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Car Forum / Porsche / Porshe 944 / April 2005944S Help
I just today got the chance to test out what is possibly wrong with my car. My last posts i have explianed that i bought the car and the guy said he was driving it and it just shut off and wouldn't start again. What i have checked is the following: Engine turns over Spark is found at the distrubutor Everything electirical seems to be working There is fuel in the fuel rail Fuel pump is pumping Throttle is working It turns over but doesn't make an attempt to fire, just cranks and cranks. If there are any other possibilities such as the alarm or cam's not working please elaborate. Thanks do you have compression? are you sure the timing is OK? a quick compression check will tell you everything you need to know, I suspect, particularly if the car is cranking unusually fast. > I just today got the chance to test out what is possibly wrong with my car. > My last posts i have explianed that i bought the car and the guy said he [quoted text clipped - 11 lines] > If there are any other possibilities such as the alarm or cam's not working > please elaborate. Thanks William If the car would move in gear while cranking it over, as in i cranked it over while in first gear, wouldn't it have plenty of compresion? and how do i exactly check my timing. I'm going to replace the distributor and sparkplugs and cables. Is there any other possibilities? Get a gauge and check the fuel pressure at the rail. 25-35 psi If you are seeing spark in the plugs then ignition is not the problem. The computer controls the timing. NO, there is no relation between the existance of compression and whether the car moves in first gear - buy, borrow or rent a compression tester. If you measure 0 on all cylinders, you have no compression and you know what your problem is. Timing - to check timing, verify that the timing mark on the cam (on the S, it's at the back of the pulley seen through a plug in the top) is aligned with the mark when the OT on the flywheel is aligned with the timing pointer. > William > > If the car would move in gear while cranking it over, as in i cranked it > over while in first gear, wouldn't it have plenty of compresion? and how > do i exactly check my timing. I'm going to replace the distributor and > sparkplugs and cables. Is there any other possibilities? Your problem is very similar to mine but I went as far as changing the fuel pump, dme relay, ignition wires, coil, distributor caps and all the fu. What you need to check is your coil, if you coil receive power but does not output anything to the distributor this may be caused by a couple of things: -Faulty speed sensor and Reference Mark sensor (both located above the bell housing) -Your DME unit is faulty. I would definately check the sensors because they have a bad reputation of going on the fritz for no reasons. Good Luck Stephan note that the S also uses a hall effect sensor on distributor that the NA doesn't use > Your problem is very similar to mine but I went as far as changing the fuel > pump, dme relay, ignition wires, coil, distributor caps and all the fu. [quoted text clipped - 11 lines] > > Stephan Is this running yet? Just had a similar problem with 944 NA that turned out to be fuel regulator. Pump and spark were OK, but regulator was bad. $50+ later, it's run fine (till I started on the clutch job from hell) |
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