Have no clue what is wrong!

2002 OLDSMOBILE ALERO
72,300 MILES • 6 CYL • FWD • AUTOMATIC
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JEN_SWEENEY25
  • MEMBER
  • 1 POST
My oldsmobile alero recently had a gas leak under the intake. My dad took off the intake and tightened the nut for the fuel line and stopped the leak. After putting everything back together where it should be we started the car. It started reving up to 5,000 rpms and then chugging and almost dying and back and forth until we shut it off. We were told by a shop to change the intake gaskets so we did problem still happens. When put into gear the car dies instantly. Any suggestions on what could be wrong?
Dec 28, 2010 at 8:29 PM
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ERNEST CLARK
  • ✓Experienced Mechanic
  • 1,730 POSTS
You may have a vacuum leak somewhere. You can use either a rubber hose of can of starting fluid to chase down the leak.

When using a hose, put one end to your ear, the other around the intake, throttle and hoses until you find the leak. If using a can of starting fluid, make sure the engine is cold, keep a fire extinguisher close by and spray it very sparingly. If you hear the idle go up after spraying a spot, there's your leak.

Also, check Fuel pressure regulator for a leaking diaphragm. It's attached to the fuel rail and has a rubber hose attached. Pull hose and smell/feel for fuel. If there's any, replace it.

Finally, have the computer scanned for codes.
Dec 29, 2010 at 3:58 AM
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MHPAUTOS
  • ✓Experienced Mechanic
  • 31,937 POSTS
I agree, most probable cause may be a vacuum leak, i prefer the listening tube to locate any leaks, as the spry method can be dangerous, get the scan done as well, also just make sure all electrical plugs are re fitted, and anything you disturbed is as it should be.

mark (mhpautos)
Jan 1, 2011 at 4:09 PM
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