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Ls1 wont rev over 4000 rpms and die's at random

Old 09-07-2014, 05:30 AM
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Originally Posted by thunderstruck507 View Post
That is also a good point. If I run mine at idle too long with both cutouts open (staging lanes) it will surge and sometimes die. There is about a foot of pipe between each cutout and the collectors.

So that could be the issue with the car stalling out on you, especially if it's mostly occurring when you let off throttle.
The temp fix i have found for this is, turning up the idle to about 750 rpm. Assuming that the extra exhaust flow is keeping outside air from getting to the sensors. It has fixed my stalling and surging. I need to get exhaust soon
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Old 09-07-2014, 09:56 AM
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You would be better off unplugging the O2 sensors, reset the fuel trims and let it run in open loop until there is exhaust piping connected to the headers.
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