stutaeng
I'm Awesome
Well, today was probably the most counter-productive day of this build. I had bought an LM7 intake manifold a while back to swap. Recall the slightly rich condition (LFTM are around 15% for both banks.) It is due to the L59 injectors having different flowrates than the LM7. The ECU was tuned to base LM7.
I figured intake swap was easier than swapping fuel rails. I took the time to resplice the original LM7 injectors from the harness. Even did heat shrink. Put it back together and the darn thing didn't fire! I was going crazy (fuel pump bad, etc., LOL?!!!), then just decided to do the basic diagnosing...
I checked and had spark, fuel pressure and injector pulse. What the heck!?
Then it dawned on me to pull the fuel rails...with my son cranking I saw absolutely no stream of fuel coming out, neither side. I double checked injector pulse and connections and all was good. Bingo, now what? It's pretty late by now.
I decided to swap back the L59 fuel rail assembly. Screw it, just cut again the respliced injectors and put electrical tape! She fired right up! Went for a drive and everything is back to were I was! LOL.
I don't know if those other injectors are bad, clogged or what.
Option B is to adjust the tune flowrates with HP Tuners.
Truck runs good. Seems like ECU is still able to make adjustments at this fuel trim. I suppose Option C is to just keep on truckin'!
I figured intake swap was easier than swapping fuel rails. I took the time to resplice the original LM7 injectors from the harness. Even did heat shrink. Put it back together and the darn thing didn't fire! I was going crazy (fuel pump bad, etc., LOL?!!!), then just decided to do the basic diagnosing...
I checked and had spark, fuel pressure and injector pulse. What the heck!?
Then it dawned on me to pull the fuel rails...with my son cranking I saw absolutely no stream of fuel coming out, neither side. I double checked injector pulse and connections and all was good. Bingo, now what? It's pretty late by now.
I decided to swap back the L59 fuel rail assembly. Screw it, just cut again the respliced injectors and put electrical tape! She fired right up! Went for a drive and everything is back to were I was! LOL.
I don't know if those other injectors are bad, clogged or what.
Option B is to adjust the tune flowrates with HP Tuners.
Truck runs good. Seems like ECU is still able to make adjustments at this fuel trim. I suppose Option C is to just keep on truckin'!
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