For about a month now my car has been stalling when I drop into neutral after the car is warmed up. It happen about 75% of the time the other 25% it bounces below 500rpms and settle down after a few second to a smooth 750rmp. The car runs great with the exception of falling flat on 1st gear acceleration from time to time, not boost related, when I go from normal to WOT. That only happens in 1st though. Normal city gas mileage is around 8-10mpg under 4000K between shifts. The car hard warms up before I get to work.

PFC,4x850's,intake,down pipe, hi-flow cat, cat back, FMIC

Fresh rebuild
no smoke, unless WOT (running pretty rich)
occasional ow rpm mild backfiring out exhaust

My tuner been through it a couple of time with no improvement. I'm still waiting on a dyno tune, but not real confident that's going to correct the problem.

Any ideas

 

There's a clutch switch that may need to be replaced. I think what happens is that when the clutch pedal is depressed, the switch switches and tells the computer to up the revs a little. If the switch is bad then this adjustment won't happen and the engine might stall. It's a $20 part, 5 mins to change. Do a search on "clutch switch" for more info.

 

That must be what is happening to my car. I thought my clutch wasn't fully disengaging...I love this forum! Thanks for the info.

 

Ok where is this switch. I just had my tranny redone for the 5th gear sync and had a new clutch put in. Since I picked up the car I have this issue car dies when I depress clutch but idles fine and runs fine otherwise. Guy who did the tranny looked at me sideways when I metioned this. Also after this work was done my oil pressure guage is bouncing all over he most likely got his dirty hands all over the connection to the sending unit when disconnecting.

Thanks Pics would be a plus.

 

The clutch safety switch is under the dash and is not related to a tranny r&r. it's really simple to find. Ge underneath the dash on your back and look at the clutch lever. Towards the top you'll see a little contact switch that is connected when the clutch is up. When you press the clutch down the contact switch will be open. I'm sure you could do a simple self check with a multimeter set to the continuity setting.

 

Thx

I had no issues at all. Just had the clutch and flywheel changed and now I have the car falling on its face when I clutch down from first to second. Could be from testing that it just went bad, but all was good before this was done. Thx for the info.

 

(assuming you have a commander) In the PFC under rev/idle settings what are the 6 settings set too?

 

Check the dashpot and its adjustment, it's on the TB. Its purpose is to prevent stalling on decel.