i bet a million people have had the same propblum. ill make this quick and simple basicly i was cleaning my intake pipe and what not removed it and put it back and cleaned inside my intake plenum around the trottle boddy. i put every thing back togeather and now when i start my car and it warms up. as soon as it gose into loop it stats to idle wierd bouncing up and down in like perfict sequince i dunno what is wrong i need this car for work gotta try and fix it quick. please help anything will do even somewere to start looking....

 

have you tried adjusting the throttle adjustment screw on the tb?

 

like the little idle adjusting screw underneath the throttle boddy . the idle speed screw??

 

well i think i fixed it. drove around for a good half hour no problums. i just cleaned out the iacv(day befor)(i guess not enough coolent was geting to the iacv when the thermostat opened.) and earlyer i had spilled some coolent out. but today i toped her up and let it heat up. opening the little nipple to let out air then bam she went into loop and no messed up idle.

please bare with my grammer.

 

maybe not still doing it i tryed the adjusting screw but no go. i dont even get a CEL i dunno this sucks big time i wasted like 4 hours out there with her.

 

idle cont valve could be bad
or still coolant leak or clog
maybe intake air leak.

 

see i thought the up and down idle was my dizzy going but man i so rather it be something like this, ill just have to go over everything again.

what about headgasket. how could i cheack for that without a compression test or leak down. and i cant really tell if its white smoke.

 

maybe a vacuum leak, when i put my head back i didnt push PCV hose all the way (my hands were too big :D) and when engine warmed up the idle would be bouncy too