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2000 firebird oil pressure dropped and stalled while driving

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New User

Jan 1, 2014, 3:31 PM

Post #1 of 2 (1192 views)
2000 firebird oil pressure dropped and stalled while driving Sign In

After some local flooding I drove through quite a bit of water covered roadway (at least a mile) with my 2000 3.8L V6 pontiac firebird without stalling. The next day it started roughly but ran as usual until while driving about 30 MPH my oil pressure gauge dropped to 0 and the car stalled. Had the oil changed at walmart the week before and there is oil in the pan and in the filter. We've replaced the fuel filter,battery is good and no loose connections or corrosion. Replaced oil pressure sensor switch and tried resetting the antitheft system. Gauges surge when key is on and it will turn over but not start. Battery seems to be draining rapidly as well... please help?????

Hammer Time
Ultimate Carjunky / Moderator
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Jan 1, 2014, 3:40 PM

Post #2 of 2 (1189 views)
Re: 2000 firebird oil pressure dropped and stalled while driving Sign In

 All "crank, no start" conditions are approached in the same way. Every engine requires certain functions to be able to run. Some of these functions rely on specific components to work and some components are part of more than one function so it is important to see the whole picture to be able to conclude anything about what may have failed. Also, these functions can ONLY be tested during the failure. Any other time and they will simply test good because the problem isn't present at the moment.
If you approach this in any other way, you are merely guessing and that only serves to replace unnecessary parts and wastes money.

Every engine requires spark, fuel and compression to run. That's what we have to look for.

These are the basics that need to be tested and will give us the info required to isolate a cause.

1) Test for spark at the plug end of the wire using a spark tester. If none found, check for power supply on the + terminal of the coil with the key on.

2) Test for injector pulse using a small bulb called a noid light. If none found, check for power supply at one side of the injector with the key on.

3) Use a fuel pressure gauge to test for correct fuel pressure, also noticing if the pressure holds when key is shut off.

4) If all of these things check good, then you would need to do a complete compression test.

Once you have determined which of these functions has dropped out,
you will know which system is having the problem.


We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.

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