HELP I HAVE A BACKFIRE
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Freshman User
Joined: Mar 2014
Posts: 42
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HELP I HAVE A BACKFIRE
Hi everyone I don't post much on here, but my 74 f100 has had only one issue since i have had it. Its my daily driver and i don't have anything else wrong with it mechanically, but it likes to backfire when i want to hit the gas real hard. I narrowed it down to either timing belt, or maybe I need a tune up and new spark plugs. Any thoughts?
Junior User
Joined: Oct 2011
Posts: 57
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Junior User
Joined: Oct 2011
Posts: 57
Likes: 0
Try this....the vacuum line to the distributor, unhook it and plug it at the carb, drive it to see if it helps...
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Elder User
Joined: Jul 2015
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I just went and put a 454 into a friends truck and let them do the tuning it back fired every time they stomped the gas I suspected the very loud ticking noise until I realized they had been timing the motor to ~8 degrees and leaving the vacuum advance connected they retimed it still had the ticking still made an odd noise when you hit the clutch still slower than my f250 with a camper (not a shell) on it but no backfire
Senior User
Joined: Jun 2007
Posts: 394
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From: Springfield, Il
If your running a points system I would try changing the condenser. My 73 390 had an issue with back firing out of the exhaust. I changed the $5 condenser and has been perfect since then. If your not sure what it is take the distributor cap off, it looks like a AA battery. Very inexpensive and very easy to change.
