hi. i have a 93 laser awd. yesterday i installed a 16g turbo and a evo 3 o2 housing and a 2g tb elbow with a custom made upper intercooler pipe and a 3inch gm mass and the maft computer.
heres my issue. it passed etest. but it idleled rough from the day i got it runing. i installed vac boost guage and af guage yeaterday aswell.
it idels like a tank vry very rough and the idel goes crazy sometimes. the car at best has like -10 -12 vac at best. i know my other car was -16. what can cause this?
i know when i bought the car from this guy in to he didnt have a friggn clue about cars and he lied to me big time.
he told me the timing belt was changed. i took the upper cover off and looked at the tbelt and it looks newer....still soft black.
the engine has no blow by...0 and i did a compression test 150 150 138 150. its within spec.
could i have a intake manifold gasket leak or something stuppid? or could it be the timing belt is off a tooth or two. does anyone have a idea. thanxs!
Re: need help with low vac and ideling stupid.
[Re: Ben Kalinowski]
#245611 October 21, 200702:39 am UTCOctober 21, 200702:39 am UTC
i had swiss chease in the outlet intercooler but i fixed it and now that the gm mass is right beside the battery it can only be the throttle body or the intake manifold or the gasket.
if not valve timing?
no engine lights or nothing....
Re: need help with low vac and ideling stupid.
[Re: Ben Kalinowski]
#245620 October 21, 200703:48 am UTCOctober 21, 200703:48 am UTC
Sounds like you should do a boost leak test and check the timing marks. http://www.vfaq.com
If you don't have the MAF-T set up properly you could have missfire and low vacuum. Same for any bad ignition components. Computer, injectors, missing shift keys, etc..
1993 Eagle Talon TSi FWD 13.8 @ 106 :::: 14.1 @ 117
Re: need help with low vac and ideling stupid.
[Re: Rob Strelecki]
#245709 October 22, 200712:49 am UTCOctober 22, 200712:49 am UTC
it was runing stupid before any mods. it passed etest running like a tank. i will boost test it and then im gonna change the lifters and check the vlave timing.
Re: need help with low vac and ideling stupid.
[Re: Ben Kalinowski]
#246153 October 26, 200712:00 pm UTCOctober 26, 200712:00 pm UTC