1995ta383

When i start my car up my wideband shows that it is running way lean (16.0:1) then after it warms up for like 5 minutes it goes back to normal. But when i get on it after about 4-5 seconds it shows way lean again. it runs fine tho. what could be causing this. Could it just be that my wideband sensor is bad or maybe the fuel pump.

jb442

iTrader: (4)

I would clean your MAF if you haven't done so in a while & see if it helps. From what I understand, a dirty MAF will cause a lean condition because it's reading low compare to the actual air flow. As far as the fuel pump/filter goes, a simple pressure check with a gauge should eliminate that as the cause.

1995ta383

Thanks, I guess I never thought about that I will give cleaning the maf a try. As for testing the fuel pressure it is fine with the engine off and at idle but I have no way of testing it under load which is when im having most of my problem.

jb442

iTrader: (4)

You can get a fuel pressure gauge fairly cheap here:
http://www.amazon.com/Actron-CP7838-.../dp/B0009XQUKC
or maybe from one of the sponsors on the right? --->

Best way to test under load is to run the line underneath the hood and tape it to your windshield (just don't hit the wipers! LOL).

CRC does makes a specific MAF cleaner spray... Eventhough, I've heard it's just about identical to most electrical contact cleaners.
http://www.amazon.com/CRC-Mass-Flow-.../dp/B000EGH57G