Idle bouncing!

[camren123]

so i have been looking around for this answer

so originally when i bought my car it didn't come with a idle control and cold starter so when i would go to start it up it would take a little but idled around 700rpm fine

then after putting in the new idle control and cold starter (fuel injector) my car 1986 325e began to idle at 2000rpm and stick.. but with the new part its ran better then before bur i was not liking that it idle at 2krpm but now my car when starts up goes to 2k-2.3k rpms then it will drop to 600rpms and bounce back and forth from 600rpms- to 1500rpms and my mpg gauge bounces too when i am not driving my car and i am curious if you guys know anything about this but for now i believe it is my throttle control and i am going to get a new one and make sure there are no vacuums leaks and get a new coolant hose and the whole throttle control replaced with the tubes

BUT I NEED HELP

[jlevie]

My first suspicion would be intake leaks. Have a shop run a smoke test and fix the leaks it reveals.

[camren123]

My first suspicion would be intake leaks. Have a shop run a smoke test and fix the leaks it reveals.

well i know i am gonna have to change some of the tubes for sure but that shouldn't be to hard and may fix it but alright ! i will try that

[squidmaster]

have you adjusted the ICV at all? There should be a small flat-head screw that will adjust idle speed on the ICV unit.

[camren123]

have you adjusted the ICV at all? There should be a small flat-head screw that will adjust idle speed on the ICV unit.

yes i have and nothing has changed it between rpms and same with the mpgs kinda like this

http://www.youtube.com/watch?v=RjMo_lVSWYA

http://www.youtube.com/watch?v=iW-GFeoY_Nc&feature=related

[squidmaster]

vacuum leak probably. had the same issues and they're terrible to track down. if you can, try to do a smoke test. but it's likely that's the issue.

[camren123]

vacuum leak probably. had the same issues and they're terrible to track down. if you can, try to do a smoke test. but it's likely that's the issue.

Alright sounds good !

[camren123]

so it ended up getting a new throttle body and tube and that fix it fine perfect idle and runs like a champ

[squidmaster]

tube?