Quote from
ltcbm on September 10, 2019, 8:45 pm
i have a stock ls3 with a BTR stage 3 ls3 n/a cam that has a stumble from off idle to wot. It is a severe stumble not a bog. I tried pulling fuel out of the fast accel pump from -10 all the way to -70 and it doesnt seem to effect it very much. It is good everywhere else. I am a EFI tuner so i can usually tune issues like this out ( this is my 8th fitech system to install). I am more familiar with the OEM ECMs but these are pretty simple systems. In the data log it will go a little rich (high 10s to 11s) for a few seconds then lean out. I am begining to wonder if I am getting an ignition side breaking up and causing this. If it was just fuel it looks like leaning the fast accel would help it. I have tried pulling some fast decay also and that doesnt help. Any one else run into this?
i have a stock ls3 with a BTR stage 3 ls3 n/a cam that has a stumble from off idle to wot. It is a severe stumble not a bog. I tried pulling fuel out of the fast accel pump from -10 all the way to -70 and it doesnt seem to effect it very much. It is good everywhere else. I am a EFI tuner so i can usually tune issues like this out ( this is my 8th fitech system to install). I am more familiar with the OEM ECMs but these are pretty simple systems. In the data log it will go a little rich (high 10s to 11s) for a few seconds then lean out. I am begining to wonder if I am getting an ignition side breaking up and causing this. If it was just fuel it looks like leaning the fast accel would help it. I have tried pulling some fast decay also and that doesnt help. Any one else run into this?
