Hi, I have a 2000 Limited 4wd automatic 3.4
I bought it a few weeks ago and it had a P0171 code lean fuel. I replaced the MAF and the O2 sensors and it cleared... but then a new issue.
I have been having intermittent issues where the runner won't accelerate. This happens in two different scenarios;
- I have driven, parked and then if I get back in after a few minutes I can give it gas and have to pump it several times to get it to engage. (most recently I dropped it into 2nd gear and then back into drive and it engaged that way.)
- I'm on the highway, and over 55 mph and giving it gas does nothing initially but then it surges (as I am now pressing down on the gas trying to get it to do)
I've read several things, some say it's the TPS, others say the fuel pump. It's certainly not the MAF or O2sensors cause those are OEM brand new.
I'm at a loss. I already bought a new fuel pump and filter, and I'm getting ready to buy a TPS. I'm praying not the Tranny or crankshaft. My buddy said it could be the differential.
Also I pulled out one spark plug and it looked like new. Getting ready to do a tran flush as well. I've worked on the last couple cars I've owned but I'm still pretty uneducated, I wouldn't call myself a mechanic... More like seeing if I can handle certain things on my own to save money.
Has anyone run into this?
My issue seems very similar to this;
Random hesitation when accelerating
and this...
Loss of power when accelerating