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Re: 733i car cranks but will not start Help (archive)
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Posted by Larry Duckett on December 04, 2000 at 19:04:26:

In Reply to: 733i car cranks but will not start Help posted by lg on December 02, 2000 at 14:17:56:


when i turn the key it cranks, and sounds like it wants to start then it goes to just cranking. any suggestions on what i can do. my car is 1980 733i

thanks


I had similar problems during engine / drive train restoration on a 79 733i. Several thing could be a problem. 1: ensure cold start valve is working, nearly impossible to start cold engine without it. 2: check for spark coming from first the coil to chassis ground during starting then second check spark at #1 spark plug. 3: check the fuel coming from the fuel pump[s] to the injector pressure rail. 4: Check resistance of all sensors temp, time delay. I have tried different relays but found they usually o/k and very robust and any fault is accompanied by a burnt-out condition {physically melted or burnt}. These are the basic's I used to get a refitted engine to start running


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