1994 Oldsmobile Bravada

1994 OLDSMOBILE BRAVADA
Avatar
RKANSAWANGEL_29
  • MEMBER
  • 7 POSTS
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.
Mar 11, 2009 at 11:32 AM
Advertisement
Avatar
JACOBANDNICKOLAS
  • CAR REPAIR CONTRIBUTOR
  • 110,190 POSTS
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?
Mar 11, 2009 at 9:43 PM
Avatar
HELPING YOU
  • CAR REPAIR CONTRIBUTOR
  • 100 POSTS
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.
Mar 11, 2009 at 10:02 PM
Avatar
RKANSAWANGEL_29
  • MEMBER
  • 7 POSTS
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.
Mar 12, 2009 at 12:02 AM
Avatar
JACOBANDNICKOLAS
  • CAR REPAIR CONTRIBUTOR
  • 110,190 POSTS
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.
Mar 12, 2009 at 1:18 PM
Avatar
RKANSAWANGEL_29
  • MEMBER
  • 7 POSTS
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.
Mar 12, 2009 at 1:46 PM
Avatar
JACOBANDNICKOLAS
  • CAR REPAIR CONTRIBUTOR
  • 110,190 POSTS
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.
Mar 12, 2009 at 7:36 PM
Avatar
RKANSAWANGEL_29
  • MEMBER
  • 7 POSTS
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.
Mar 13, 2009 at 5:10 PM
Avatar
JACOBANDNICKOLAS
  • CAR REPAIR CONTRIBUTOR
  • 110,190 POSTS
Here is a diagram of the timing and rotor.


https://images.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.
Mar 13, 2009 at 11:34 PM
Avatar
RKANSAWANGEL_29
  • MEMBER
  • 7 POSTS
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.
Mar 14, 2009 at 1:59 AM
Avatar
JACOBANDNICKOLAS
  • CAR REPAIR CONTRIBUTOR
  • 110,190 POSTS
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
Mar 14, 2009 at 1:20 PM
Avatar
RKANSAWANGEL_29
  • MEMBER
  • 7 POSTS
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
Mar 16, 2009 at 10:17 AM
Avatar
JACOBANDNICKOLAS
  • CAR REPAIR CONTRIBUTOR
  • 110,190 POSTS
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.
Mar 16, 2009 at 2:21 PM
Avatar
RKANSAWANGEL_29
  • MEMBER
  • 7 POSTS
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.
Mar 16, 2009 at 2:46 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.