Back firing and rough idle

Tiny
COLAN H
  • MEMBER
  • 1972 FORD CORTINA
  • 1.6L
  • 4 CYL
  • 2WD
  • MANUAL
  • 1 MILES
Brand new engine fitted and fully reco carb also fitted, genuine weber, downdraft
Monday, June 10th, 2019 AT 9:29 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,708 POSTS
Welcome to 2CarPros.

Is the back fire through the carburetor or exhaust? Have you checked for vacuum leaks which can cause this? How was the carburetor adjusted?

Here are a couple links you may find helpful:

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

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

Also, are you certain that you have all ignition wires to the correct cylinders?

Let me know.

Joe
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Tuesday, June 11th, 2019 AT 9:25 PM

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