2.2 running rich...still

[ozzy]

I have a 1990 2.2 .,,that is giving me fits...it runs rich..no matter what i replace and do to it...new ecm..new egr..new 02 sensor..mas air flow sensor .., map sensor. it bucks with a fluxuating idle.it runs better  when i unplug the o2 sensor......what could be causing this..any idea appreceiated..thanks in advance...

[Guest]

have you checked the fuel pressure regulator it could be dumping to much fuel

[ozzy]

no..not yet..i can get it to run for a month without any problems..then it will run like crap..could the fuel pressure reg run good then bad and back to good again?(intermittenly).....

[Guest]

When it comes to a car I've learned ANYTHING is possible. If it was my car i'd check your fuel pressure, you might want to consider cleaning the egr valve or at least checking it out

[ozzy]

took your advice...gunked the you know what out of the egr and i finally got some air flow thru the tube...threw in a new o2 sensor and reset ecm...running good now..thanks for the advice...i think this will be an ongoing problem in the future  but atleast i now have the fix for it...thanks again!

[Guest]

maybe want to replace the egr valve it's not to bad napa # 33068C priced at $45.64  Not as bad as I thought it'd be.

[ozzy]

ya i wanted to buy one at auto zone but they advised me to try and clean it first to save the bucks..

[Guest]

I once worked at an Autozone I really don't recommend their emmission/electrical parts ALOT of those came back bad. I understand some were due to owner stupidity, messing up parts. but most were shotty workman ship I went through 5 alternators right off the shelf using their bench tester coming up bad before I found a good one when I worked there.

[ozzy]

thanks for the tip off on AZ..i have noticed that plug wires i get  i have to go back real soon and get replacements under the warranty.....have napa close by they did me right on an s-10 i was working on..thanks again

[IsaacHayes]

EGR won't cause problems unless it's stuck open. The style I have always sticks closed and just puts on the SES light is all.

AZ does have some crappy electronic parts. I got a CPS there for cheap and it failed very soon. Went to another store and it was 3x the price and looked like OEM. I too have heard a lot of troublesome parts coming from there.

[Guest]

You think they're electric parts are $hit, Their rebuild motors are WORSE while I was there 9 out of 10 motors came back w/ problems. cracked blocks, bad rings, but I think the best was 1 motor that had like 3 different piston bore sizes.   I gave up even trying to sell them. (carbs. wern't much better)