Chevelle Tuned Min Inject Change.hpt
Tune is above. I have a 2004 LQ4 that I just installed a LS2 intake and injectors on.
I updated the tune to have the injector data. I upload the tune, go to crank it up and the engine just turns over and over without a hint of starting.
Any tips?
I change the injector flow rate vs KPA, Short Pulse Limit, Short Pulse Adder, Min Injector Pulse, and Default Injector Pulse. I did not change anything else in the tune.
I have fuel pressure at the rail
IT IS NOT GETTING FUEL - I checked this by spraying starting fluid into the TB, cranked it over and it fired up right away then died after a couple seconds.
UPDATE - The injectors ARE getting power. So this must be due to the tune? unless all of my injectors are bad, which... blah
SOLUTION:
I pulled the fuel rail off with injectors attached, put some paper underneath everything to see if fuel was coming out of the injectors - cranked it over and saw NO fuel was coming out. So I know they are getting power, but none are firing.
I used a needle and pierced into each ground wire for the injector and grounded that wire for 1 second intervals - initially they did not spray, but after the 2nd interval they started spraying perfectly. I did this to all injectors - re-did the paper test and saw all were spraying fuel now.
Bolted fuel rail back on, cranked the engine and it fired right up no issues at all.
Summary: Fuel injectors must have been sitting around for a while, just needed a kick to get back going