SOURCE: On my 2001 Ford Focus.
IS YOUR LOUD VIBRATION A LOUD RATTLE IF SO IT COULD BE YOUR CAT BREAKING UP THIS WILL CAUSE BAD RUNNING ..GIVE YOUR ENGINE A GOOD REV 3 or 4 TIMES OUT OF GEAR AND LISTEN FOR A RATTLE,,,,, HOPE THIS HELPS IF NOT CHECK THAT THE EXHAUST IS NOT BLOCKED ?? BEST OF LUCK-ELL BOY.
SOURCE: FORD WINDSTAR 3.8 V6 ENGINE IDLE ROUGH UP AND DOWN WHEN STANDING
Usually the fuel pressure regulator vac. hose pops off? If not listen for a slight whistling noise (vac leak).
SOURCE: Rough Idol, Running rich, Burning gas, Smog smell
1. change air filter. 2 check timing. 3 check all fuel lines and connections for leakage. 4. dirty or clogged injectors.
SOURCE: Our 2001 ford focus when it idles it surges
Check the pcv hose for leaks at the intake manifold. Common problem.
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