high idle on a 91 mr2 na

[bobbyb0096]

idleing at 1400 its got new plugs wires cap roder fuel filter cleaned intak any help please sand its got some hasatation at like 2500 to 3500 rpms its a n/a

[MRQtwinturbo]

is the idle staying at 1400rpms or is it bouncing up and down??....when u cleaned the intake..did u change the gaskets too?..

[MitchB]

1. Have you adjusted the idle speed screw? It's located under a rubber cap, if the cap is still there, on the throttle body. (It's a throttle plate bypass adjustment.) This adjustment should be made by first shorting together the E1 and TE1 terminals in the Diagnostic Connector, then setting idle on a warm motor to 800 RPM.

2. If you have messed with the Idle Speed Control (ISC) valve or it's connector, you might have caused a problem there.

3. If you washed out the throttle body with an aerosal cleaner, you could have had the gunk flow down into the ISC and clog up the bearings or washed the lube out of them.

4. The A/C "idle up" VSV connects to the bottom of the throttle body. If you cracked the hose and have an air leak, it will raise the idle.

A warm engine will usually "bounce" the idle speed if it's set a lot higher than 800. The ISC isn't doing it's job correctly, so the ECU starts pulling timing and fuel to get it back down to 800 RPM.

5. Your throttle cable might be set too tight.

[boomie]

i have the same problem... idling at 1400rpm.
but mine doesn't hesitate at all.. engine runs strong.

i'm gonna play around with the idle screw.

[boomie]

its actually 1250 what it idles at...

here is a link of my engine. http://www.s87274938.onlinehome.us/Photo%20Albums/MR2/

Can someone please download the correct photo and use Microsoft Paint and draw an arrow as to where the idle screw is???

Thanks In advance.

[DSR]

its visible in the first pic you have. on the right side of the manifold. it kind of stems up and there is a black cap on top. take it off and there is a screw inside. the tighter the higher the idle i think.

[GT4Addict]

im having the exact same problem

[MitchB]

If you idle used to be 800 or so and now it's 1400, turning the idle screw will NOT simply fix it.

BUT, before you do turn it, short E1 and TE1 in the Diagnostic connector.

[boomie]

short E1 and TE1 in the Diagnostic connector??

hmm.. what the heck does that mean???

[MitchB]

That means you put a jumper wire in there. Jumper wire = paper clip for most people.

[GT4Addict]

See sometimes with mine it will idle high, and also when I press in the clutch the idle with go higher? It also does that when I drive it too