90 leg 2.2 5 speed. Car won't idle, was running fine, pulled up to a stop light and it dies, restarted just fine but I had to sit on the throttle to keep it idling...where do I start? MAS, TPS, IACV? other parts to check??

Thanks

Intake tube and PCV/breather hoses. All attached correctly and none broken/cracked.

 

Vacuum hoses.

 

Idle valve stuck.

 

EGR valve stuck open. Dunno if a 90 would have EGR.

no iacv or egr on a 90 2.2 i have two :-p, any trouble codes? if not i would check the maf sensor first and see what happens. another thing to consider is an injector i just did this to one of mine a while back.

Edited July 27, 201213 yr by mikaleda

90 idle motors likes to gum up just had one stalls when going round town ok on hyway idle motor was pluged with oil and carbon and struggling to move

no EGR on 90 but I am pretty sure it has an IAVC, I will check hoses

my step dads 97 2.2 has an iacv neither of my 90 2.2s have one, that i know of but they are kind of hard to miss.

Edited July 27, 201213 yr by mikaleda

I probably shouldn't have but I adjusted the idle screw, at least that should get me safely home...probably the TPS needs to be replaced

tps is around ten bucks at junkyard last time i was there, don't go to auto parts store an oem replacement tps is around $300. i put a tps on one of my 90's out of the junk yard and it worked just fine.

also before you put a tps in are you getting any codes? you can check them yourself on a 90 without a scan tool its obd1.

Edited July 28, 201213 yr by mikaleda

I probably shouldn't have but I adjusted the idle screw, at least that should get me safely home...probably the TPS needs to be replaced

 

No you shouldn't have. Now the ECU thinks your foot is on the pedal all the time.

 

But hopefully you didn't adjust it far and you can set it right back where it was. You'll want to.

TPS is expensive because they don't often fail, and when they do you can get them cheap at a junkyard. But it has to be adjusted properly so the ECU knows when the throttle is closed.

yea, I only tweeked it a little, and marked it so I can reset it.