I got my old 79 ford 460 to start & run but its rough and poping and backfireing through tailpipes.what could be causing this new cap rotor & housing new pickup coil new ignition modual .

Asked by Dec 02, 2015 at 12:51 PM

Question type: Maintenance & Repair

3 Answers

46,385

Could have a partially stuck open exhaust valve. Is there ticking noise coming from the valve cover area of the engine? Could also be stale fuel or dirt in the carburetor. You could have a couple of the spark plug wires in the wrong position on the distributor cap. How long since this engine was last run?

46,385

Ignition timing could be off.

1 of 1 people found this helpful.
60,665

I would go with checking the timing.

Your Answer

Add photo

Related Questions

Shortcuts

Search Maintenance & Repair Questions

Maintenance & Repair Experts

#1 Tom Demyan
Tom Demyan
Reputation 168,920
#2 dandyoun
dandyoun
Reputation 91,590
#3 tenspeed
tenspeed
Reputation 73,920
View All

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.