1994 Oldsmobile Bravada Won't Start

1994 OLDSMOBILE
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BPARK
  • MEMBER
  • 2 POSTS
94 olds Bravada, 4.3liter vortec engine, 130,000 miles was running fine. Started right up one morning and I shut it off when I got to my destination. Went to start it back up and it wouldn't. It would crank but wouldn't turn over. Had it towed to mechanic where he replaced the fuel filter, fuel pump, spyder, spark plugs, distributor, fuel intake lines, cut exhaust by catalytic converter cause he thought it might be clogged, it was fine. welded it back together. Drove it for a day and the weld came apart. Took it back to mechanic where he re-welded it back together. On my way home it started sputting and spurting, made it to my driveway where it died. Called mechanic and we thought maybe something got clogged where it was welded so I cut it apart, then it started but wouldn't stay running. About 2 hours later it started so I drove it to my mechanic but it died halfway there. He is at his wits end cause he said when it is in his garage it starts but as soon as it is out in the cold it won't. Some of the days that it wouldn't start when it was outside it wasn't below freezing. We are going to try dry gas but what else could it be?Help please!!
Jan 27, 2007 at 10:59 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
[quote:592fcc6173="bpark"]94 olds Bravada, 4.3liter vortec engine, 130,000 miles was running fine. Started right up one morning and I shut it off when I got to my destination. Went to start it back up and it wouldn't. It would crank but wouldn't turn over. Had it towed to mechanic where he replaced the fuel filter, fuel pump, spyder, spark plugs, distributor, fuel intake lines, cut exhaust by catalytic converter cause he thought it might be clogged, it was fine. welded it back together. Drove it for a day and the weld came apart. Took it back to mechanic where he re-welded it back together. On my way home it started sputting and spurting, made it to my driveway where it died. Called mechanic and we thought maybe something got clogged where it was welded so I cut it apart, then it started but wouldn't stay running. About 2 hours later it started so I drove it to my mechanic but it died halfway there. He is at his wits end cause he said when it is in his garage it starts but as soon as it is out in the cold it won't. Some of the days that it wouldn't start when it was outside it wasn't below freezing. We are going to try dry gas but what else could it be?Help please!![/quote:592fcc6173]

Check the EGR when iit stuck open it will create a huge vacuum leak-also if it has a Crankshaft Position Sensor check that and the module.
Jan 29, 2007 at 8:48 PM

Suggested Repair

Check the EGR valve for sticking open, which can cause a large vacuum leak. Also test the crankshaft position sensor and the ignition control module.

Conversation Summary

A 1994 Oldsmobile Bravada with a 4.3L Vortec cranks but will not start or stay running, especially outside in the cold, after running fine earlier. The mechanic replaced the fuel filter, fuel pump, spider injection assembly, spark plugs, distributor, and fuel lines, and cut and rewelded the exhaust near the catalytic converter, but the intermittent no-start and sputtering continued. The expert recommends checking for a stuck-open EGR valve and testing the crankshaft position sensor and module.

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