Idels high shifts hard and that is like every other time started put in new ecm and still have the issue
Your describing a vacume leak or a mis adjusted throttle body. Does it ever idel down? What engine is in it Desiel? If it's gas the AIS motor might be sticking or is bad. Does it run and is the check engine light on? are all the fluilds correct level? coolant level low can make the coolant senser lie about the temperture of the motor to the ecm and it'll command a high idel. Once the idel motor goes as high as it can it might be shicking and you can remove it and wash it off with carb spray and while it's out with the wire connected turn the key on and off with it in your hand and spray it with cleaner till it moves smoothly. With it retracted install it and try again, any vacume leak will make it idel fast. The trans mission will shift hard if the vacume line to it is off and it's on the back of the intake manifold and it goes to a modulater on the side of the trans. it can be off there too.
Dec 19, 2010 |
1995 Chevrolet Suburban