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1994 Oldsmobile Bravada

Tiny
RKANSAWANGEL_29
  • MEMBER
  • 1994 OLDSMOBILE BRAVADA
1994 Oldsmobile Bravada 6 cyl All Wheel Drive Automatic

Went to go to feed store and car started to cut out, we got back home and it would not run, start it and it would die. Have changed the map sensor, the egr control solenoid, the idle position control sensor, the distributor cap, and rotator bug, plugs and plug wires. Also replaced the fuel pressure regulator and the injectors in the throttle body, also replaced the coil. The vechile is still not wanting to run. You can start it but it will not idle. If you unplug the map sensor it will idle but can not drive it. Not sure what else to try and really like the vechile hate to junk it now with all the money we have already sunk into it.
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Wednesday, March 11th, 2009 AT 11:32 AM

13 Replies

Tiny
JACOBANDNICKOLAS
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Hi:
Check closely for vacuum leaks at the intake. These have a history for intake leaks. Also, have you checked to make sure the catylatic converter isn't partially plugged? Has the check engine light ever come on?
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Wednesday, March 11th, 2009 AT 9:43 PM
Tiny
HELPING YOU
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On Ford a bad Mass Air Flow sensor does this. Do you mean MAF, not map or does chevy not use maf? There's an adapter you put in place of filter and attach guageto check fuel pressure.
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Wednesday, March 11th, 2009 AT 10:02 PM
Tiny
RKANSAWANGEL_29
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No the catylatic converter is not plugged up and as far as I can tell there are no vacum leaks. But today I did notice that when the key is turned on the fuel pump does not sound right. There is this hissing sound that comes from the tank area. Dont know if that will help or anything.
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Thursday, March 12th, 2009 AT 12:02 AM
Tiny
JACOBANDNICKOLAS
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Hi:
I would check the fuel pump pressure. Here is a how to video:
https://www.2carpros.com/dia/test_fuel_pressure.htm

Let me know what you find. also, the gauges can be rented at many parts stores or you can purchase one at the Test Equipment Store site on this page.
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Thursday, March 12th, 2009 AT 1:18 PM
Tiny
RKANSAWANGEL_29
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This is a throttle body and I can not find the place to do the pressure test. But I was wondering could it be the fuel pump or the relay and if it is the relay where would it be located.

Thanks so far for the help it is much appericated.
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Thursday, March 12th, 2009 AT 1:46 PM
Tiny
JACOBANDNICKOLAS
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Hi:
The relay should be in a power distribution box under the hood with other relays.

Let me know if you find them. If not, I will try to find an exact location in one of the manuals.
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Thursday, March 12th, 2009 AT 7:36 PM
Tiny
RKANSAWANGEL_29
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Am not sure where the relay is but I was wondering if you could tell me what way the rotar bug should be facing when the timing is right. And could the distributor possible be bad. There seems to be plenty of gas getting into the throttle body injectors.
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Friday, March 13th, 2009 AT 5:10 PM
Tiny
JACOBANDNICKOLAS
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Here is a diagram of the timing and rotor.


https://www.2carpros.com/forum/automotive_pictures/249084_fire_1.jpg



It could be the distributor, but I doubt it. I would be more focused on the ignition module in the distributor.
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Friday, March 13th, 2009 AT 11:34 PM
Tiny
RKANSAWANGEL_29
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Is there a plate that covers the ignition module and if so how does it come off. And could a fuel pump get weak or will it just stop working altogher. I am really hoping to get it fixed cause I really love the vechile and again thank you for all you help so far. You have helped me find things I was not sure about.

I went to see if I could figure out how to remove the ignition module and when I removed the distibutor cap it was burnt. So dont know if this will help to figure anything out or not.
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Saturday, March 14th, 2009 AT 1:59 AM
Tiny
JACOBANDNICKOLAS
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Hi:
Yes a fuel pump can get weak. I was thinking about this problem and I believe the 1994 was a transition year from an ignition module to a pick up coil and a crank sensor.

If yours has the module, it will be mounted to the intake. Also, have you checked for spark? Also, what do you mean by the distributor cap was burnt?

NOTE:
If you are getting spark to the plugs, the module is most likely good. Also, I want you to check on the timing chain cover to see if there is a crank sensor on your car. This was a transition year and I'm not sure exactly which ignition you have. It will be based on when the car was built.

Joe
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Saturday, March 14th, 2009 AT 1:20 PM
Tiny
RKANSAWANGEL_29
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Yes it is getting fire and when I said the cap was burnt I meant that it was black where the coil hits the rotator bug. I also know that this has the pick up so does that mean that it has the crank sonsor. If the crank sensor was out would it fire at all. I cannot find the crank sensor if there is one. I know that there are sparks and it looked like good ones but I can not understand why when you unplug the map sensor it will idle but will not run in gear. When the map sensor is plugged up it is like it is being flooded out. Thanks for the help.

Angel
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Monday, March 16th, 2009 AT 10:17 AM
Tiny
JACOBANDNICKOLAS
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Hi:
Yours must have the pick up coil and not the crank sensor. If it did have it and it was bad, you would get no spark. It sounds like the map sensor is the problem.
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Monday, March 16th, 2009 AT 2:21 PM
Tiny
RKANSAWANGEL_29
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Brand new one just got it we just pulled the pump and we have put three others ones besides the new one on it
so I am off to the parts store for the fuel pump dont know if this will help.
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Monday, March 16th, 2009 AT 2:46 PM

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