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06 lucerne 3,8 #4470446
07/25/17 08:21 PM
07/25/17 08:21 PM
Joined: Mar 2009
Posts: 453
northeast
lucerne06 Offline OP
lucerne06  Offline OP
Joined: Mar 2009
Posts: 453
northeast
got a p300 code misfire on multiple clynders, car was running rough wanting to stall....replaced all three coil packs and a new ignition module....started car and it was still running rough and sluggish waited a few minutes then took it for a drive, starting running better, then nice and smooth.. But one weird thing happened after about a three miles drive, stopped at a light and when I went to go, it just stalled right out...had to pull over it just died...put it in park and it started right back up and I drove it home , idled it for another 10 min, drove another mile and it seemed fine...what does anyone think why it just died like that. ??

Last edited by lucerne06; 07/25/17 08:22 PM.
Re: 06 lucerne 3,8 [Re: lucerne06] #4470505
07/25/17 09:58 PM
07/25/17 09:58 PM
Joined: Aug 2010
Posts: 12,906
Northern Kentucky
901Memphis Offline
901Memphis  Offline
Joined: Aug 2010
Posts: 12,906
Northern Kentucky
Sounds like you forgot to clear the codes before you installed the new parts?


2012 Chevy Cruze LT 1.4T - 50k
2002 Buick Century 130k - Built 4T65e(Maxlife) - Edge 0w40 + Fram XG3980
Re: 06 lucerne 3,8 [Re: lucerne06] #4470513
07/25/17 10:05 PM
07/25/17 10:05 PM
Joined: Mar 2009
Posts: 453
northeast
lucerne06 Offline OP
lucerne06  Offline OP
Joined: Mar 2009
Posts: 453
northeast
i actually installed the parts, then before starting cleared the codes, then started it...after it just stopped, no other codes presented..

Re: 06 lucerne 3,8 [Re: lucerne06] #4470527
07/25/17 10:37 PM
07/25/17 10:37 PM
Joined: Dec 2012
Posts: 635
Washington for now
WhyMe Offline
WhyMe  Offline
Joined: Dec 2012
Posts: 635
Washington for now

Re: 06 lucerne 3,8 [Re: lucerne06] #4470559
07/26/17 12:39 AM
07/26/17 12:39 AM
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Merkava_4 Offline
Merkava_4  Offline
Joined: Jan 2007
Posts: 17,501
Clovis, CA
There's shraeder valve right on the fuel rail for hooking up your fuel pressure gauge; see what your fuel pressure is; should be from 40 to 60 psi. If your fuel pressure is good and your spark is good, turn your attention to the crank sensor.

Re: 06 lucerne 3,8 [Re: lucerne06] #4470584
07/26/17 03:37 AM
07/26/17 03:37 AM
Joined: Jan 2011
Posts: 2,830
N.Ohio
Lubener Offline
Lubener  Offline
Joined: Jan 2011
Posts: 2,830
N.Ohio
Originally Posted By: lucerne06
got a p300 code misfire on multiple clynders, car was running rough wanting to stall....replaced all three coil packs and a new ignition module....started car and it was still running rough and sluggish waited a few minutes then took it for a drive, starting running better, then nice and smooth.. But one weird thing happened after about a three miles drive, stopped at a light and when I went to go, it just stalled right out...had to pull over it just died...put it in park and it started right back up and I drove it home , idled it for another 10 min, drove another mile and it seemed fine...what does anyone think why it just died like that. ??


Probably because you didn't fix the problem.Happens frequently when one guesses at a problem instead of diagnosing it.

Last edited by Lubener; 07/26/17 03:38 AM.

The "thinking" man's friend.
Re: 06 lucerne 3,8 [Re: lucerne06] #4470791
07/26/17 09:14 AM
07/26/17 09:14 AM
Joined: Feb 2013
Posts: 3,117
Virginia
bigt61 Offline
bigt61  Offline
Joined: Feb 2013
Posts: 3,117
Virginia
Could be a fuel pump on it's way out. Do as Merkava suggested above. Don't let it run low on fuel as that will kill a weak pump. Don't fill it up either as it's a lot to drain if you have to end up replacing the pump.


92 Suburban 2500 7.4L 58k M1_0w40 5yr OCI
99 Olds Aurora 4.0L 91K M1_5w30 5yr OCI
13 Dodge Dart 2.0L 30k PP 0w20 OLM OCI
70 Camaro 5.7L 59k
Re: 06 lucerne 3,8 [Re: lucerne06] #4471347
07/26/17 07:04 PM
07/26/17 07:04 PM
Joined: May 2009
Posts: 1,083
ohio
caravanmike Offline
caravanmike  Offline
Joined: May 2009
Posts: 1,083
ohio
Check the rear seat pdc, for the rear seat hitting the fuel pump relay. Well known tsb.


Oils I use: Any 5w-30,5w-20 conventional

Re: 06 lucerne 3,8 [Re: caravanmike] #4471395
07/26/17 08:19 PM
07/26/17 08:19 PM
Joined: Aug 2003
Posts: 2,551
DELAWARE
Hootbro Offline
Hootbro  Offline
Joined: Aug 2003
Posts: 2,551
DELAWARE
Originally Posted By: caravanmike
Check the rear seat pdc, for the rear seat hitting the fuel pump relay. Well known tsb.


What he said.

https://www.youtube.com/watch?v=G4EkAd9B1uA


2018 RAM 2500 Cummins 6.7L (Delvac 1300 15W-40)
2017 Jeep Renegade 2.4L (Idemitsu 0W-20)

Re: 06 lucerne 3,8 [Re: lucerne06] #4471413
07/26/17 08:36 PM
07/26/17 08:36 PM
Joined: Mar 2009
Posts: 453
northeast
lucerne06 Offline OP
lucerne06  Offline OP
Joined: Mar 2009
Posts: 453
northeast
did find one thing today, my coolant resivor tank was about two inches low from its normal spot, I also found indications of coolant leaking from the gasket next to the alternator, same color as my coolant...thinking head gasket...no white smoke, no milky white in oil , no film in coolant resivror..???

Last edited by lucerne06; 07/26/17 08:36 PM.
Re: 06 lucerne 3,8 [Re: lucerne06] #4471499
07/26/17 10:26 PM
07/26/17 10:26 PM
Joined: Dec 2012
Posts: 635
Washington for now
WhyMe Offline
WhyMe  Offline
Joined: Dec 2012
Posts: 635
Washington for now
Originally Posted By: lucerne06
did find one thing today, my coolant resivor tank was about two inches low from its normal spot, I also found indications of coolant leaking from the gasket next to the alternator, same color as my coolant...thinking head gasket...no white smoke, no milky white in oil , no film in coolant resivror..???


intake manifold gaskets. very common on GM V6

Re: 06 lucerne 3,8 [Re: lucerne06] #4473337
07/28/17 07:08 PM
07/28/17 07:08 PM
Joined: Jan 2013
Posts: 2,098
Texas
WyrTwister Offline
WyrTwister  Offline
Joined: Jan 2013
Posts: 2,098
Texas
If you are loosing coolant , also inspect the 2 plastic coolant elbows , between the engine & the serpentine belt tensioner . From there , the coolant goes to the 2 heater hoses .

Do a youtube search .

As far as the fuel pump relay under the rear seat , Eric O. - South Main Auto , has a good youtube video .


Wyr
God bless

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