Topic: jumpy idle at start

[Serenity now!]

I have a 89 22re, so why when I start it the rpms are around 2000? once it warms up it idles around 800. also after I start it half way before it is fully warmed up i hit the brakes and the rpms cut out then go high , repeat.(this is due to the rmps being too high, I think) any suggestions? my 87 22re starts up perfect and idles at 750 all the time, cold, hot doesn't matter.

[79coyotefrg]

it should idle cold around 1200-1400

and idleHOT around 750-850

sounds like your brake booster has a hole in it causing a MAJOR vaccuum leak

[rilla]

Try putting it in 4low when you start it and see if it still does the high low deal. If it doesn't your Idle needs to be adjusted.

[Plowking]

Look for vacuum leaks, get a can of wd 40 and spray around and listen for idle change or get a vacuum gauge and see how the needle sits