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Roger
Roger 3/19/2011
1980 Chevrolet K10 Suburban Silverado 8Cyl5.7L - Engine
My 1975 Suburban runs but does not have the power it should. It takes a long time to get up to speed.
I have even floor boarded the gas and the engin roars but it still doesn't go much faster. The truck stays started when stopped and sounds good. Could this be transmission trouble or just a good tune up? Thanks if you can help.
2 Answers
  • J and K AUTOMOTIVE TOWING AND REPAIR
    have you checked your transmission fluid level and the condition of the fluid
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    J and K AUTOMOTIVE TOWING AND REPAIR
    Roger 3/19/2011
    Yes, I did check the fluids and they were just fine. Thank you so much for your reply. I sure do apprieciate it.
  • HouseCallAuto
    HouseCallAuto 3/19/2011
    Sounds like a clogged catalytic converter. 1975 was the very first year catalytic converters were used as an emission control device, imagine that. Confirm this by removing the oxygen sensor temporarily just for a road test. if the power comes back SUBSTANTIALLY then you have diagnosed the cause. Then buy a replacement converter and replace the O2 sensor at the same time.

    Another cause could simply be that the ignition timing is way off, too far retarded. Check the timing first, even before doing the above. Also, after verifying that the timing is good, replace the inline fuel filter in the carburetor. they are very small and often become completely clogged and block the flow of fuel causing severe hesitation. Thats all I got for now.
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    HouseCallAuto
    Roger 3/19/2011
    Thank you for your help. I will sure try both these steps. That is so interesting about the catalytic converter can cause this problem. It did cross my mind about the timing, but I just wasn't to sure. I just bought the vehicle and not sure how long it has been running like that. Again thanks for your input. I greatly appriciate it. Thank you house call auto!!!
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