You have to buy or borrow a compression gauge tester. It threads into the spark plug hole; so you pull all the plugs out, then check each cylinder's compression. The proper way is to first disable gas and spark, put the tester into the first cylinder, then crank the engine over a set number of times- the same amount of cranking for each cylinder, so all get a balanced test. While cranking, hold the accelerator pedal all the way to the floor-this lets the engine breathe normally, getting all the air available. then compare your compression readings: a good healthy engine will have all cylinders pretty even, in the range of somewhere between 150 psi-200 psi. Low compression readings means compression is being lost somewhere, like worn piston rings, bad head gasket seal, or valves not sealing.
Wondering if you have any compression at all? Hold your finger over a spark plug hole while someone briefly cranks the engine over. You can tell if there's any compression at all-you will feel the pressure build up under your finger. Rent or buy the gauge tester to get a true reading of your compression.
SOURCE: porsche 944 electric fan keeps running even when ignition is turned off
Replace the cooling fan relay, another person had the same issue, that's waht it was.
SOURCE: 1985 944 porsche speedometer stop working
First place to look is behind the dash. Its unlikely to be the 'sensor', as its a cable driven speedo...this would suggest the dashboard panel is falling to bits...you may be able to pick up a scrap on from somewhere...
SOURCE: 1985 Porsche 944 vibration in engine
It is a common problem for the seals in the oil cooler to leak and allow water into the oil. I'd check this first, there should be a procedure online somewhere. Try googling "clarks garage"
SOURCE: '87 Porsche 944 Turbo Airbag Light blinking incl. the "!" on dash
check the abs pump fuse .the abs pump or a sensor could trigger it. get a scan done...the code will tyell you what is wrong
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