It's probably in the tune since he warned you that it needed one. Maybe it doesn't have enough fuel at a certain rpm and negative vacuum. You can probably data log it while driving and see where it cuts off and check the tune to see if everything looks o.k.

 

It can also be a bad o2, I had a similar issue way back then when a bad o2 was missing up my afr's which caused my car to shut off at certain Rpms. But like said above, get a new tune. Good luck.

 

Im thinking bad 02. since your running aem your not using maf are you?

 

Sometimes a short in the harness will shut the car off at random. Hitting a bump or turning and making a wire ground out would kill the engine at different rpms and speed such as your are experiencing.

 

I agree, had the same problem on my SC300, car would just shut off and I would have zero "electricity". I replaced the ground wire running from the battery to the block, never happened again.

 

I'll check on the o2 sensor.. no maf but i did notice the "sensor turbo pressure" had nothing plugged in..

what's the fix for a short in the harness?

 

got a new tune. the car shut off on me 4 times last night.. anyone think it could be the dashpot? I've read a new stories of a bad dashpot shutting cars down..

 

When mine went out on me, the car would not start. Fortunately, it shut down in my driveway while motor was timing down. The car would not re-start until it was replaced. This was my one and only experience with this issue so I am not clear on whether symptoms can occur as you described above. Good luck.

Ken.

 

I know this will sound ridiculous... But I had the same problem. It must have stalled 100 times randomly (6spd) whether driving, decelerating etc. Just by luck, Redline shock proof heavy LSD oil was on sale, bought it, changed it and during the change I noticed that the diff oil was in really bad shape (94 TT). Anyways after the shock proof heavy went in for whatever reason, the car never stalled again! Not even once..

Really strange yes, but I swear by Redline's shock proof heavy gear oil for this reason and because it works well too!
Just thought I'd share my common symptom, hope it helps.. Good luck!

 

You buy that one in killeen with the gold front bumper?

 

nope, came from Cali

 

Is it doing any other weird random things?

So it only shuts off when u throw it out of gear? Can u keep it alive if u give it gas?

I'm guessing u would have a wideband by the other mods listed, how r ur afr, stable? Erratic?

 

it's not doing any other weird things. it seems like it shuts off when i get out of gear, let off the throttle, and clutch in. it comes back to life if i pop it back into gear and pop the clutch.. AFRs are stable.

 

Well I had a similar stalling problem, I had a ruff idle, and it turned out to b A bad Tps. Did ur tuner experience the stalling problem; if not trying hooking aem to computer and simulating the stall: bring ur rpms up and just let off the gas So it dies and see if anything does seem right, bring it up to ur tuner or sf

 

it idles ok actually after he tuned it.. but i'll take a look at the tps this wknd before i bring it back to him. thanks!

 

Same here with the electronics staying on, could clutch start it, turn the key and start back no problem. Mine would also stall when clutching in or taking out of gear, or letting off the throttle. Have you changed/checked the diff oil since you acquired the car? I remember feeling a slight vibration sometimes in the gas pedal while negotiating certain turns. I don't know yet the cause why bad diff oil would cause the engine to shut off randomly, but I do know your symptoms happened to me also and was solved when I changed my diff oil that just happened to be really bad.

I wonder if anyone else had the same experience? We'll see..

 

Thanks DJ LEXTOY, I'll give it a shot.. can't hurt.. lol