LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Stalled out while driving.. 5 times

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Old 09-13-2006, 12:16 PM
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Stalled out while driving.. 5 times

car just hit 142,001 today as I rolled into my neighborhood. While Driving like 50 the car just stalled out couple times...I would put it back into neutral and start it back up and it cranked hard for few seconds felt like it idled rough and popped once,then i put it back in gear and it drove fine..no SES light or anthing the first 4 times..5th time was comming to a stop and the car just stalled again..this time the car took forver to start back up and the SES light went on and the car popped real loud.. i just drove home quickly and right as i came up to my neighborhood the car shut off again, so i didnt try to start it again..I went outside to start it 10 min later and it started fine, idled fine, and no SES light...I didnt try to drive it again, i may go back out and hook my FP guage up and drive it see what happens. I still wanna scan it to see what code was thrown..any ideas?

Fuel pump i believe is factory which makes me think is my problem I kno for a fact the car has over a 1/2 tank of gas, Opti/Coil changed 2)k ago, plugs and wires all have 1,000 miles on them

Thank god i have a racetronix kit in my garage
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Old 09-13-2006, 09:23 PM
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Re: Stalled out while driving.. 5 times

better get that thing fixed for sunday!
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Old 09-15-2006, 03:24 PM
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Re: Stalled out while driving.. 5 times

got the PCM scanned today

DTC 36- High Res Pulse
DTC 16- Low Res Pulse codes

What does that narrow it down to?
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Old 09-16-2006, 05:57 AM
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Re: Stalled out while driving.. 5 times

Distributor, wiring from PCM to distributor or PCM.
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Old 09-16-2006, 11:13 PM
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Re: Stalled out while driving.. 5 times

Ok tonight i had bad problems with the car, ran fine for the first 30min, then all the sudden at idle the tach jumped up and motor just stalled. Car sat for about 20min and started it back up and it was fine..Cruising at 60mph in 5th gear the car just shut off out of nowhere and it wouldnt start again... while on the the side of the road the car would barley stay running and it sounded like the motor was blown like a rod knock or something and the diptick blew out for some reason causeing some oil to burn like crazy on the header. Got the car to a lot and it sat for 40min while i went home to get the stock PCM thinking the one in the car was messed up..Car drove fine for about 10min then all the sudden car died instantly again...let it sit 5 min it started right back up and drove for another 5min where it stalled again..i repeated the process couple times.

Would a bad Knock Sensor cause this?

Or any other ideas...when the car runs it DOES NOT Misfire one bit, it runs great other than stalling out randomly
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Old 09-17-2006, 08:17 AM
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Re: Stalled out while driving.. 5 times

Does it make the knocking sound all the time (like if you rev the engine or while driving under load) or just when stalling?
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Old 09-17-2006, 08:20 AM
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Re: Stalled out while driving.. 5 times

Did you ever look into the problems with the feedback signals from the distributor that you listed before?
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Old 09-17-2006, 10:46 AM
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Re: Stalled out while driving.. 5 times

Originally Posted by Jeff95TA
Does it make the knocking sound all the time (like if you rev the engine or while driving under load) or just when stalling?
When it stalled the one time where i though i blew the motor, The car stall and i went to start it back up and it started knocking so i shut the car off and pulled over with it, and it didnt want to start back up


Speedy- I did not look into them as of yet..prolly gonna do that today
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Old 09-17-2006, 06:25 PM
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Re: Stalled out while driving.. 5 times

hmmmm
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Old 09-17-2006, 06:35 PM
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Re: Stalled out while driving.. 5 times

Try getting another PCM and see if it still does that.
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Old 09-17-2006, 06:44 PM
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Re: Stalled out while driving.. 5 times

Originally Posted by hsyr
Try getting another PCM and see if it still does that.
well i have two PCMs, one for the madz28 tune and the stock tune pcm..i replaced the stock tune PCM last night drove for about 10 mintues and does the same thing
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Old 09-17-2006, 06:56 PM
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Re: Stalled out while driving.. 5 times

Well then check the wiring harness from the PCM to the opti and if thats not it then maybe the opti went south? Take a look under your waterpump, is there coolant leaking out of the weephole? Is the intake leaking oil that somehow got to the opti?
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Old 09-17-2006, 07:09 PM
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Re: Stalled out while driving.. 5 times

no coolant/oil leaking...does anyone re-route the wiring from the PCM to the opti to prvent from burning on LT's?
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Old 09-17-2006, 08:08 PM
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Re: Stalled out while driving.. 5 times

Think it could also be a ICM problem?
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Old 09-20-2006, 05:48 AM
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Re: Stalled out while driving.. 5 times

NO.


Originally Posted by bow94z
got the PCM scanned today

DTC 36- High Res Pulse
DTC 16- Low Res Pulse codes

What does that narrow it down to?
Check the feed back signals as I suggested.
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