Stealth R/t shuts off - 3000GT/Stealth International Message Center

casey2012175 · 11-13-2012, 11:12 AM

A have a twin turbo stealth r/t and when I get on it it runs great, but as soon as I go to slow down, I down shift to second, and its fine and then I push the clutch in and coast to a stop from there, and when i get to a complete stop I notice my car shut off.. it doesn't do it all of the time but sometimes it will come close to stalling, and i will notice the rpm's go down to around 500 and the check engine light will come on, and then it goes back to normal and then the light goes off.. any ideas?

coreyb26 · 11-13-2012, 11:27 AM

The first thing to do is get the code from the CEL. The most common thing that causes these cars to drop the RPMs is the IAC. You can do some simple tests to see if it works at all. When you turn the wheel your RPMs should bump up, also when you turn on the A/C. If it is the IAC, they can be had cheap at Rockauto.com. Many people will suggest cleaning it, I personally dont think its worth it.

casey2012175 · 11-13-2012, 02:26 PM

Well I located the IAC and it appears to be brand spankin new as if the previous owner attempted to fix the issue..

coreyb26 · 11-13-2012, 02:42 PM

Check that code then, that is the best thing you could do. Even though the light goes out the code is still stored.

casey2012175 · 11-13-2012, 03:10 PM

shows no code....
here is a video

IMG 0901 - YouTube

coreyb26 · 11-13-2012, 03:19 PM

lol, I would have believed you without proof.

Has the car always done this as long as you have owned it? I ask because if the prior owner did have an IAC go bad, it very well could have damaged the IAC circuit in the ECU. Not sure if the CEL would come on from that though.

Its also possible that you have a bad connection somewhere, maybe a fuse or something is losing connection intermittently.

Not having a code makes it difficult to diagnose.

casey2012175 · 11-13-2012, 03:24 PM

Just bought the car, wasnt on when i bought it, only noticed it flashing a few times coming home, and now i started it and it wont go off..

casey2012175 · 11-13-2012, 03:39 PM

WOW, I feel like an idiot.. I am so sorry, the light that I perceived as the check engine light, actually is the coolant level light, which I did notice yesterday was leaking coolant.. I was so focused on the light on that side of the cluster that i did not even see the actual "CHECK ENGINE" light.. that still doesn't answer my problem though.. Atleast i dont think that low antifreeze would cause it to stall? it wasn't overheating..

coreyb26 · 11-13-2012, 03:52 PM

lol we all feel like idiots at times. The low coolant "shouldn't" have any effect, but if it was low enough so the the engine coolant temp sensor was not always seeing coolant it could go into cold mode and run pig rich and could possibly cause your problem.
Get some coolant in it and see what happens.

BLACK94TT · 11-13-2012, 09:10 PM

check the dashpot. it's attached to the throttle body on the firewall side with linkage to the TB butterfly valve. It supposed to keep the TB valve from slamming shut when the throttle is released. You should see the dashpot slowly closing the valve for the last few millimeters. If it doesn't adjust the linkage. It's also possible the dashpot is faulty. (but you can easily see if that's the case)

I liked the vid too!