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

car shuts down while driving. Starts again after 3 minutes

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Old 11-11-2011, 04:33 PM
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car shuts down while driving. Starts again after 3 minutes

New ICM,coil,fuel pump,FPR,5 month old Opti.

I have been trying to find out why would my car while driving just bog out and die.. seems like it runs rough then dies.. will crank and start after 3 minutes then do it again.

Any ideas?
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Old 11-12-2011, 04:34 PM
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Re: car shuts down while driving. Starts again after 3 minutes

does it do it when it's warm or cold, or both? any codes?
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Old 11-12-2011, 04:42 PM
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Re: car shuts down while driving. Starts again after 3 minutes

When it won't start, confirm spark and fuel pressure (with a gauge).
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Old 11-12-2011, 06:57 PM
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Re: car shuts down while driving. Starts again after 3 minutes

If your still running stock exhust you may want to check the cat , If its plugged up it could cause a problem .
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Old 11-13-2011, 01:42 AM
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Re: car shuts down while driving. Starts again after 3 minutes

Car aint' gettin no gas.My02.
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Old 11-13-2011, 09:25 PM
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Re: car shuts down while driving. Starts again after 3 minutes

Originally Posted by L.dookie
does it do it when it's warm or cold, or both? any codes?
Seems to do it while warm. No codes. Maybe there was one stored, but I had to replace my battery today.. so no codes are stored now.. but when this happens again, i hope one does get stored, and hopefully not a low res or high res code... sheesh...
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Old 11-13-2011, 09:30 PM
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Re: car shuts down while driving. Starts again after 3 minutes

Originally Posted by shoebox
When it won't start, confirm spark and fuel pressure (with a gauge).
I will carry a timing light and fuel pressure guage with me in the event this does happen.. the thing is.. I can restart after 3 minutes or so...

Can I just drive around for a few days with the gauge on shrader valve and be ok? Also, how would I check for fire? I will be by myself when it shuts down so I would have to put on the inductive lead and press the trigger on the timing light as i crank...

is there some sort of gauge pod I could buy that could monitor ignition on my plugs.. maybe #1.. so I can have all this feedback in the cabin while I am cranking away on the engine on the side of a busy freeway? Houston, Texas
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Old 11-13-2011, 09:32 PM
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Re: car shuts down while driving. Starts again after 3 minutes

Originally Posted by Ocala93TA
If your still running stock exhust you may want to check the cat , If its plugged up it could cause a problem .
New cat was installed 3 days ago... I am also not losing any power... but it does seem like I am missing out..
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Old 11-13-2011, 09:37 PM
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Re: car shuts down while driving. Starts again after 3 minutes

Originally Posted by Fatdog2
Car aint' gettin no gas.My02.
New pump, new FPR and filter...

Even after all of this, i do still experience hard starting... damn it man..... I am so frustrated....

5 month old Opti, and 2 week old ICM and coil...

I do need new wires and plugs.. I am just not looking forward to the job..

I did mist the hell outta the engine bay tonight with the garge lights off trying to look for spark arch.. although I have never been successfull in seeing this phenonamon occur... I am sure i would see some sort of yellow bluish light???

I replaced the battery today also.. as the shop told me it was bad.. but the alternator tested good...

When my cars dies.. I still have electricity to the cabin and light and dash... they do dim though but i suspect it is becasue the alternator is not running pushing the 14 volts..


Even after replacing the entire fuel system minus lines... I still have a hard start condition.. it takes about 7 - 8 seconds to start the engine... I am really thinking it is ignition related..

i did have a problem with the pressure bleeding off when I turn the key to the ON position.. but that was a bad return line in the pump.. replaced that.. now it holds stead after the twist of the key...

Also seems that I am running rough as well... while my engine idles, or when I am at a stop light, i get the occasional bump in the idle.. i can feel it..


Please help me..

Last edited by formula90; 11-13-2011 at 09:44 PM. Reason: more info
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