hi all. i have a 2000 jimmy 4.3 4wd 2dr. 80k miles. the problem im having is upon start, hot or cold it just wont run for a few minutes. id say till it warms up but it does the same thing even if i start it warm. it turns over fine from cold or hot, and if i just put it in drive and try to pull out it just bucks. i have to let it idle a few minutes then it seems fine. im assuming its fuel pump related... just wonding if anyone has encountered this or has a suggestion...
sorry if this is a repost.. had new clue what to search for
thanks

 

I would actually lean towards a gummed up throttle body. Have you run through the general tune up items (plugs, wires, cap, & rotor) or know when they were replaced last? How about cleaning of the MAF sensor, EGR valve, and throttle body (all covered in the Tech Article (DIY) section).

 

yeah that was the first step. new plugs wires cap n rotor. basic tune up stuff. havent checked the maf or anything. plan on checking the fuel pressure tomorrow.