Revolution sensor bypass

Hi guys,


First real post here. I've researched this AC problem and found a few answers, but the threads are usually a few years old. Im curious if any new information has come to light in the interim.

Car Info: 1996 VR4, 165K Miles
All electronics in the car work.
`
The compressor light in the DCC panel stays on for about 10-20 seconds when the engine is started and blows cold air. After 10-20 seconds the red light comes on and I'm back to untreated air. Blower is fine. The mechanic I took the car to said the compressor is fine, that the revolution sensor is the problem. New compressor was ordered, but the sensor was not included in the unit and it's been impossible to track down the sensor, or a compressor which comes with the sensor.

I've gathered there are two possible solutions.

1) Jump the green wire/yellow stripe/silver bands to the green wire/red stripe/silver bands. Red dot stays on, compressor runs as normal.(turns on/off as it should)

2) Cut the white wire which sends the RPM signal. Red dot turns off?

Does anyone have a more detailed explanation I can give to the mechanic?

Are these my only options? Are there any advantages/disadvantages to either system? I have a parts store trying to find a compressor with a sensor, but if I can't I'm just going to have the mechanic try this bypass.

Thanks!

Wrecking yard is the easiest way to fix. Jim has messed with thes a bit, maybe he will poke his head in.

:inout: lol

Quote:

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Originally Posted by JBled85

Hi guys,


First real post here. I've researched this AC problem and found a few answers, but the threads are usually a few years old. Im curious if any new information has come to light in the interim.

Car Info: 1996 VR4, 165K Miles
All electronics in the car work.
`
The compressor light in the DCC panel stays on for about 10-20 seconds when the engine is started and blows cold air. After 10-20 seconds the red light comes on and I'm back to untreated air. Blower is fine. The mechanic I took the car to said the compressor is fine, that the revolution sensor is the problem. New compressor was ordered, but the sensor was not included in the unit and it's been impossible to track down the sensor, or a compressor which comes with the sensor.

I've gathered there are two possible solutions.

1) Jump the green wire/yellow stripe/silver bands to the green wire/red stripe/silver bands. Red dot stays on, compressor runs as normal.(turns on/off as it should)

2) Cut the white wire which sends the RPM signal. Red dot turns off?

Does anyone have a more detailed explanation I can give to the mechanic?

Are these my only options? Are there any advantages/disadvantages to either system? I have a parts store trying to find a compressor with a sensor, but if I can't I'm just going to have the mechanic try this bypass.

Thanks!

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Seriously, I'm not sure the revolution sensor is the issue here. Try disabling the compressor and re-enabling it with the control buttons at the right of the display. I'll bet you can get the blue gear to reappear in place of the red one.

In my experience the compressor doesn't come with the manifold - it has a block off plate instead and you have to re-use the manifold that came with your original compressor. But note that the new compressors don't even have support for the rev sensor in the casting where it needs to be notched out.

My solution was to use the body of the old compressor and the guts of the new one.

http://www.3sgto.org/turbo-engines-s...tml#post249900