Idle problems

My sister bought a 94 Talon turbo, fwd. It's in mint condition, other than a small problem with the idle. It seems to sort of bounce, and it even stalls sometimes. I'm just thinking that the idle screw needs to be adjusted. Can someone tell me where it's located (with pics if possible), and whatever else it could be if that's not it. The 1000 FAQ site is down at the moment. Also, can I find the repair manual for it online somewhere?

Well if you want to buy a repair manual then go to this site and choose which ever one you prefer

http://www.car-stuff.com/performance/brand.php?make=mi&year=1994&model=eclipse&category=books_-and-_manuals&part_name=repair_manua

I don't think that the idle surge problem that you have will be fixed by only that screw. I have an idle surge as well but I get rid of it by unplugging that green wire with the connector that sits on top of the throttle body next to where the intake pipe goes in. When I unplug that my idle surge goes away and there is no after effect but that doesn't fix it but... Good luck.

By repair manual I meant a scanned version available for download. I myself own both a Honda and a Toyota, and someone actually went through the trouble of scanning in the reapair manual for them. Like here's the link to the manual for my MR2: http://www.mr2-tech.com/bgb/mechanical/index_mechanical.htm
I was wondering if there is something like that for the Eagle Talon/Mitsubishi Eclipse.

As for the idle surge, what other things can I try?

Clawhammer,
I had that same problem last year that my idle would bounce and sometimes stall at a light if I didnt rev the engine alot higher then usual. For me the fix was to replace the Manifold differential pressure sensor, which is right on top of the intake manifold. But my car was throwing a check engine light with it, not sure if this might be your problem but just sounded exactly like my problem.

ogami I have the same problem where did you find that part or should I just go to a junk yard. sorry for thread stealing my bad.

http://www.we-todd-did-racing.com/wetoddimage.wtdr/wOTAzMzg1NnM0MTNkZmQzMXk1NDE%3D.jpg

Is that circled in red the ISC? Is that phillips screw the only thing that attaches it to the throttle body?
How do I disconnect the idle switch? Is that the red plug that's in the picture?

http://www.we-todd-did-racing.com/wetoddimage.wtdr/wOTAzMzg1NnM0MTNkZmQzMXk1NDE%3D.jpg

Is that circled in red the ISC? Is that phillips screw the only thing that attaches it to the throttle body?
How do I disconnect the idle switch? Is that the red plug that's in the picture?

Isn't that the TPS? Thats what I thought it was.

Manifold differential pressure sensor

Where do I find this part on the engine, picture would be nice. Also does the 1st gen have this same part.

I have an idle surge as well but I get rid of it by unplugging that green wire with the connector that sits on top of the throttle body next to where the intake pipe goes in. When I unplug that my idle surge goes away and there is no after effect but that doesn't fix it but... Good luck.

http://www.we-todd-did-racing.com/wetoddimage.wtdr/wOTAzNDkzNnM0MTNkZmQzMXk1NDE%3D.jpg

You mean unplug the green wire that the arrow is pointing to in the picture?

You mean unplug the green wire that the arrow is pointing to in the picture?

No, there is a green wire on the 1st gen, I don't know about the rest of the DSMs, but there is a plug like thingy on top of where the throttle cable connects to the throttle body. I would show a picture but I can't get it to work.

Let me run out to the garage and take another picture. It's a 1g

http://www.we-todd-did-racing.com/wetoddimage.wtdr/wOTAzNjUxNnM0MTNkZmQzMXk1NDE%3D.jpg

That one?

Mine was right on top of manifold can't miss it, on the 1st gen's not sure where it is. I actually got the part from a chrysler dealer, I have a picture on my home machine, I visiting my parents right so I'll post a pic as soon as I get home, so it will give you guys a hand in finding the part. I'll post the pics by tomorrow night for you guys.

Yes try that wire that is the one that I unplug and the idle surge goes away. I don't know what it goes to I never traced the wire so... good luck.

yeah I have the same problem that when I take that off the surge goes away but idles high at like 2500 RPMS. the ISC is below the Black sensor or the TPS sensor to the left of the intake manifold or passenger side it has a plug on it, you can test this there is many threads about this.

Update

When the green wire is unplugged, the problem is still there.
When the ISC itself is unplugged the problem is still there.

What next?

well it sounds like you might have a bigger problem then most I dont know what to tell you I have had the problem for about 2 months before I figured out wht the problem was. Just keep trying things or take it in and have them fix it

What about the Fast Idle Air valve? Could that be it? It only happens when the car is cold. Does anybody have a diagram of the throttle body area, say the page from the manual or something?

the throttle body is behind the inlet to the intake manifold. it dosent have to be a green wire either mine is wrapped up.

Could be that the ECU isnt bothering to do closed loop idle control. Verify that there is ground at that closed throttle switch (the single wire, or green wire as mentioned in this thread). If the ECU doesnt see ground on that pin, it wont know that its supposed to be conroling idle speed. If thats the case, it would explain why unplugging the ISC doesnt change anything, sicne the ECU isnt making use of the ISC. I would start with that closed throttle switch.

i thought the sensor was called the manifold differental pressure sensor, thats what i got off of another thread of this type.

Holy shit, now your moving on to emissions equipment. :D The MDP sensor is simply there to verify that the EGR valve is functional, and has nothing to do with idle or the engines operation at all.

oh the never mind about that name that aint right lol. i knows its on the throttle body though