Ultimate ls
I am a shop owner I have installed many fitech throttle body units with no problem, I figured I would give the ls multi port system a try on my next ls swap. Installed system, I had no spark fitech help had me chasing my tail with grounds and power harness issues. Then I get someone on the line that talks me thru a reprogramming procedure and it fires up. Now I have a hard starting issue and when pressing accelerator I get a good response the first time then it will not rev and pops a cracks. System is running lean with nothing changing even if I drop target afr. I really am not sure what to do. No fault codes its almost like tps and or map is off
It is the kit 500hp came with hyper fuel pump 6.2 with a large comp lsr cam and 4l60e
Any hep or advise would be great
There are adjustments through the touch pad to add starting fuel and for "accelerator pump". It sounds like you need to change them around a bit.
Have you confirmed good fuel pressure when running? I suggest a 0-100 psi gauge on the fuel rail.
Ok have not confirmed fuel pressure while running will do so tonight.
I've got very little fuel pressure I don't have access to a fitting to install gauge but it's on the way.
I have in tank retrofit pump that came with kit.
??
Quote from obiesolskool on July 18, 2019, 1:31 pmI've got very little fuel pressure I don't have access to a fitting to install gauge but it's on the way.
I have in tank retrofit pump that came with kit.
??
Are you saying you have very little fuel pressure?
OR
You won't know your fuel pressure until the fitting arrives?