joey3002

ok, this just started happening 2 days ago. Its a 2007 SS. After driving for about 30 minutes, I turn the key off, pull it out and the engine is still running.. it runs for about 3-4 seconds, then turns off. What the heck could possibly cause this? a relay?

Thanks a ton in advance...

Jeffs 06SS 2.4

Was it running normal or kinda sputtering? I know if you use low octane gas in something that requires higher octane it will keep sputtering after you turn it off. That is called "dieseling". If it is sputtering and not just running normal, I would say you are using too low of octane.

joey3002

I actually been putting 89 in it. However, I just filled it up with 91 (highest they had)

Its not sputtering, sounds as if its normal. Today when I pulled into work, it kept running so i punched the gas, it revved up, then revved down, then shut off.

Spectral

if you have a supercharged please do not put 89 in it EVER.

joey3002

going forward, i will use 91+

Jeffs 06SS 2.4

If it revs up after you pull out the key, thats not what I was talking about. Thats weird, I wouldnt know what it could be. I mean, your ignition has to still have power going to the coil packs or whatever these balts have to keep it firing, so somehow your ignition is staying on.

joey3002

Im going to check fuses at lunch. Which should I be concentrating on? the fuel relay.. what else?

Jeffs 06SS 2.4

I'm no expert man, so I really dont know. Maybe you could call a gm service center and see if maybe they do it for a reason. Thats pretty strange though because it only runs a few seconds and then quits like there is a delay in the ignition.

06BrandonSS

My 1st 06 SS/SC I had did similar, I'd turn it off and it would take a few seconds for the car to actually turn off completely, but slowly dying for those few seconds. My now 2nd 06 SS/SC does it every once in a while but not as often as my red one did. Think it's normal just don't let the clutch out until its completely off obviously.

forced_induction

i have no idea, defiantly go to a dealership and have them look at it. but you should see how far you can drive it after you pull the key out just for fun

northvibe

iTrader: (1)

91 is the lowest you should go. Use 91 after a week or two let us know how its working.

joey3002

lol, I always put it in neutral.

northvibe

iTrader: (1)

you dont leave the car in gear when you park it?

joey3002

no, i park on flat ground and use the ebrake... why?

RecklessL61

iTrader: (2)

i never do i put it in nuetral also just habit i like just hitting the clutch and letting it off when i start the car, i use my ebrake for parking

northvibe

iTrader: (1)

because if the ebrake fails...you're screwed. Its a very common in the manual world to leave your car in gear with the ebrake on, hill or flat.

ShortStack

^^ I used to have automatic start up on my car... so i have to leave it in neutral.

06_SIC_SS

iTrader: (6)

it just wants to be driven more duh

ChevyMgr

If the engine was cold I would say it is residual fuel in the manifold and the computer is waiting to see zero rpm's before it commands a complete ignition shut off. But you say 30 minutes of driving so the normal extra fueling for a cold start should be long gone. Is the check engine light coming on? If so what codes?

joey3002

I think I know the issue.. I think when installing an amp, my cap was not fully discharged. It arced and a switch i put in the car to totally disable the sub amp (for when I got the kids) shorted. Not sure how it would affect what I am seeing but.. when the switch is off (still lit mind you) it doesnt do this but when its toggled on it does.