Quote:
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Originally Posted by Rick Miley
The 87 has an RPM sensor on the compressor, and the Klima relay compares that to engine rpm. If the Klima detects a difference, it will disengage the clutch until the engine is shut off and restarted. This is to prevent a seized compressor from taking out the serpentine belt and leaving you stranded. So if your system is working fine for a few minutes and then shuts off, it is likely a slipping belt, faulty sensor, or Klima relay - not the PBU.
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Hmmmm... makes sense.
Where is the Klima relay located?
I have been experiencing strange Tachometer readings for a while that will change by about 800rpm from time to time. The Tach works fine (smooth and linear) but the reading reads low sometimes. About 2300rpm @ 80mph instead of the expected 3100rpm. I had put this down to a faulty tach amplifier, but could I have a bad sensor instead? If so where do I look?
The Belt is fairly new along with the tensioner and there are no signs of slippage.