rebuilt (All to some extent)

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11-07-2008, 01:03 AM	#3
supradrift 3" Exhaust Join Date: Jul 2006 Location: connecticut Posts: 92	night rider did you ever find out the problem? my car is doing the excact same thing and cant figure it out