Cak119 Posted August 20, 2016 Report Share Posted August 20, 2016 I have a 98 deville with 197k miles on her. For starters the plugs and wires have been changed, new fuel filter, changed iac valve and throttle positing sensor. Usually it takes 2 to 3 turns of the key to start her. Once started she is usually idling at 1000 rpm or higher. If I drive off like that she just keeps increasing in speed. So if she is that high I shut her off and turn back on. Usually idle is at 2000rpm so I shUT down again and turn back on, usually 3rd try or longer she is finally idling around 600 to 675 rpm. When driving she is usually good but every so often all of a sudden rpms increase and she starts gain speed without giving gas. Sometimes hitting the pedal a few times will work and she will go back to where she should be other times I have to pull over shut her down and restart until the rpms are correct. Since the iac valve and the position sensor have been replaced, what could be causing all these issues? Thanks! Chris Quote Link to comment Share on other sites More sharing options...
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.