It never stops...Story AND ISC Question...Please Read

[kjewer1]

From Dave Mertz of the DSMlink forums, the 1g TPS shouldnt affect the idle speed control system. Dave is one of the two creators of DSMlink, probably the two most knowledgeable poeple on the planet when it comes to DSM ECU operation (excluding the mitsu engineers that created it of course). This makes me wonder why it helped in your case RSLaser. Are you sure you didnt inadvertently change anything else at the same time?


The 2g sensor includes the Throttle Closed switch signal (2g TPS has 4 wires, 1g has 3). If TPS is more than 1 or 2%, it will also make the ECU believe that the throttle closed switch is open, meaning the throttle plate is open, which will tell the ECU to not bother with closed loop control of the idle speed control. On a 1g, there is a seperate switch for this, on the firewall side of the TB right on top. This is another good thing to check on a 1g. Be sure the switch is closing when the throttle plate is closed. It is adjustable, and I believe the factory manual calls for turning the switch body in until the switch closes, then another 15/16th of a turn. Use a multimeter to test the switch. I beleive it simply grounds the single terminal on the top of the switch to the TB, so it is easy to test. If that switch fails or falls out of adjustment, closed loop control of idle will be eratic at best, probably impossible.

[91 Eclipse]

could it be that the timing is off. I heard if the idle is set to low that it surges like that.

[bighauns]

I am somewhat doubtful of the timing, and my idel is set perfect. It was fine and then all of a sudden it wasnt so I know my idel is okay.

I found that with the ISCM I put in, the revving would not stop it would continue on. With the one I had in before it would rev up and then just stop after about 5 mins and would only do it if the car had sat for a while.

With the other one, it would constantly do the revving thing which leads me to believe that that ISCM is worse than the other one. Would this also mean that it is clear the the ISCM is the problem? Or could it be something else?

thanks!

[91 Eclipse]

I talked to a mechanic and hes going to hook a computer up to my car on monday or tuesday and ill poast the results then.