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1983 944 Intermittent Start Problem


Vehicle Information: Model(924/944): 944; Year: 1983; Engine (type, size, modifications): 2.5L, FI, Manual 5 speed; Total Mileage: Not sure speedo/odo was inop, think about 80K;

Intermittently my 83 944 does not want to start. It seems depending on my state of urgency, if it's a bad time to act up she won't start. I can wait about 5 to 10 minutes and try again, and usually she starts. Seems to happen cold or hot. The engine turns over strong. I changed most components, including new starter, battery, distributor cap, rotor button, spark plugs, DME relay, reference and speed transmitters . When I see no deflection on the Tach, I know she won't start (should be about 500 rpm during start sequence). Checked DME, harness, start switch, and DME relay socket. I suspect my DME has a problem. Can I get the Bosch 944.618.111.01 DME schematics, it seems that sometimes the DME won't pass post and initialize. I've opened the DME and everything looks good/nothing obvious. I could figure out what's wrong and fix this DME rather than just replace it. Another symptom maybe between 3 and 5K rpm there is noticable hesitation on acceleration.

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