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Registered
Join Date: Dec 2001
Location: Cordova, TN
Posts: 1,222
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Timing or Fuel Injection?
I thought I had a fuel injection issue at first but now I am not sure.
The car was running lean. I did a CIS pressure test and the WUR was out of spec. I relpaced the WUR and the fuel filter and the car did run a little better but the problem was not solved. One of the most irratating symptoms is a stunble durring acceleration, and a poping from the exhaust. I got a chance to tune the car today and playing with the timing made the bigest difference. I am not sure if I was advancing or retarding the timing. But turning the distributor counter clockwise about 15 to 20 degrees eliminated the problem. I settled for 10 degrees and the car runs ok but not great. After a drive the car began to run hot and power went away. The temp guage was on the edge of the red zone. I will run an injector, and compression test next weekend. Does anyone think this could be a valve isse? Possibly a valve timing issue? I had the timing belt changed at the shop about 8K ago so it should be ok, but could the belt have skiped a tooth? What about the loos of power while hot? Does anyone think it could be a head gasket issue?
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Roger Hall 81 924 N/A Some people are like Slinkies. Not really good for anything, but you still can't help but smile when you see one tumble down the stairs. |
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10-26-2003, 03:11 PM
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Join Date: Aug 2003
Location: Madrid,Spain
Posts: 728
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Had you retensioned the timing belt? if not,could be the problem.
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--------------------------------------------- 85´5 951 |
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10-26-2003, 10:33 PM
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Line up the marks and check it. You may not be getting a proper advance on the dist. Still uses the vacuum right?
Seem to recal when I was driving a 924 (not a turbo) that the older performance VW dist. guts would fit in the 924. Guts = swash plate and counter weights for a better advancement curve.
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Hugh - So Cal 83 944 Driver Person NOT a 'real' Porsche -- Its Better!!!! When was the last time you changed your timing and balance belts and/or cam chain and tensioner? New Users please add your car's year and model to your signature line! Never break more than you fix! |
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10-27-2003, 07:34 AM
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Join Date: Dec 2001
Location: Cordova, TN
Posts: 1,222
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Manute:
IIRC the early 924's do not require retensioning the timing belt. However I am leaning towards a timing belt issue. SoCal Yes its vacuum advance. The distributor advance is somthing I had not thought of. I have a spare distributor and I will test it out.
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Roger Hall 81 924 N/A Some people are like Slinkies. Not really good for anything, but you still can't help but smile when you see one tumble down the stairs. |
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10-27-2003, 07:01 PM
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Join Date: Aug 2003
Location: Madrid,Spain
Posts: 728
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Quote:
Before entering Pelican i tought i have a little idea about cars.... 
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--------------------------------------------- 85´5 951 |
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10-28-2003, 01:36 PM
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Join Date: Jul 2000
Posts: 5,732
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If your belt skipped a tooth, the Ign Timing would also be off. A skipped tooth could be a posibility.
drew1
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drew1 wife has 924 turbo |
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10-28-2003, 04:24 PM
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1983 Porsche 944 2.5 liter
