Question about 1997 Chevrolet C1500

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Engine looses power going up hill, no check engine light at this time.

Engine looses power going up hill, new fuel filter, new fule pump, good gas, new crank sensor, new mass air flow sensor, new 02 sensors, checked all plumbing around intake all connected, Vehicle idles fine, will run smooth on level ground but at first incline engine looses all power can hear popping like backfire thru intake. will slow down to hardly move. sometimes cycling key will help temporarily.

chev techs looked at it at the dealership, want 1600 to take down fuel tank to check out........running out of ideas here

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  • bisbeefarms1 Aug 27, 2008


    thanks, we tried loosening exhaust to releive any back dice. vehicle will run 55 down the level hiway but not take grade. I suspect an item that is sensitive to engine load, dont think we have looked for a map sensor, ( i am not a chevy guy) but we do not get codes, I guess the map sensor could be a fixed value and not give a code.

    This is a v-6 friday dealer put in a dist cap rotor wires ect. They had no codes to go on either. I am still suspect of fuel delivery myself owner is looking into rigging up a presure gage to monitor while driving.

    thanks for your help, will advise when we get r done.

  • Anonymous Mar 12, 2014

    seems to have timing problem but runs great until accelerate on road. have been told that fuel pump can cause this

  • Anonymous Mar 25, 2014

    when the pejero goes up hill it looses almost all power


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Hi there , sounds to me that one more of the valves is not shutting all the way or the piston rings are wore or broken or the timing chain is wore or loose

Posted on Aug 28, 2008

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  • 36 Answers

How old is the Catalytic Converter, sometimes they will get clogged up and affect performance.
Good luck

Posted on Aug 26, 2008

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