Mitsubishi Repair: car stalling, act flywheel, stock clutch


Question
I have a 98 Eclipse GST manual.  Couple months ago the car stalled on me while I was slowing down and making a left turn.  I just ignore it and didn't think of it much, but now it is stalling on me again and quite often. So I went and test drove it around to get it to stall on me again and it did! So now I know what's happening but now sure where to start. The car stalls when I do a fast acceleration(usually on first and second gear)and shift it back to neutral for a stop sign, a turn, or a stop light. Right after shifting to neutral the rpm would drop to 500 or below, being that it is below 500 most of the time it would stall. I can't really drive on city blocks with a lot of stop signs because of the start and stop where I have to shift it to neutral to slow down and stop. Another issue is that the car tends to jerk and bounce(front only)when I take off on 1st gear.  It seems like I'm not getting enough gas because if i ride the clutch a little it doesn't jerk or bounce but sometimes it causes me to burn rubber. Just to bring it up, I just replace my stock clutch and flywheel to an ACT 2100 6 puck race clutch and ACT flywheel.  But the car did stall before I changed the clutch. I don't think it is the clutch? Thanks

Answer
John,
I don't think your clutch has anything to do with your stalling problem, but the bucking you're experiencing is most likely being caused by your new clutch.  The 6 puck clutches have a much stronger hold than a stock clutch.  Because of this, bucking and jerking is common when trying to drive slowly, like through a parking lot in 1st gear.  6-puck clutches are more commonly used in racing, and not daily drivers.

Your stalling may be caused by your Idle Air Control (IAC) motor.  The IAC is responsible for maintaining a constant idle speed when you let your foot off the accelerator.  If you have a service manual for your car, there are procedures you can use to check it yourself.  The IAC is also sometimes called the Idle Speed Controller (ISC).  But other items to inspect are your EGR valve, Mass Air Sensor, Throttle position sensor (TPS), fuel pump, alternator, throttle body, and all your intake and vacuum hoses.  You have several intake and vacuum hoses since you have the turbo engine, so go slow and be thorough when checking.
Good luck!