Truck starts bucking and backfiring going up hill

1971 CHEVROLET TRUCK
120,000 MILES • 0.5L • V8 • 2WD • MANUAL
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RICHARD GEEHAN
  • MEMBER
  • 1 POST
When I go up a big hill on my driveway and it is warm it starts bucking and backfiring.
Dec 18, 2020 at 7:20 AM
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ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
Good evening,

I would start with basics such as plugs, wires, cap and rotor to be sure you do not have cross firing.

https://www.2carpros.com/articles/engine-backfires-while-running

https://www.2carpros.com/articles/how-to-change-spark-plugs

Did you change the points and condenser as well?

I would also check the compression as well.

https://www.2carpros.com/articles/how-to-test-engine-compression

Roy
Dec 18, 2020 at 7:33 AM
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