bad mass air ?
when driving the car at hwy speeds light throttle usually a few minutes into the initial drive the car starts bucking HARD like its dropping cylinders or like the brakes are being applied hard the car stumbles and bucks then it seems to go away. Now when its doing this the temp Gage goes dead and flutters back and forth while the car is doing this...
There is NO SES light when this is happening...the car had 115k on it...
car only seems to do this on the hwy
any suggestions
Bad coolant sensor. When pegging, it will cut fuel. Before blaming the sensor, maybe as a disaster check verify you're not exceedingly low on coolant.
Second, it could indicate a loss of 12v, bad ground, or short in the column itself, so the car literally cuts off and on. If only the temp gauge is affected, it's probably not this, but if you notice the volt meter fluttering too and the oil pressure gauge, that to me would indicate loose connections or badly eroded wire insulation.
With that bucking, I'd expect some codes to be thrown with freeze frame data captured. (Even if the problem isn't enough to trigger an SES light.). Have you scanned for codes, yet?







