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Truck stalls at freeway speeds

Tiny
AJB31666
  • MEMBER
  • 1973 CHEVROLET TRUCK
  • V8
  • 4WD
  • AUTOMATIC
  • 48,000 MILES
1973 Chevy K20, sputters out under heavy loads. Going up hills or trying to get to 55. Changed all the obvious things. Whats left. A new carb?
Friday, January 28th, 2011 AT 10:25 AM

3 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Sounds like a carb problem with accelerator pump/main metering/power valve-also check fuel pressure/ignition timing
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Friday, January 28th, 2011 AT 10:37 AM
Tiny
AJB31666
  • MEMBER
  • 4 POSTS
Replaced fuel pump & filter, rebuilt the carburetor, new hoseses and vacuume advance, set dwell, idol, and timming, new points, rotor cap and dist. Cap. Plugs and wires are not that old and look fine. New gas cap, airfilter, even put a cloths pin on the fuel line for the hell of it. The carb is very clean and looks great, but could it be warped or something? It is 38 years old and I wouldnt know where or what is warped. I think it is all new carb time. Dang it
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Friday, January 28th, 2011 AT 11:14 AM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check and test the coil and ignition switch could be heating up and breaking
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Friday, January 28th, 2011 AT 7:04 PM

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