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Old 04-06-2015, 09:56 PM   #1
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Default 1992 Olds 98 Driving Me INSANE Now FLOODING

I have a 92 Olds 98 with 80k on it. It has the 3.8 NA engine in it, level ride, and the electronic ac control. The other day I was driving and it died on my I kept trying and trying to restart it finally after a few minutes it did. It was fine for about a week. Then easter sunday I went to the bakery came back home parked it and then about a half hour later I went out to start it and it fired right up got to the top of the drive way and died. I got it restarted and it started reving itself to up and down, then just held high rpms and then died. I checked under the hood and we have spark on all 6 coil terminals while cranking. I assumed it was a lack of fuel, I called the auto parts store and ordered a cam sensor. It came today. But before I installed it I decided to see what would happen if I canked it It didnt start, then I held the gas pedal to the floor to try a clear flood, after a lot of cranking the car started and ran fine. I shut it down and put the cam sensor in anyway, after installing it it ran good again. I shut the car off about an hour later I tried to start it and it wouldnt start. I tried putting the pedal to the floor got it to start but if I didnt keep it almost floored at high rpm it would die. Finally I let off and it stalled. When it did the check engine light was flashing and so was the "HOT" light. After that I tried starting it one more time and it would just studder but not start. Also I noticed when you turn the ignition on and all the bulb tests come up, the check engine light comes on and goes out so fast if your not loking for it you wont see it. Usually it stays on until the car is cranked. Also I tried shorting pins A and B on the ALDL to see if I could get some blink codes and the check engine light wouldn't come on or blink. Do I possibly have a bad ECM? I hate to condemn it for no reason.

About a month ago I replaced the magnivox ignition coils and module, also tuned it up, now I also replaced the cam sensor.
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Old 04-07-2015, 06:39 PM   #2
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I bought a fuel pressure tester today, the car has 50psi with the ignition on car not running, and during cranking. I couldnt get the car to start and idle, but if I revved it up and down I could get it to run, and fuel pressure when up and down with RPM so the fuel pressure regulator seems to be working.

I also hooked up noid lights and have steady injector pulses.

I tried unplugging sensors one at a time to see if the car would start. I tried the MAF, IAC, and TPS and the car didnt start with any of them unplugged.

Any Ideas?
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Old 04-10-2015, 02:57 PM   #3
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If you can't get flash codes, there is a chance there is an ECM problem....could be a wiring problem too.....

I assume you tried to start the car with the MAF disconnected?

You say fuel pressure is ok? Turning key on, pressure holds? And that spark is ok on all cylinders?

Try disconnecting the injector harness, and try to start car by spraying carb cleaner onto the throttle plate(you don't have to open it)....if it starts and runs as long as you spray, then you could have an ECM problem....

If it still doesn't start.......remove the plugs, and look for plugs that may be fouled with fuel......then check compression while all plugs are out....
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Old 04-19-2015, 09:51 PM   #4
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could this be a fuel regulator leaking off and flooding the system?
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Old 04-20-2015, 12:42 AM   #5
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If it was, fuel pressure would drop after the fuel pump shut off, which it should after the initial prime at key on. There was no mention however if it held or dropped.
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