993 stalling

[50-45]

have a'95 993 w/a lightweight flywheel. sometimes stalls upon deceleration, downshifting. any ideas as to what problem is?

[RSTarga]

The lightweight flywheel.

[TMc993]

It may be a software problem or an ISV problem...Take a look at this.... Fixed My LWF Stalling Problem - New ISV - Rennlist Discussion Forums

[wildcat077]

I recently installed a 95 3.6 in my 89 and i have a Patrick lightweight flywheel along with a KEP lightweight pressure plate and i believe the Steve Wong chip that i also swapped in my DME addresses the stalling issue.

I've never had the car stall on me !

Cheers
phil

[earossi]

If you review past posts, you will note that it has been a unique issue that the 95 is the only model year 993 that appears to be sensitive to stalling when the LWF is installed.

You may have to replace the LWF with one of Steve Weiner's Mid Weight Flywheels that he is now producing particularly for the 95. The disc weighs a few more pounds then the LWF which provides just enough momentum to prevent the stalling on decel issue you are experiencing.

I would also either clean or replace the ISV since they have been known to hang up and cause or exacerbate stumbling or stalling on decal. There is a DIY on cleaning the ISV on this site. Just remove it and flush the ISV with carb cleaner until the valve can be rattled. Cleaning the ISV or, in worse cases, replacing it may minimize your issue; but, since there has been so much written about stalling issues in 95's with the LWF, I think that ultimately, you will need to upsize your flywheel to solve the issue.