idle problems,from flywheel???

[91-gsx]

well i had my act2600 clutch and act flywheel installed not to long ago, about 1,300 miles on it. it works great grabs really well and holds nicely. but when you push the clutch down while in gear and driving, the flywheel drops the rpms really fast, but that is not my problem. the problem is that the rpms drop so fast that the car dies at times. now i do not know if this is just due to the flywheel because i have high idle problems at times, and really low idle at other times. if i do not run the car really rich at idle, when i push the clutch in it just dies, because the rpms drop too fast. but if i am parked and just tuning the idle, i can take out about another 15% fuel, but when i drive it and the rpms drop, it does not try to stay alive like when it is running really rich. so i leave it rich so that it does not die while I'm in traffic or coming to a stop quickly. anybody experience any of these problems please inform me, maybe it is my idle control valve, but it looked ok when we took it out once, then again it could look ok but be bad.
any help is appreciated,
thanks

 

[95GSXBLUR]

Fly wheels are inertia devices.. they're really to help keep the engine running when you do push in the clutch and come to a stop.. exactly how you just said. I have the same problem too because i run the Fidanza 8lb flywheel.

what i do to remedy the problem is raise the idle to about 1000 or 1100. I do this via DSMLINK. And i also changed my driving style, i don't coast with the clutch in, and when coming to a stop i down shift and let the RPMs pretty much come back down to idle and then push in the clutch... about 2000RPMs or so, that slows it down enough it doesn't die.. granted I'm a 2G but the principle should be the same.

 

[snox135]

I have the Fidanza flywheel also. Mine will stall once in awhile if I throw the clutch in but it rarely ever does it (maybe 2-3 times a year on a daily driver). If yours is doing it quite often you have have another problem. The ACT flywheel is heavier than the Fidanza so it should do it as often. But the difference may be in the control loop programing between the 1g and 2g.

 

[98GSX-WI]

I'll be darned. I've been having the same problem and have an 11 lbs. lightened flywheel. I never thought that it could be the flywheel.

If I accelerate really fast in first gear and then put the clutch in an coast is when I have the most trouble...or if I'm going above 30mph and put the clutch in to coast.

I've checked the ISC motor, adjusted biss screw, put on a new TB...and still have the problem. I've adjusted my driving to downshift too and don't put the clutch in to coast when rpms are higher...

If this is the problem, I guess I am relieved then...

 

[92awddsm]

well i had my act2600 clutch and act flywheel installed not to long ago, about 1,300 miles on it. it works great grabs really well and holds nicely. but when you push the clutch down while in gear and driving, the flywheel drops the rpms really fast, but that is not my problem. the problem is that the rpms drop so fast that the car dies at times. now i do not know if this is just due to the flywheel because i have high idle problems at times, and really low idle at other times. if i do not run the car really rich at idle, when i push the clutch in it just dies, because the rpms drop too fast. but if i am parked and just tuning the idle, i can take out about another 15% fuel, but when i drive it and the rpms drop, it does not try to stay alive like when it is running really rich. so i leave it rich so that it does not die while I'm in traffic or coming to a stop quickly. anybody experience any of these problems please inform me, maybe it is my idle control valve, but it looked ok when we took it out once, then again it could look ok but be bad.
any help is appreciated,
thanks

Check the closed throttle switch located on the throttle body. It is the single wire switch that makes contact with the throttle linkage when at idle. Make sure the wire is hooked up and also make sure there is continuity between the terminal and ground when the throttle is closed. If there is no continuity, check the throttle cable to make sure it is allowing the throttle to close completely. If the cable isnt the problem, try adjusting the switch so it makes full contact with the linkage when the throttle is closed.

Another possibility could be that the ground strap is missing that goes from the top of the tb to the top right tb bolt. Without this ground, you could be chasing idle problems forever. If you need some more info, just pm me.

 

[oldman]

Sounds like a problem with the ISC, which is responsible for keeping proper idle when ever the system is in accessory load like stepping on the clutch pedal. Check the ISC first, if it checks out, I suggest going through all the basics.

1. Leak test.

2. Compression test.

3. Check valve timing.

4. Check ignition base timing.

5. Check IPS and TPS settings.

6. What is your vacuum reading at idle?

 

[bullettdsm]

I suggest going through all the basics.

1. Leak test.

2. Compression test.

3. Check valve timing.

4. Check ignition base timing.

5. Check IPS and TPS settings.

6. What is your vacuum reading at idle?

I had a 9lb? in my 1g. I had initial problems until the computer "learned" the flywheel. While my idle ended up a little low (easily fixed with the biss), it no longer stalled out. It took a few miles (maybe a couple hundred? Did not check).
MB