Engine dies after releasing gas pedal.

[jessea1supercars]

Project is a 1971 chevelle with Ls3 swap using atomic efi ls kit.



Car starts up perfectly find and sound like all power is there. Only problem is car shuts off when idle drops. Cant even give it a bit of gas because as soon as throttle is released the car stalls. I have done the latest software update but no difference was made with the problem. Fuel pressure and spark are great.



Anybody experience this before?

[msdtech1955]

What is the target idle rpm?





msdforms@msdperformance.com







Latitude: 31.730125
Longitude: -106.29673

[jessea1supercars]

775

[msdtech1955]

automatic or standard ....?



msdforms@msdperformance.com







Latitude: 31.730125
Longitude: -106.29673

[jessea1supercars]

automatic tranny that is

[msdtech1955]

we need to turn the adjustment screw on the throttle body a half turn .







the plate is closed and will not allow air to pass by ...









msdforms@msdperformance.com







Latitude: 31.730125
Longitude: -106.29673

[jessea1supercars]

i have tried that but it wont seem to help it at all.

[msdtechsupport3]

What does the TPS read on the handheld while in the rest (idle) position, and WOT (floored) position?



This can be done without running the engine. Just ignition on.

[msdtechsupport3]

Is this a stock or performance cam?

[jessea1supercars]

At idle tps reads 1% and at full it reads 63%



and it has a performance cam.