Northstar Engines and System Technical Discussion Discussion, A glitch or my imagination? in Cadillac Engine Technical Discussion; For the last couple of weeks, I *think* my STS has been having very short glitches while driving at a ...
For the last couple of weeks, I *think* my STS has been having very short glitches while driving at a steady speed with the cruise control on. It's not a miss, and it's very short - half a second maybe, a "fluctuation in the force". I could be imagining it. It seems to happen every few minutes, especially if I start up or down an incline. There's no Check Engine light, and it seems to run fine most of the time. The only other thing I've noticed is less mileage - 22-23 mpg at cruise compared to like 28-30 in the 2 loaner DeVilles I've had recently, at similar speeds.
Can anyone think of an explanation? Am I just crazy? I know the dealer would just say "could not duplicate customer's concern".
Your dealer should be able to hook up a diagnostic computer and watch for misfires. It should be no problem to detect a miss, provided they actually take the time to do it. You might also be able to get them to tell you what those codes mean if you stop in, or call up on the phone and ask real nicely