Injector duty cycle up and down at WOT
Thread Starter
Staging Lane
Joined: Nov 2004
Posts: 66
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Injector duty cycle up and down at WOT I posted in the pcm section maybe ill get a better response here.
I'm having an issue with a 09 LS3 Vette with a Procharger on it since I swapped from stock injectors to these 72 lbs/hr. Heres a little history.
Installed Procharger. Ran it for a weekend with stock injecotrs and did not have this issue. Swapped to bosch 105 high impedence and started having this issue. Thought it was the injectors so went to FIC 72lbs same issue. Car will idle fine and drive perfect but as soon as I go wot, regardless of RPM, the car will either cut out or buck back and forth. In the log the injector dc is wavy fluctuating from 50% to 40% and so on. Or it will start to climb hit about 60% and then the car will hit what feels like traction control. When it does that the duty cycle reads 60% then falls to 20%.
I believe its something in the tune because as I play with the IFR table it will get better and worse but I am maxed out@ 127lbs/hr before its perfect and I feel I should not be raping tables to get this injectors tuned correctly.
Any help would be appreciated, thanks.
I'm having an issue with a 09 LS3 Vette with a Procharger on it since I swapped from stock injectors to these 72 lbs/hr. Heres a little history.
Installed Procharger. Ran it for a weekend with stock injecotrs and did not have this issue. Swapped to bosch 105 high impedence and started having this issue. Thought it was the injectors so went to FIC 72lbs same issue. Car will idle fine and drive perfect but as soon as I go wot, regardless of RPM, the car will either cut out or buck back and forth. In the log the injector dc is wavy fluctuating from 50% to 40% and so on. Or it will start to climb hit about 60% and then the car will hit what feels like traction control. When it does that the duty cycle reads 60% then falls to 20%.
I believe its something in the tune because as I play with the IFR table it will get better and worse but I am maxed out@ 127lbs/hr before its perfect and I feel I should not be raping tables to get this injectors tuned correctly.
Any help would be appreciated, thanks.
