2007 Chevrolet Tahoe Repair Question
Topics covered: Engine, Axle, Check engine light.
Mileage: 97,997 miles.
Mileage: 97,997 miles.
Asked on August 19, 2011
2007 Chevrolet Tahoe Z71, miss firing
Hello, I purchased a used 2007 Tahoe Z71 and it's been miss firing (missing) 2 wks after my purchase. The check engine came on so I had it serviced: new axles, fuel system cleaning and another week later they had to replace the fuel pump. The techs say my spark plugs are good, but after all this my tahoe still misses while stopped. It does have 97k miles, use to be a fleet. Any idea? Thank you in advance.
Asked by maeday77Answer
Replied on August 19, 2011
What are the exact code numbers being set when the check engine light comes on?
Replied on August 19, 2011
P0171 and P0172. Prior to replacing the fuel tank it was putting out 48PSI. That has been corrected, but it's still missing. There is no chk engine light on currently.
Replied on August 19, 2011
I think you meant PO171 and PO174.
What is the fuel pressure now?
Replied on August 20, 2011
You should be getting some misfire codes if it's still missing.
Replied on August 20, 2011
That's what's baffling, it is not giving us any other codes. Well thanks for trying.