New throttle body

thechef · #1 (**permalink**) 06-04-08, 02:50 PM

My '06 V8 STS4 has had a couple issues with the engine light coming on. the first was a seal that needed replaced on the MAF. Engine light was still coming on. The dealer now replaced the Throttle body. Good, no more engine light. Well, ever since the change, I have gotten 4 to 5 MPG less. Any ideas of what could have happend?? I'm ready to ask them to put the old one back on. HAha

shudog · #2 (**permalink**) 06-05-08, 10:55 AM

Does it run any differently? With the combination of "check engine" light and bad mileage, my first guess would be a bad intake or exhaust sensor.

thechef · #3 (**permalink**) 06-05-08, 03:41 PM

The car runs and feels the same. The thing is, I was getting better gas mileage with the engine light on and the old throttle body. could the new trottle body make this happen? Wouldn't a sensor throw the Engine light back on? thanks for your input.

justgreat · #4 (**permalink**) 06-07-08, 07:29 AM

it's possible that the engine managment electronic control unit will need to learn the new parameters of the throttle body...i would think that the sensors going into the t/b are integral to the transmission and the drive by wire circuits. if it persists, i would contact the service manager and have the car checked for codes.

there does seem to be a history of problems with the throttle body...

jackg
06 sts6