My 99 dodge intrepid rpm idle is too high when in park its around 2000rpm but goes back to normal when placed in gear. Sometimes it will idle at 1000 RPM or slightly above it. If I apply alittle gas and bring in to 2000RPM it will stick there. If I throw it into gear and back into park it will go to 1000 RPM or between 1000 and 2000 RPM. I dont know, it dances around. We've looked for any vacuum leaks using break cleaner and so far we havent found any leaks. It cant be a vacuum leak cause the high RPM would be consistent and not dance around. Anyone know what else I could check?

Look at the automatic idle module and its associated wiring.

All the above is normal , except 2000rpm is a little high at idle . can be adjusted down to 1500rpm. the computer adjusts the engine speed . in drive the transmission loads up the engine idle drops to 1000rpm . in park engine unloaded rpm increase all normal.

Check with your local Toyota dealer, this model may have had a recall notice out for this problem, if so they should fix it for free.

Chech idle adjustment screw, and spark plug gap.

Hi there,

If you're willing, we can try checking your computer for trouble codes - this will help identify any electrical issues.

Note: there's a 50/50 chance this procedure will work (as this does work on the 1997 model):

- With gear in Neutral, start engine and rev the car to 2,500 rpm, then 'gradually' reduce revs down to idle speed.
- with park brake secure, slowly cycle the gear lever through each position (down to 1st, then back up, ending in Park)
- turn Airconditioning ON, then OFF - turn engine OFF - Within 5 seconds, perform the following Ignition Key sequence (without starting): ON, OFF, ON, OFF, ON (if done correctly, your ODOMETER should display a series of 4-digit codes). Please reply back once you have your codes..... Cheers,

Take it to an auto parts chain store where they will run a diagnostic scan for free and tell you what sensors may be causing this. It sounds like a throttle position sensor or possibly and idle air control valve. It could also be caused by a vacuum leak causing the computer to over compensate with more fuel causing the high idle.

get computer codes but sounds like low fuel pressure (fuel pump)

There no adjustment for idle, control by computer, TPS reading should be .50 volt's, you could have a vacum leak, check vacum line and check for vacum leak at base of intake manifold.

Go to a car place to fix it

its your idle control valve