timsnider72

My car: c6 2010 ECS 1500 kit, blower cam, headers. Ligenfelter fuel pump (because car leaned out around 4K and I needed more fuel)

my Problem: Car sometimes starts up on first rip, but usually doesn’t. It takes until the second go around and it starts right up. Is the problem in the tune, the fuel pump or is the problem because I haven’t put in Ls9 map sensor. I’m running stock map, but I’m changing to the ls9 map this weekend. Im not super experienced yet so be easy lol.

I just need rhe car to start up on first rip. Lol

russ472

i would check your fuel pressure to see where it is at after the first prime before starting. If your check valve is letting the pressure bleed down too much while it is shut down, it may be taking up to the 2nd try to build the pressure you need.

Garymorris

You are aware that you can't just change the map sensor without changing the sensor calibration in the tune right?

Andy@A&ACorvette

Check the cranking VE in the tune. (after verifying fuel pressure) That gets forgotten sometimes. Start at 75% and go from there. The bigger the injector the lower that table needs to be.

timsnider72

I’ll try those things tonight, and yeah I know I gotta adjust the tune as well

DOUG @ ECS

Did you get a start up tune file from me? If not I'll be happy to send you one.