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locating possible vaccum leak?
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Fordmandan87
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just one possibility for thought look at ur ac compressor when it goes up and down may be ur low on freon
mikeinri
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Start with the visual and audio inspection. If that doesn't work, you can use ether (starting fluid). VERY CAREFULLY (very small amounts at a time), spray some ether at the vac lines while the engine is running. You should hear the idle speed change if the ether hits the leak.
Mike
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What does low freon have to do with a vacuum leak or idle problems? If your freon drops below a certain PSI the pressure switch on the A/C line will kill power to the A/C clutch (basically preventing it from coming on when you don't have enough R12 or R134 in the system. Otherwise you would seize the compressor...
mikeinri
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OK, now this is getting interesting...
Are you really having idling problems, as in, does it happen when the a/c is off? If so, that could be a vacuum leak (could also be other issues).
If it happens only when the a/c is on, as DeRocha mentioned, you may be experiencing the a/c clutch engaging/disengaging because you are low on freon. This would have nothing to do with a vacuum leak, but would be a sign that you have a freon leak.
Theoretically it's possible that you have no freon leak, and that the idle is goofy only when the a/c is running and putting additional load on the engine, but I would rule out the two items above first.
Mike
Are you really having idling problems, as in, does it happen when the a/c is off? If so, that could be a vacuum leak (could also be other issues).
If it happens only when the a/c is on, as DeRocha mentioned, you may be experiencing the a/c clutch engaging/disengaging because you are low on freon. This would have nothing to do with a vacuum leak, but would be a sign that you have a freon leak.
Theoretically it's possible that you have no freon leak, and that the idle is goofy only when the a/c is running and putting additional load on the engine, but I would rule out the two items above first.
Mike
its constintly running like that when idling.....i dont have the a/c ever on because it doesnt work! previous owner didnt really care i guess... the explorer is mostly for off-road and going to be my winter vehicle so its not a big deal about the a/c.
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