AndysC3

iTrader: (14)

Been having an issue with going rich on decel. Will go to 11-11.5 when I let off the gas. Running the FIC 1000cc injectors and used their tuning data. Attach a log and the tune.

Gadgetized

iTrader: (9)

I ran into this issue too. It is due to the large injectors. Basically the injector is so large that it can't open and close quick enough for the small amount of needed fuel. It can be corrected in the tune, and mine came out pretty good after messing with it. If I get time in a bit I will look at your tune and log as I am currently away from my computer.

AndysC3

iTrader: (14)

any ideas?

BlackGMC

iTrader: (31)

take a look at your Dynamics/Transient fueling tables. There are one specifically for Closed Throttle. Try lowering them in the affected areas...

gavin2005

iTrader: (7)

i recently had same problem along with running rich at idle.i tweaked the short pulse adder and min pulse width tables and it solved the problem

AndysC3

iTrader: (14)

Was reading up and Im thinking that my return line is too small. using the stock return line.

Gadgetized

iTrader: (9)

If you can go key on with engine off and the pressure doesn't creep up, the return is not too small.

AndysC3

iTrader: (14)

it will go to 60psi. and after 5 seconds it will lose all fuel pressure

fossild2

wouldnt that be a check valve issue or fuel pump issue?

AndysC3

iTrader: (14)

Im pretty sure it is. Before I added the Bosch it was find. would go up to 55 while priming then drop to 40 and hold. When I was running the wires for the Bosch a positive wire touched the neg battery terminal and gave a little spark. But I dont think that would cause it.