1997 Buick Lesabre Repair Question
Mileage: 127,000 miles.
High idle when i take it out of park.
Asked by pcdj64Answer
wow, lots of new stuff.
it sounds like you have a vacuum leak. you need the intake system smoke tested to verify.
stop throwing parts at it and get it correctly diaged.
Roy
i am replacing original parts with new parts a little at a time.
some was bad like the upper intake and a few of the sensors. the O2 sensors i did with the exhaust. i will look for a vacuum leak, thank you for the help.
let us know how you make out.
Roy
no vacuum leaks, all lines connected, no dry rotted rubber.
today it did not go to high idle when i put it in gear but it did stall the first time i tried to start it. it has lot of power, idles smooth at around 800rpm. if it was vacuum i doubt it would idle smooth or run very good.
Is the check engine light coming on at all?
You will need a good scan tool to look at all the sensor data to see if everything is where it should be. Look closely at both the CTS and IAT.
here is where i sound like an idiot lol, what is CTS and IAT?
there was a check engine light a while ago that has been resolved with new sensors. no light now at all. so far today it has not idled higher when i put in gear but it did take a few tries to start it, it starts and sometimes immediately stops or slows fast and stops, when it finally stays it sounds like it wants to stall but catches itself, runs perfect after that. well as perfect as a 3800 series 2 can run.
Coolant Temp sensor
Intake Air temp sensor
both sensors are 15 years old with 137K miles, i was told to check the crank and cam position sensors but they are not turning on the light.
i did notice the car only acts up after it is warm, first start in the morning it is fine.
never since i have had the car has the temp gone over 1/4 of the way, even on a very hot day in traffic it is 1/4 and takes a while to reach even that. i changed the CTS and now it goes to half or a little above half. i also changed the IAT, it didn't look too healthy.
so far it has started and stayed running a few times without stalling or running at high idle, will keep you posted. thank you much for the help.
The intention was to test and not just throw parts at it but if it worked, great.