running to lean

**Hot head** · 05-06-2011, 01:42 PM

My car is running to lean I keep getting p0171 and p0174 I cleaned the Maf...it also stumbles sometimes. One o2 sensor has Ben changed all the others are original...passenger side catalyst has been replaced

Suggestions please....

**sunsetorangess** · 05-09-2011, 04:30 PM

Is it the stock MAF?
J

**Hot head** · 05-09-2011, 04:31 PM

Originally Posted by sunsetorangess

Is it the stock MAF?
J

No slP.... the stumbling is way to much to just be a bad maf though...
once I cleaned it the cel light is on full-time

**sunsetorangess** · 05-09-2011, 04:39 PM

Try swapping it out with a stock unit, Either your old one or if you have a buddy with a stocker and see what happens... You may be amazed.
J

**Hot head** · 05-09-2011, 04:43 PM

Originally Posted by sunsetorangess

Try swapping it out with a stock unit, Either your old one or if you have a buddy with a stocker and see what happens... You may be amazed.
J

Not an option others have Shelby cobras or vipers or Corvette zo6.

My car came with it...no stocker

**pajeff02** · 05-09-2011, 04:54 PM

Agree. Throw the SLP MAF away and get a stock or stock replacement MAF back on the car. Our car came with a modded MAF and a stumble that drove me nuts until I did the research. Other possibilities could be defective O2 sender(s), a post MAF air leak that is drawing unmetered air into the engine, or a vacuum leak that would have the same effect.

Do you have access to a scanner to see the live sensor data?

**Hot head** · 05-09-2011, 04:56 PM

Originally Posted by pajeff02

Agree. Throw the SLP MAF away and get a stock or stock replacement MAF back on the car. Our car came with a modded MAF and a stumble that drove me nuts until I did the research. Other possibilities could be defective O2 sender(s), a post MAF air leak that is drawing unmetered air into the engine, or a vacuum leak that would have the same effect.

Do you have access to a scanner to see the live sensor data?

Diagnostic on sat keep u posted