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I have a problem with my 1999 Focus where the idle revs seem to fluctuate a little. I have noticed they do it more when you have the lights, radio and heated screens on. Could this be something to do with the alternator? The more things on – the more it will do it.
I asked a question on here before and found out that my fan belt may need replacing, could this have something to do with it?

The car does not have really erratic revs sorts of revs however they do move up and down slightly when it is idle, if you have a few things on in the car, the revs drop and then go up and then drop, i think they go down by one needle point. In the dark, the lights will dim.

Any help would be greatly appreciated.

Rob

2007-02-28 03:57:58 · 3 answers · asked by Robert T 2 in Cars & Transportation Maintenance & Repairs

3 answers

have the altenator tested to see if it is putting out the correct amperage. if it is not correct then replace the alt. if it is fine then have a shop run diagnostics check on the computer to see if there are any codes in it to suggest something else being the problem.

2007-02-28 04:05:17 · answer #1 · answered by Anonymous · 0 0

Hi Rob, yes the belt could either be to loose or stretched, or the self tension could be getting weak allowing the belt to be loose. Another possibility is the alternator. Weak diodes or maybe the internal regulator is going bad. It could be that the mil age is high enough that the timing belt has stretched allowing timing to retard causing a low idle condition. The throttle body could also be dirty, weak injector, throttle position sensor, or even a cell in the battery.

2007-02-28 05:56:19 · answer #2 · answered by lildevil h 1 · 0 0

appears like a Vacuum leak. verify all the little hoses coming from the genuine of the motor, and observe if one's popped loose. in case you comprehend the position the "air field" is (it has your air filter out in it) follow it as a lot as your motor and search for any hoses connecting to it and your throttle body. The "once a minute" subject would also be some thing causing a short, or electric powered surge, at the same time as your radiator fan kicks on. look at your spark plug wires too and observe if any are susceptible. regardless of it really is, do not problem, it really is likely no longer significant. frequently, sputters at idle are minor issues making a significant scene!

2016-12-05 01:42:41 · answer #3 · answered by bartow 4 · 0 0

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