2001 yukon still not running!!!

[fisheyes]

Well I have replaced the fuel pump and the fuel filter what a beat down tried to fire it up and still has the same result. Vehicle starts and idles fine for 5-10 seconds then drops down to 200-500 rpm surging the whole time and then dies. No check engine light or codes on a reader and 02 sensors checked out ok. Now what? I'm about at wits end with this one. Anybody have any suggestions?

 

[fisheyes]

Anybody with any suggestions?????????

 

[Mac]

Door Number 1...Clean Throttle body ....maybe that will work.
Door Number 2...Could be a bad crank or camshaft sensors...
Door Number 3...ECU or car computer...is going bad...

 

[ezdaar]

is it drive by wire??

 

[Rivieraracing]

Fuel pressure regulator?
Also, do you hear air bleed off out of the fuel filler when you take the gas cap off?
Just a couple of ideas!

 

[Schwab]

Pull the vacuum line off of your FPR. If fuel drips from the vacuum line, then you need a new FPR.

An intake leak would have to be pretty bad to cause it to die, but it could also be the problem?

 

[My01yuk]

Well if you are not getting a code that makes it kind of hard to isolate. May be time to have a professional look at it. But i would look at the crankshaft position sensor.

 

[Schwab]

Would that kon have a camshaft position sensor? If so, I think there'd be a code if there was a fault with the crank sensor. Not totally sure though.

 

[My01yuk]

Would that kon have a camshaft position sensor? If so, I think there'd be a code if there was a fault with the crank sensor. Not totally sure though.

Not sure about the camshaft position sensor but it has a crankshaft position sensor. I have an 01 yukon and had to replace my CPS back in April. I did get a code however that helped me isolate the problem.

 

[teggenberger]

Fpr?

Fisheyes: Did you fix it? What was the problem?
Thanks.