What is causing my 5.4 to backfire and run rough

25

Asked by Feb 11, 2013 at 09:33 AM about the 2005 Ford F-250 Super Duty XLT 4WD Extended Cab SB

Question type: Maintenance & Repair

Truck barely runs . backfires , catalatic converters glow red . truck will barely move. Computer shows no codes

4 Answers

No codes? Backfiring is usually timing problems or some reason unburned fuel explodes in the combustion chamber during exhaust stroke. If the spark fails in one or more cylinders while engine is running it will backfire, you have a spark and/or timing issue

1 people found this helpful.

Hold on I was not paying attention..the cat glowing...running rich...o2 sensor or some other reason too much unburned fuel in it

1 people found this helpful.
25

Have replaced cats , plugs and coil packs. also fuel pump no results

2 people found this helpful.
30,425

If the cat is glowing red it sounds likes its stopped up, came apart on the inside.that would cause your truck to run bad cant get the exhaust out. replace the cat that is glowing red you will probaly find chunks fallin out when you remove it

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