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2001 Oldsmobile Silhouette stalling out and not idling?

Tiny
JESSICA3637
  • MEMBER
  • 2001 OLDSMOBILE SILHOUETTE
  • 150 MILES
I have a 2001 Silhouette Oldsmobile that is stalling out and having troubles idling, it seems like. When I am driving around town, around 35 or 45 mph, the van will start to shake and sputter. Sometimes the exhaust will "pop". When this happens, the rpm's will jump up to 5000rpm and then drop fast down to 1000 or turn off completely. I have taken it to a mechanic and they have changed the fuel pump and the catalytic converter, then he says well maybe the gas gage it messing up. I need help! Still having the same problems, nothing has changed. Do not want to take it back to this MECHANIC!
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Monday, September 17th, 2012 AT 5:20 PM

5 Replies

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
How long since a tune-up? Any applicable trouble codes? Check anything that has to do with idle air system. Some of the national brand autostores will check codes for free. Or you can use an obd2 code reader. Are you handy under the hood?
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Monday, September 17th, 2012 AT 5:55 PM
Tiny
JESSICA3637
  • MEMBER
  • 3 POSTS
I got the van from my mother after my little brother blew a head gasket. I have had the motor rebuilt, the transmission worked on, the fuel pump replaced and the catalytic converter. I have not had a tune up yet. My husband is handy under the hood to some extent, but not an expert. There are no codes to check, the check engine light never comes on. It just sputters and then cuts off in the middle of the road and I am scarred to drive it.
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Monday, September 17th, 2012 AT 6:07 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
I understand. I always check for codes even if the lite isn't on.
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Monday, September 17th, 2012 AT 8:35 PM
Tiny
JESSICA3637
  • MEMBER
  • 3 POSTS
The same mechanic that has been replacing parts as he sees fit, is the one that told me that he couldn't check the codes if the light wasn't on. I should of known it was BS. I am trying to find a new mechanic to take it to, but I feel like I am getting stiffed every time I take it to a licensed mechanic! Someone suggested to check the mass air flow sensor, but I don't know where it is and neither does my husband.
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Tuesday, September 18th, 2012 AT 12:18 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
The maf sensor is in the duct-work that leads to the air-filter, left front of engine.

As far as codes, I've had inactive codes point me in the right direction. A lot of places won't check codes unless the lite is on.
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Tuesday, September 18th, 2012 AT 4:03 PM

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