Engine/Transmission (1994 - 1998) Significant power loss on 97

[Got Smoke?]

A friend of mine has a truck near identical to my new one.



97 2500 Club Cab LWB 4x4 5spd with 3. 55 gears and only 97,000 miles. A short while ago he noticed what he described as a "significant power loss" followed by hard starting.



Well I started with the basics sense he hasn't has this truck very long. 1st was a fuel filter. He said that seemed to help some, but didn't quite get it "all back. " So I took a OEM overflow valve and checked the spring in it and swapped him for his. Again he claims it helped, but didn't get all of his power back. Any idea's on where else I might look? This has got me stumped just a little, and I feel like an idiot because its probably something I encountered with my first 97 and am not remembering right now.



As for the starting problem I had him try tapping the pedal on start up and it fires right up when he does so. I looked @ his idle speed one day last week and I think it was normal, but cannot positively remember. I may try bumping it a little as my old truck needed that to improve hard starting once.



TIA

Mark,

 

[tp0d]

Hmm... for lack of other options, have you checked the condition of the fuel supply/return lines? also that damned U shaped hose at the fuel heater... hmm... possibly a turbo leak? get him some gauges...



good luck



-j

 

[bmoeller]

Is the fuel strainer clean? How is the air filter? Throttle linkage moving freely all the way back and forth? Boost line going to the AFC housing pinched or cut?

 

[Jeff H]

Check lift pump pressure.

Need some more symtoms. Smoke for starters. White,grey black?

Boost pressure?

Pyro temp?

Fuel shut down solenoid for full close and open.

Check rubber boots on boost duct. They tend to slip off. Loosen them all Reposition them and tighten them down good. Also boost line that runs to the afc housing. Check that too.