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2002 Ford Focus rough idle

Tiny
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  • 2002 FORD FOCUS
2002 Ford Focus 4 cyl Front Wheel Drive Automatic

I have an 02 focus se. Recently I have been getting a rough idle after first starting the car after it sits overnight, like the the engine shakes and whole car vibrates.. Runs fine after the car reaches normal operating temperature. Anyone have any ideas what may cause this.
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Wednesday, September 8th, 2010 AT 9:49 AM

12 Replies

Tiny
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Engine running rough or misfiring can be cause by the following:

1. Defective spark plug
2. Inadequate spark/coil, defective spark plug wire.
3. Lack of compression
4. False air leakage.
5. Faulty fuel injectors.
6. Insufficient fuel pressure.
7. Contaminated fuel.
8. EGR valve that is leaking.
9. Oxygen sensors.
10. Throttle position sensor.
11. Idle air control valve.
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Thursday, September 9th, 2010 AT 12:33 AM
Tiny
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This only happens when engine is cold. Car is fine after it warms up. Has new fuel filter, new plugs and wires, new air filter. Engine light is not on. I was thinking motor mounts maybe. Any suggestions. Anyone. Thanks!
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Thursday, September 9th, 2010 AT 8:59 AM
Tiny
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Try checking the coolant temperature sensor-
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Thursday, September 9th, 2010 AT 11:32 AM
Tiny
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Thanks!I will try it, but wouldn, t that light up my check engine light if it was faulty.
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Thursday, September 9th, 2010 AT 2:31 PM
Tiny
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Sometimes a sensor will failed w/o popping the CEL
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Thursday, September 9th, 2010 AT 2:34 PM
Tiny
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Thanks! I will try it, see what happens.
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Friday, September 10th, 2010 AT 6:37 AM
Tiny
MICKMC
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Having the same issue. Were you able to resolve it?
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Wednesday, October 6th, 2010 AT 7:14 PM
Tiny
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No not solved. People telling me could be motor mounts. Wasn, t like it until my thermostat went, and I installed one from Canadian tire, but can, t see a thermostat doing that, even if it is faulty, don't think it will cause that. When I start on cold engine. Gets vibration throughout car until it warms up.
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Thursday, October 7th, 2010 AT 7:21 AM
Tiny
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Going to be changing motor mounts today. Will let you know how it turns out.
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Thursday, October 7th, 2010 AT 10:06 AM
Tiny
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Okay, thanks!
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Thursday, October 7th, 2010 AT 10:16 AM
Tiny
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Going to be changing motor mounts today. Will let you know how it turns out.[/Quote:30177b68a6] k thanks!
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Thursday, October 7th, 2010 AT 10:19 AM
Tiny
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Problem solved. Thanks for responding
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Thursday, December 9th, 2010 AT 1:33 PM

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