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Discussion Starter · #1 ·
Little background on issue:

Last trip to track a fuse blew for a fuel pump. At the 1000' mark car lost fuel pressure, it dropped to 17 psi. before I noticed and got out of it. After a couple hours of searching to find what happened I noticed a blown fuse. I replaced fuse and everything was fine. It had a slight miss at part throttle after this so I ordered a set of Brisk 2 heat range colder plugs to replace the Brisk 1 heat range colder plugs that were in car. I am running 21 psi. on street tune now so I thought the 2 degrees colder plug would be a better setup for that amount of boost.


The problem since:

It ran fine after plug install for a couple days. I let the car sit for 3 days while I went offshore. When I got back I started the car and it ran for 10-15 seconds then died. I tried restarting and it just turned over but wouldn't start. It had a fuel smell from the exhaust so I stopped trying to start it and let it sit for 45 minutes. When I tried again it was the same results so I pushed accelerator down to kill injectors and after a couple seconds it fired over and died. I did this a couple times until it started and I revved it up to 3000 rpm's, when I was holding the accelerator down it was smoking really bad and had a miss. Finally after a couple seconds (15-20 seconds) it smoothed out and ran fine. I drove car home and when it cooled off same thing happened again. I tried it again this morning and couldn't get the car to start at all.

I appreciate any advice you can give me on this as I am pretty fed up with it and thinking about selling, parting out, or trying NA. I am close to going buy a new GT500 and starting over if this keeps happening.

Here is a list of mods I will paste from my computer:
Larry_H 302 Stroker
Livernois St. 3 Heads
BBR St. 2 cams
Mod Camponents VCT Lock Out Sprockets
Dynatech Longtubes with TPS Custom 3" X-Pipe dumped before axle
2.6H Kenne Bell with 2.75" upper (21 psi.)
FB Performance 4STB-E with OD, TB, and LU 4500 rpm stall
Currie 9" with Detroit Locker and 4.11 gears
Brisk 3VR12S sparkplugs
^ Complete list in garage
 

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2011 September ROTM
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what codes are there??? i had the same issue two days ago and it ended up being the lower plug in the pcm wasn't all the way in. pulled it out cleaned it up and pluged it back in and everything is fine now
 

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When it is parked does your fuel pressure bleed off real fast? It sounds like it's flooding for some reason, maybe a sticking injector. Next time when it won't start pull a coil off and check for spark too.
 

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Discussion Starter · #5 ·
Dude, I know this is probably a stupid question...what's your plug gap? And what would you ask for the whole car, should you sell it?
gap is at .028". If I sell probably $20k that would get me money back on trans, rear end and shortblock.

what codes are there??? i had the same issue two days ago and it ended up being the lower plug in the pcm wasn't all the way in. pulled it out cleaned it up and pluged it back in and everything is fine now
no codes are showing. I'll check that when I change plugs.

When it is parked does your fuel pressure bleed off real fast? It sounds like it's flooding for some reason, maybe a sticking injector. Next time when it won't start pull a coil off and check for spark too.
I'll check it tomorrow when I get new plugs installed. I'm not sure on fuel pressure either, I'll have to datalog it.
 

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I know you have a totally different animal but i had a small fuse blow in the engine bay, The car cranked but wouldn't start for ****.Thoroughly checked, found that fuse also gave power to my intercooler pump.A little blue fuse,my buddy pulled one out of his truck put her in problem fixed,she stated up and intercooler but circulated be sure all electric devices are working.Hope that helps.
 

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Discussion Starter · #7 ·
Found the problem!!!!

Seems as if #3 battery since April 2008 has crapped out. It was dropping volts trying to start and reseting the ECM. When ECM would reload it would dump fuel again and again and again. After new plugs it started doing the same thing as before even with a tune with 15% fuel pulled out at idle. I jumped car off with my Titan and it cranked right up. Tried cranking off battery and it would be rich and die. Just got back from getting alternator tested and it passed with flying colors so its the battery.
 

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The Despised Vert
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Thank god you found it... I was going there because we had a similar problem with mine.. You ain't gonna sell it... you know it... get a GT500 then what.. more power... just get a Cobra Jet and be done with it...lol....
 

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Discussion Starter · #9 ·
Yeah, I'm actually heading to TPS this morning with the 2.5" pulley in the car. We are going to try a 25 psi. race tune. We are also going to go through the car and see if we can clean/fix anything.
 

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heading to TPS this morning
Damn it. You're going to be in the 9s...before me. NPR is back open.
 

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The Despised Vert
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Get some video for us snowed in peeps... 14"on the ground and 4 deg outside...
 
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