87 944 N/A runs badly - RESOLVED
12-27-2007, 09:56 PM
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87 944 N/A runs badly - RESOLVED
Well after 8 wks, I finally get the clutch replaced [long story why it took so long] but now the she seems to backfire and at times misfire to the point where its like a dead zone. This is most noticeable at low rpm and causes a rough idle that eventually stalls the engine. When the rpm gets above 2500 the issue is not so noticeable, but I can tell it's just not running right.
The engine was running perfect before I started the clutch replacement. The speed/reference sensors appear to be installed & ok; i have no reason to suspect these yet.
Anyway, I am happy for the new clutch but I now I have a new issue. Anyway, hints and advice welcomed to help diagnose this one.
thank
The engine was running perfect before I started the clutch replacement. The speed/reference sensors appear to be installed & ok; i have no reason to suspect these yet.
Anyway, I am happy for the new clutch but I now I have a new issue. Anyway, hints and advice welcomed to help diagnose this one.
thank
Last edited by jefffery; 12-28-2007 at 06:51 PM. Reason: Resolved
12-28-2007, 11:57 AM
#2
Check your plugs and wires ! make sure the porcelan on the plugs is CLEAN and your wires are not arcing somwhere. I had the same problem, went to my 944 guy. He pulled the plugs to see how they were burning, cleaned the porcelan, put them back in..... ran fine !
12-28-2007, 12:27 PM
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Welcome Jeffery,
Check the connections and test the reference sensors. Even if you feel they are ok, reset. I changed my clutch on the 1988 in Oct. I was afraid to lose the washer glued to the reference sensor and have to take it apart to fish out the washer. I used a tiny drop of 2 part instant epoxy. Make sure the flywheel pins are at bottom of clutch. Review Clarks-Garage http://www.clarks-garage.com/shop-manual/ign-02.htm. Check the thickness of the washer.
It's a holiday, tell us your long story about the clutch replacement. I spent 4 hours getting the pan head bolt off of the sensor bracket because I rounded the hole with a dull hex.
Good luck,
John_AZ
1988 924S + 1987 924S
Check the connections and test the reference sensors. Even if you feel they are ok, reset. I changed my clutch on the 1988 in Oct. I was afraid to lose the washer glued to the reference sensor and have to take it apart to fish out the washer. I used a tiny drop of 2 part instant epoxy. Make sure the flywheel pins are at bottom of clutch. Review Clarks-Garage http://www.clarks-garage.com/shop-manual/ign-02.htm. Check the thickness of the washer.
It's a holiday, tell us your long story about the clutch replacement. I spent 4 hours getting the pan head bolt off of the sensor bracket because I rounded the hole with a dull hex.
Good luck,
John_AZ
1988 924S + 1987 924S
Last edited by John_AZ; 12-28-2007 at 12:30 PM. Reason: spelling
12-28-2007, 06:46 PM
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87 944 N/A runs badly -- Resolved
Thanks everyone!
It was late last night when we finally got the clutch together and discovered the engine was running bad; so this morning I went back to the sensors and discovered my buddy [ was until now
] had clobbered the mark sensor connector where it plugs into the harness. End result -- the ground wire and the black wire were connected in reverse into the harness. I only noticed this b/c the reference sensor was not busted in a million pieces and the wire order did not match. So with nothing to loose, I cleaned up the connection, added heat shrink tubing for insulation around each wire, plugged the wires into the harness connector like the other sensor, and BAM -- she now runs as smooth as ever.
For now I just want to drive my car, later I will order the BMW or lindsey sensor as a replacement.
Thanks everyone,
Jeffery Concord NC
email: jhausler@carolina.rr.com [sure would like to know if any 944 folks are in my area]
PS. To close this thread. I had an issue with the clutch replacement. We had to go back in and replace the clutch release lever b/c one fork was bent and not squarely resting on the throw-out bearing. Did not notice this the first time but we new something was wrong b/c I could not shift gears and the car would creep forward at a stop sign. oh well, got a used fork for $209 and all is just fine.
It was late last night when we finally got the clutch together and discovered the engine was running bad; so this morning I went back to the sensors and discovered my buddy [ was until now
] had clobbered the mark sensor connector where it plugs into the harness. End result -- the ground wire and the black wire were connected in reverse into the harness. I only noticed this b/c the reference sensor was not busted in a million pieces and the wire order did not match. So with nothing to loose, I cleaned up the connection, added heat shrink tubing for insulation around each wire, plugged the wires into the harness connector like the other sensor, and BAM -- she now runs as smooth as ever.For now I just want to drive my car, later I will order the BMW or lindsey sensor as a replacement.
Thanks everyone,
Jeffery Concord NC
email: jhausler@carolina.rr.com [sure would like to know if any 944 folks are in my area]
PS. To close this thread. I had an issue with the clutch replacement. We had to go back in and replace the clutch release lever b/c one fork was bent and not squarely resting on the throw-out bearing. Did not notice this the first time but we new something was wrong b/c I could not shift gears and the car would creep forward at a stop sign. oh well, got a used fork for $209 and all is just fine.
