Engine stall at WSID - any ideas?

[stav]

Hi guys,

I ran the car at WSID tonight and after the burnout of my first run, I clutched in and rolled to the staging lines. The car decided to stall. Then took a couple of attempts and alot of coughing before deciding to start up again. Mechanic at the track advised me to disconnect the battery and then reconnect it to reset the computer (I didn't know the LS1's ran on Microsoft OS's :stick: ).

Would this actually do anything? The idle did seam smoother after doing that but that could have just being my mind playing those funny tricks on me again :confused:

It was a hot afternoon... Any ideas or comments?

-- Stav.

[Kyle]

Did it start up fine and no more problems at all?

Did it seem to start like it was starving for fuel or air?

[stav]

When I tried to start it after the burnout, it almost felt like it was flooded... When it did start, was a little sputtery, then fine.... Not to worry, it is going back to the shop soon and we'll hook up the old diagnosis tools which will hopefully reveal all... I'm more curious about the battery comment by the mechanic... What would that do?

[Sonny@AutoWerks]

Hi guys,

I ran the car at WSID tonight and after the burnout of my first run, I clutched in and rolled to the staging lines. The car decided to stall. Then took a couple of attempts and alot of coughing before deciding to start up again. Mechanic at the track advised me to disconnect the battery and then reconnect it to reset the computer (I didn't know the LS1's ran on Microsoft OS's :stick: ).

Would this actually do anything? The idle did seam smoother after doing that but that could have just being my mind playing those funny tricks on me again :confused:

It was a hot afternoon... Any ideas or comments?

-- Stav.



Stav,

When they stall they are a bit of a bugger to start back up especially cammed or stroked engine ls1's,does this car still have the stock VT pcm calibration ?

regards sonny

[lautray]

Wouldn't worry about it too much. Mine has done that several times. Just fire it up, clear out the cobwebs & away you go :)

[RedVYIISS]

Stav, saw your car out there last night (wasn't sure who it was but saw the TrackChat sticker). Went to say hello to you but you weren't around your car each time I went to it.

[35R]

Stav

did you do anything to the air inlet tract before the run when it stalled?

[DaveHAT]

Hi guys,

I ran the car at WSID tonight and after the burnout of my first run, I clutched in and rolled to the staging lines. The car decided to stall. Then took a couple of attempts and alot of coughing before deciding to start up again. Mechanic at the track advised me to disconnect the battery and then reconnect it to reset the computer (I didn't know the LS1's ran on Microsoft OS's :stick: ).

Would this actually do anything? The idle did seam smoother after doing that but that could have just being my mind playing those funny tricks on me again :confused:

It was a hot afternoon... Any ideas or comments?

-- Stav.

Stav,

Has you car been tuned? Regardless ... By disconnecting the battery you've effectively done a PCM reset which from memory resets the long term idle and fueling trims. Please ... someone with more knowledge correct me here if wrong.

You car will eventually relearn these and performance may change but that would explain the smoother idle etc post battery disconnection. The easier way to do this if you ever need to is:

Make sure you coolant is at or above 80 degrees (ie operating temp)
Turn ignition off.
Go to fuse box under bonnet and remove 10amp fuse designated for PCM. (Fuse puller can be found in fuse panel under the dash)
Turn ignition on and you should hear a beep/chime after approx 10-15 sec. (A small X should appear in the odometre display, this should clear once you restart the car)
Once you hear beep/chime, turn the ignition off and replace PCM fuse under the bonnet.
Once PCM fuse replaced, start the car and let it idle for 5minutes to relearn idle trims etcs.
Done
.

Not really any different to disconnecting battery but no need to worry about radio PIN codes etc, however if your car has been tuned a PCM reset may not make a lot of difference.

Re: stalling, I can only presume that once you've dipped the clutch post burnout the engine has gone from a fairly full noise state, to not needing as much fuel fairly quickly. It's probably just loaded the cylindars up with fuel thus flooding it. Dunno, I aint no mechanic so am guessing. Crank it over until it starts, give it a few revs to clear the throat and continue. If it keeps happening go see someone like Sonny or the Russo boys and get it looked at.

Cheers

[stav]

Stav, saw your car out there last night (wasn't sure who it was but saw the TrackChat sticker). Went to say hello to you but you weren't around your car each time I went to it.

Sorry mate, I had quite a few mates out there yesterday so didn't spend much time with the car.

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Thanks to everyone for the feedback. I'm one of these guys that takes the car to the mechanics, says make it go fast, and then drives it :driving: makes me :yahoo: . Other than that, I am average at best with my knowledge, hence why I love this forum and appreciate your feedback.

As for the details of my car, not too much to say, engine wise, I only have a cold air intake, extractors and exhaust set up and tune. I have changed the diff ratios to 3 9s, updated my front brakes and installed a ceramic clutch. Best run I have done is a 13.6 pass @ 106mph in full street trim.