Question about 2001 Oldsmobile Alero

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HI... Our 2001 Olds Alero has a problem with acceleration up hills. The tachometer goes up and down and the car gently speeds up and slows down during this. It mainly happens when going up a hill, or gently accelerating. We had a mechanic who tried changing the flash computer and put in new spark plugs. He said nothing is showing on their computer to tell them what is wrong with it. All filters have been changed and the transmission fluid was topped off. Any ideas? Thanks!

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  • Oldsmobile Master
  • 11,041 Answers

Clogged catalytic converter ! Have exhaust back pressure tested .

Posted on Jun 04, 2017

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Posted on Jan 02, 2017

  • 48 Answers

SOURCE: the car will not accelerate;

this sounds like 1 of 2 possible problems.
a bad headgasket or a clogged catalytic convertor. i would lean more towards the convertor

Posted on Jul 16, 2008

  • 169 Answers

SOURCE: 1994 olds 88

Sounds like the baffle in the fuel tank could be loose. I remember that problem on those when they were new. the only repair for that was/is to replace the tank. before you do that you should install a fuel pressure guage to it and test drive and watch the fuel press. it should stay above 35 psi. and even rise when accelerating if the fuel pressure regulator is ok. good luck.

Posted on Aug 30, 2008

  • 4 Answers

SOURCE: My 1999 alero sounds the engine is misfiring

2.4 liter OHC coil housings have this as a common failure. Thery arc over internally to another cylinder and cause the misfire.

Posted on Dec 27, 2008

  • 102 Answers

SOURCE: Jetta will not accelerate up inclines.

good chance you have a clogged cat converter ...with engine running have someone rev engine and see how much flow you have out tail pipe. also if you hear the sound of something rattling inside exhaust that is another tell tale sign

Posted on Mar 23, 2009

  • 1 Answer

SOURCE: 1987 350 cid TPI engine bogs when you accelerate

I've got a 91 Twin Turboed 355 that had same problem. I had my mechanic rejet the carb. It was running way too rich. That fixed that up in a jiff. Other than that, I'd recommend a full tune up. Maybe not FULL but new plugs, distributor, rotor, and def an o2 sensor.

Posted on Mar 24, 2009

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