Question about Oldsmobile Bravada

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1994 Bravada 4.3 won't start

Hi guys:

I have a 1994 Bravada 4.3 CPI Engine - Vin W, 135,000 miles on it. I own the car about 4 and a half years and is used mainly as a 2nd car and in winters. (4 wheel drive vehicle) About 3 months ago I was driving from Pa to NY, about 120 miles each way. It is mainly highway driving. I was near my destination on the highway, when it stalled out on me. I pulled over and it started right up. Then after I got off the highway, it started to stall out by every light and stop sign, and again it started right up each time.

On my way back home about 6 hours later, again it was doing the same thing. Once I got to the highway it ran fine for a about 105 miles. Once I got to my exit on the highway and got off, the car stalled out again. This time it would not start up. So I had it towed back to my house. The next day it started right up. I shut it off and I went to buy new spark plugs, distributor cap, rotor, ignition coil, PCV valve, and fuel filter. I had the fuel pump changed in May of 2005 (about 15,000 miles ago) The fuel pressure is 58 with IOEO. It still does not start. I do not have any engine light on.

I went to a salvage yard where you pull your own parts. I got a used Map sensor, IAC sensor, TPS sensor, EGR valve, CPI unit and a computer. It was from a vehicle that was in an accident. I changed parts one at a time. It still won't start. I checked the oil, I do smell gas in it. I know that means that there is a leak somewhere. I'm not sure what that means nor how to look for that?

I also read in your posts that it could be the Crankshaft Position Sensor. I have the Haynes repair manual and it does not mention anything about it. Can any one please tell me where it is and be specific about it and is it hard to change? Can someone also tell me if you could start the car with the Air intake plenum off the car, or does it have to be on and under pressure?

Thanks for all your help.

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  • gg1328 Jul 22, 2008

    Dear Accordianman:

    I changed the entire CPI unit with a used one from a car that was in an accident from a salvage yard. Car still won't start. Then I put my old CPI unit back in, and just replaced the fuel injector. Still car won't start. Any other ideas?


  • iamstonefree Aug 21, 2008

    Won`t start.Only when I pour gas in throttle body.Then it stays running.Changed pump and filter.

  • Anonymous Sep 27, 2008

    same problem. idles fine and runs like a top until it gets above 125degrees. then you loose throttle and it misses and won't run.



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Check for a leaking fuel injector. It could be desperately flooding the engine under certain conditions...accordianman

Posted on Jul 22, 2008


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