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Throttle Position Sensor & AC

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Old Jul 3, 2011 | 09:38 PM
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Throttle Position Sensor & AC

1999 4.0 Ranger .Could a faulty TPS effect my air conditioner .Truck runs good ,air works on an intermittent basis,compressor cycles on and off about every 10 seconds.Thanks in advance.
 
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Old Jul 3, 2011 | 11:59 PM
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You may be low on refrigerant if it cycles that often.

What makes you suspect the TPS? When the compressor starts, what happens to the idle speed of the engine?
 
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Old Jul 4, 2011 | 06:00 AM
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I 'll check the refrigerant ,engine speed increases very little ,hardly noticeable on the tach ,when the compressor kicks in.Thanks
 
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Old Jul 4, 2011 | 08:22 AM
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Could be low on R-134, or maybe a faulty low pressure switch, sounds like the IAC is working ok if it idles up when you switch the A/C on.

Is cooling wimpy?????

Any oily signs of a leak around any of the A/C line fittings, or the compressor????

The system refrigerant should be pumped out & recharged by the specified weight of R-134 listed on the under hood label, Don't use one of those products with a sealant in it.

Let us know how it goes.
 
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