I have a 1990 Ford F150 4x4 300 6 cylinder. The truck seems to run fine when you first start it in the morning and the engine is still cold. Once it warms up the motor starts surging and idling rough and bucks and kicks at a steady speed. And has a strong fuel odor coming from the exhaust.
Sounds like one of your chambers isn't firing. Run your car for a few minutes, shut it off then pull your plugs one at a time and see if one of them is wet. Might just need a new plug.
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A couple of possible problems, low compression on one or more cylinders, possibly a burned valve, possible headgasket leaks, have the compression tested and checked for a headgasket leak, both of these conditions would cause a rough idle and then seem to run normally when warmed up.
The check engine lamp will flash when the computer/emission system sees a problem that could possibly damage the catalytic converter or other components. Often the cause is a cylinder or cylinders that are misfiring which will make the engine run rough. Because the light has been flashing you should have the problem checked out and repaired to avoid any possible damage. Good luck, hope this helps!
YEP DIRTY CLOGGED STOPPED UP FUEL INJECTORS OR FUEL FILTER WILL CAUSE MISFIRE ROUGH IDLING ENGINE.HESITATION ON ACCELERATION.YOU WILL GET THE SAME PROBLEMS WITH CLOGGED INJECTORS LIKE TIMING PROBLEMS.
Hi check all the fuse. fi the fuse are ok . remove the coil pack and reverce if the cly missifire change replace the coil if not chage replace the electronic comtrol module ok.
Engine wont shut off after key is shut off. Bucks and snorts then dies.
runs fine when warm. but when it cools off it wont start.
FORD F150 KNOCKING AND RUNNING ROUGH
puffs white smoke when running
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