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service engine soon light , the codes say lean on bank one..fuel pump

 
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  • Answered by:Neal
  • Chevy Mechanic
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Customer Question

having problem with service engine soon light , the codes say lean on bank one and bank 2 , pluged injuctors or cat????? or fuel pump???

 

Country: United States
Make: Chevrolet
Model: Tahoe 4x4
Year: 1999
Engine: 350 vortx

Already Tried:
injector cleaner from GM AND SEA FOAM

Submitted: 313 days and 12 hours ago.
Category: Chevy
Value: $29
Status: CLOSED
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Expert:  Neal replied 313 days and 12 hours ago.

Hello I'm Neal and I am here to help resolve your issue. If I cannot help I will opt out and refer your question to another expert.

-

The #1 cause is going to be a bad or dirty maf sensor. I would start by cleaning the maf and see if that helps, if it has a lot of miles on it you might want to replace it anyway. If you are running a oiled filter it will often contaminate the maf.

Customer replied 313 days and 12 hours ago.

what is a MAF sensor????

Accepted Answer

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Expert:  Neal replied 313 days and 11 hours ago.

The mass air flow sensor, it is between the air filter and the throttle body in the induction hose.

Expert TypeChevy Mechanic
Category: Chevy
Pos. Feedback: 96.7 %
Accepts: 2274
Answered: 6/15/2012

Experience: Shop Owner and Mechanic on multiple makes.

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Customer replied 277 days and 7 hours ago.

turned out to be a fuel pump

 
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