After coming back from skiing, the engine started idling really high (2000rpm) at a stop light. I figured it was cause of the long drive so i brought it home and shut it off. When i shut it off, it sputtered and chugged after the key was out and then finally died.
I let is sit overnight and then when i started it this AM, same thing. I cant get it to idle under 1900rpm. It was idling at approx 950rpm before this weekend. It hesitates at take off and still continues running after i shut it off for about 2 secs then shakes and dies.
The oil pressure is about 50-70 on the highway and about 40 at idle.
The engine is an 89 2.5L with the TBI (not mpi)
I have checked all fluids and the obvious stuff.
Anyone have any ideas? This is now my daily driver so any help is appreciated.
I had the same problem with my swapped in 90 2.5 about 4 months ago. I sprayed the throttle body, thourougly with a good carb cleaner(I use Valvoline Carb Cleaner), then cleaned the K&N and it went away.
There is no "TRY", Just "DO" or "DONT DO"
I don't know too much about TBI but my daughters cavalier had a simular problem took a long time to return to Idle.It was the Idle air controll valve(motor).
I took it apart and cleaned it even though the manual warns against it.It was pretty dirty on the inside,I used brake parts cleaner to clean it.,It did not work at first.I had bought a new one and read the installation instructions and they said it must be run over 45 mph to reset the computer <<<<<actually driven....,so I did that and it worked so I returned the new one .It still runs kinda crappy so I may need a new one sometime or another,but I put it off for a while.
If it is running rich from the previous problem carbon deposits may be causing it to deisel(preignite )after turning off the key.
Learn to let go of what does not serve you ,but forces you to serve it
why does everyone ask if I am gonna paint it ?