Hesitation and stumble during acceleration

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12-16-2013, 06:43 AM

Jaystrucks2

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Join Date: Aug 2012

Location: NC

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Hesitation and stumble during acceleration

I have a 1998 V-6 that recently started to stumble while accelerating. I've replaced plugs and wires. Has codes P1131 and P0171. Any ideas appreciated.

12-16-2013, 12:42 PM

WhiteFoxGT

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Join Date: Jul 2006

Location: Delaware

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vacuum leak

could be a rotted/lose/disconnected line, intake gaskets, intake tube...etc..

12-17-2013, 08:26 AM

bigdogjoe

Join Date: Dec 2013

Location: New Jersey

Posts: 2

Check the O2 sensors.

12-17-2013, 09:02 AM

Jaystrucks2

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Join Date: Aug 2012

Location: NC

Posts: 12

Thanks for the info. Can you tell me which side of the engine is bank one? Driver or Passenger?

12-17-2013, 09:44 AM

WhiteFoxGT

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Quote:

Originally Posted by Jaystrucks2

Thanks for the info. Can you tell me which side of the engine is bank one? Driver or Passenger?

bank1 is passenger side, but the air leak could be anywhere. check and compare the 02s from bank1 to bank2, might not be an 02 sensor issue.

12-22-2013, 08:47 AM

Jaystrucks2

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Join Date: Aug 2012

Location: NC

Posts: 12

Took the air cleaner apart and found part of the outer sealing ring was warped. Replaced with new filter, cleaned MAF sensor and so far engine is not bogging down.
thanks for the suggestions.