I had some repairs done, at a GM dealer, for a coolant leak (outside the
engine) and fuel pressure leak. The Fuel Pressure leak has been around
for awhile, and I decided to get it done while the car was there. Ever since
then it's driving much slower and the RPM gauge doesn't exceed 4000, which is
hard to get it up there. There are no codes (SES not lit). I haven't taken it
back yet but I mentiioned it to them and I didn't like the baffled look on the
mechanics face. I've noticed when I push the pedal that there is a lot more
resistance then before. Whether the car is in limp mode or not, it would be
nice if anyone here has any clue what could be causing this before I take it
From what I read about Limp Mode, I think you're correct. When you mention
throttle body "linkages" what area does this pretain to? I'm just thumbing
through my service manual and I have a few different chapters for the throttle
body. There's the TB air inlet screen, TB Assembly, TB coolant system, TB
Just a couple of updates to see if anyone else thinks this is related to the
throttle linkage. (Scroll down to read my original post) The car has not been
back to the shop yet, so nothing new has been done. Since I've owned it, when
it warms up, I rev it slightly and the engine slows down, thus the RPM gauge
goes a little lower. Lately when I do this the RPM guage will go to around
the 1200 RPM mark stop there (for a few seconds) and then it will go down
below 1000 RPM. I rev it again and the exact same thing. It seems to be
getting stuck there for some reason. After awhile it will stop doing this and
the engine will decelerate properly.
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