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Fault Code reads Bank 1 & Bank 2 Lean


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Fila
New User

Apr 17, 2018, 3:44 PM

Post #1 of 3 (349 views)
Fault Code reads Bank 1 & Bank 2 Lean Sign In

Hello all, looking for some help here, let me give you some info. Don't remember the fault codes but they indicate the subject. Here is the conditions. When first starting to move or go with the vehicle without much of a wait for warmup the engine is sluggish and can at times cause backfire. Once the engine is warmed up it runs ok except for the following. If you try to go into passing gear such as mash on the gas, there is no increase in power but rather just the sound of something but no speed increase. The service engine soon light is on. If you stop the vehicle for say a drink even a short time the startup again is sluggish. I have had mechanics look at this over and over with no help. Any help would be much appreciated.

Regards,

Grump


Fila
New User

Apr 17, 2018, 3:47 PM

Post #2 of 3 (345 views)
Re: Fault Code reads Bank 1 & Bank 2 Lean Sign In

Failed to give info on vehicle. 1997 Chevy Silverado 5.7 liter engine. Automatic transmission.

Regards,

Grump


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Apr 17, 2018, 4:35 PM

Post #3 of 3 (336 views)
Re: Fault Code reads Bank 1 & Bank 2 Lean Sign In

Test your fuel pressure using an accurate gauge. This engine is very sensitive to pressure and must have over 56PSI



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