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Old 11-13-2006, 06:41 PM
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Default Stumbles/Stalls.

I've recently "fixed" all known issues, and have completed my LS6 Intake swap..

Recently, if I go WOT and then just slow to a stop, the car might stall out.
If I go WOT and cruise back down to about 40-50mph the car is "sloppy" and stumbles, I can cruise or feed it more peddle and after about 10-15 seconds it clears up and everything's normal again.

The car is showing no codes.
Old 11-13-2006, 09:04 PM
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check your vacuum hoses, and make sure that brake booster hose is in good....it kinda sounds like a sort of leak, also...did you leave the ls6 or ls1 injectors in?
Old 11-13-2006, 09:10 PM
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LS1 injectors. Brake booster is secure, PCV hose has been replaced with new hose as well.. Not to say that it isn't a leak, but the car idles fine and under the hood there's no sounds of a leak.

If I disconnect the pcv hose the car idles bad, but doesn't stall..
Old 11-14-2006, 09:27 AM
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This morning the issue occured on my way to work, I was slowing down for a stop light and around 15-20mph the car died. I didn't go WOT at anytime before this occured.
Old 11-14-2006, 09:57 AM
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There are 2 connectors in the wiring harness for the coil packs (one on each side of the engine). Make sure that both of these connectors are snapped in all the way. It is very easy to NOT get them snapped in all the way. This happened to me also after an intake swap and that fixed the problem.
Old 11-14-2006, 10:39 AM
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I will double check those two connections, but since I didn't disconnect them I don't think that would be the problem..

Also, when the car stalls like this morning, it is very hard to start, I feed it gas and it stumbles a bit, rev it up a few times and within the 10 or so seconds it's back to normal idle/driving.
Old 11-14-2006, 05:54 PM
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Firmed up those connections, was idling at about 10-15mph, and car died out, no brake was applied.. Still no codes, no SES light either. =/
Old 11-14-2006, 09:58 PM
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All I can think of then is a vacuum leak. Check all your vacuum lines.
Old 11-15-2006, 06:36 AM
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I'm not doubting a possibility of a Vacuum leak, but the car otherwise idles normally.

Any other ideas?
Old 11-15-2006, 07:53 AM
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I've also noticed that when I'm at a point where I need to slow down (red light/traffic/speed bump) if I apply my brakes while keeping my rpms 1k+, the car doesn't seem to experience this stalling/stumbling issue.
Old 11-15-2006, 06:09 PM
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Any more ideas, anyone?
Old 11-17-2006, 07:45 AM
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Still looking for ideas...




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