my car is being major PITA this week... little help

[ubernasty]

nope

[txtorquemade]

it probably jumps around because your car has air in the cooling system. you lose power because the coolant sensor is a primary source for calculating the amount of fuel to be injected. the O2 is just a minor correction factor, for the most part.

I....did not realize this. I have to say, for what its worth, i replaced my o2 sensor and realized a huge gain in power and throttle response.

[ubernasty]

I replaced my intake elbow because there was a crack underneath and cleaned the icv.
I got her running pretty good but when i went for a drive around the block it started to hesitate again under throttle. I got it back to my house and cleaned the icv again. Waiting for it to dry and i'll see what happens.
I'm guessing it should be fine after this because the first time it was dirty as shit and the car run better, and the second time a little more debris came out.

[ubernasty]

Well, looks like its good for now.

Time to do some work on the bay now and all the maintenance things i've been putting off.

[txtorquemade]

Glad you sorted it out. Is it running normal now or still have issues?

[ubernasty]

I'm still having problems. It seems to run fine for a minute or two but then starts stumbling again. When i throttle it makes it worse and won't accelerate at all but when i let off the gas it seems to want to pull a little bit.

I'm gonna check the fuel filter but i'm not sure what else would cause it to run good-bad-good-bad.

any ideas, something i missed?

edit: its kind of like it keeps slipping into a loop.

[Bimmerfreak87]

still won't stay running, smells of gas very strong.

Is the strong fuel smell still there? Did you ever find out where that was coming from... rail/injectors/fpr/flooding/leaks???

[ubernasty]

Is the strong fuel smell still there? Did you ever find out where that was coming from... rail/injectors/fpr/flooding/leaks???

no it doesn't smell like fuel anymore. I think it was the clogged icv.

It still slips into "fits" where it hesitates and doesn't want to run tho... any ideas somebody? fuel filter, o2?

[blocke]

Check the AFM plug for shorts, etc. These were very similar symptoms to my car when my plug ( i have miller maf), had a short inside the plug boot. I would imagine the ICV should only affect idle, unless its stuck open, allowing un-metered air into the system. If its stuck closed, it would affect idle, but should not affect things above idle.

Glad you are on the way to having it running well again.

[nando]

air from the ICV is still metered..

[blocke]

air from the ICV is still metered..

Your right, total brain fart there. Its AFTER the afm

[ubernasty]

Check the AFM plug for shorts, etc. These were very similar symptoms to my car when my plug ( i have miller maf), had a short inside the plug boot. I would imagine the ICV should only affect idle, unless its stuck open, allowing un-metered air into the system. If its stuck closed, it would affect idle, but should not affect things above idle.

Glad you are on the way to having it running well again.

how do you check it for shorts? ohmmeter?

[ubernasty]

Don't know why i didn't try this first, but i ordered a temp sensor today and i'm hoping that fixes the problem. Makes sense since my temp gauge was bouncing around.

[ubernasty]

Update:

Took the car out tonight for a run around the block and everything seemed to be alright so i went for a longer drive.

Only problem i noticed was that the spot where it would break up and stumble around 4-5k rpm before has gotten significantly worse. It doesn't even want to pass 4-5k in a burnout anymore.

I'm guessing its still the o2 which has just gotten worse?

[payney8]

check resistance as per bentley