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924/931/944/951/968 Forum Porsche 924, 924S, 931, 944, 944S, 944S2, 951, and 968 discussion, how-to guides, and technical help. (1976-1995)
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Old 10-21-2003, 04:12 PM
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aribop
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Got a ride to my house and picked up a spare DME relay. Went to my car and put it in. Still nothing. I know this relay is good, so back to square one. It really sounds like a starter problem. It just doesn't sound right ( yes, that is the technical language). Is it possible that the starter can turn the engine over but not fast enough to get it to crank?
Any ideas would be great.
Thanks guys.
Old 10-21-2003, 04:17 PM
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SoCal Driver
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When was the last time you changed the cam chain or the timing belt?
Old 10-21-2003, 04:27 PM
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At 105K miles. Car now at 130K. I just changed the balance belt because it jumped a couple of teeth due to the outside plate on the top belt gear had somehow gotten in a fight with my timing cover. Anyway. readjusted timing belt tensioner at that time (belts cold) and everything looked fine. Have not taken the valve cover off to look at the chain but I'm hoping it's O.K.
Old 10-21-2003, 04:30 PM
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This doesn't sound good.
Old 10-21-2003, 04:37 PM
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25,000 miles ago. Did you change the pressure pad and chain at that time?

Reason I'm asking is your remark about the engine turning over different than it has.

Another thing to check is the ignition module. This has a nasty tendency to just quit. It's an interface between the DME and the coil. Get a spare spark plug, pull one of the plug cables and plug it in. Lay the plug across the valve cover so it gounds and crank the engine. If there is no spark then it could be the ignition module, reference sensor, loose rotor and yes a broken timing belt.
Old 10-21-2003, 04:39 PM
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OriginalSterm
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Crank position sensor?
Old 10-21-2003, 04:44 PM
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I know for a fact the timing belt is not broken. I pulled the rubber plug on the cam sprocket cover and can see the belt turning the cam sprocket when the engine is cranked.
Old 10-21-2003, 04:45 PM
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Original: where is the crank position sensor? My car only has one reference sensor. Is this what you are refering to?
Old 10-21-2003, 04:45 PM
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Originally posted by OriginalSterm
Crank position sensor?
I guess that the single sensor is called that.

Really trick idea but you need the added "teeth" on the flywheel.
Old 10-21-2003, 04:46 PM
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SoCal: the work was done by a certified Porsche mechanic that the PO used. Looking at the work order it looks like the cam pads were replaced.
Old 10-21-2003, 04:47 PM
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Spark? Could have a loose rotor.
Old 10-21-2003, 04:53 PM
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Rotor was tight when I replaced the balance belt. I did notice when I went to try the DME relay that the hall effect plug was brittle and cracked and missing part of it. The wires are still connected though. Any thoughts?
Old 10-21-2003, 04:58 PM
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The plug to that sensor came loose on my car (the clip went missing somehow) and the car would crank and crank and crank and nothing would happen. Electrical tape and 5,000 miles later, my car still starts and runs.

Located on the back side of the engine compartment, behind the engine.
Old 10-21-2003, 05:03 PM
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I'm not sure the ignition control module could be the culprit, because it doesn't generally die all of a sudden, but rather slowly craps out, making the idle and acceleration erratic. The car bucks, etc.

Unless the starter is making a really bad sound, it could still be your alarm control module causing the problem. Does the starter grind that badly?
Old 10-21-2003, 05:08 PM
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Luis: The starter just sounds like its spinning without the gear engaged. But that cannot be the case because it is turning the engine over. I made it a point to see if the led's in my door locks were flashing when I locked the car and they were. Should I assume the alarm control module is working?


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