What to do if your GM G8 vibrates?
THIS G8 VIBRATED AT LEAST AS BADLY AS MINE! The service manager then promised to call Detroit to find out what else he could do. Two days later the service manager called back. He had talked to “Detroit” The answer was there was nothing else he could do. G8’s JUST VIBRATE! Next I plan to call GM directly… Lets see if this works any better.
What are the symptoms of a bad MAF sensor?
The symptoms of a bad mass air flow sensor include a car that is difficult to start, bad fuel economy, a rough idle, lack of power especially when accelerating and sometimes a fuel smell from the exhaust fumes. A properly functioning MAF sensor is vital for an engine to run efficiently.
What kind of vibration does a G8 have?
It has constatant light to medium vibration most noticible at around 68 mph. Sometimes you can see the the steering wheel buzzing and you can feel the vibration strongly thru the shift nob. I took the car to my dealer at about 1400 miles, they road force balanced the tires and then put 2 new front tires on the car.
Are there any AFM problems with the GM 5.3L V8?
Now, to be fair: Not every GM 5.3L V8 has problems with AFM. Many consumers report a trouble-free ownership experience. Still, AFM problems exist. The AFM excessive oil consumption problem usually crops up on vehicles that go on long highway drives. These kinds of trips don’t put much stress on the engine, so the AFM system deactivates pistons.
Can a non AFM engine make a lifter tick noise?
It DOES NOT apply to Non-AFM Engines. If you are dealing with a Non-AFM engine that is experiencing a similar noise, please refer to Engine Mechanical > Diagnostic Information and Procedures > Symptoms in SI. Some customers may comment on an engine valve lifter tick noise that occurs after the engine has been shut off for at least two hours.
Is the AFM system still causing engine damage?
While this fix has decreased the volume of complaints about the AFM system, many GM vehicle owners are still experiencing excessive oil consumption. In an effort to try and keep the AFM system from causing long-term engine damage, many GM vehicle owners have turned to the after-market for help.
How does Active Fuel Management ( AFM ) affect performance?
It is also known as Displacement on Demand (DoD) or cylinder deactivation. How Does AFM Affect Performance? AFM is good for gas mileage and can be 5-7 percent more fuel-efficient under certain conditions. So Why Turn it Off? There are a few reasons: