1990 Ford F-250 ford f-250 king cab

1990 FORD F-250
90,000 MILES • 6.0L • V8 • 2WD • AUTOMATIC
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RANDY SHARP
  • MEMBER
  • 165 POSTS
I put a fuel pump a while back before this it ran fine just needed a fuel pump.But when I dropped the tank,and put another pump in it wasn't a new pump,but I have checked the pressure and it is where it is suppose to be.But now the truck will idle fine but you give it gas and it backfires through the exhaust pipe,I am not sure what happened but after I installed the fuel pump this started happening.Does anyone have a theory on this subject I would appreciate it
Sep 20, 2014 at 2:50 AM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
if it backfires check to see ifyour compression is ok and if valves are working ok may be a bent pushrod or broken follower/spring.
Sep 21, 2014 at 11:27 PM
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