Motorsports-X
OBS Enthusiast
My truck, at idle, is ******* both the fuel trims. Bank 1 a bit more than bank 2. The engine is built and i expect Some demand for more fuel but not 75% at idle. Removed the bank 1 exhaust pipe after the collector to replace the trans cooler line and the pipe was very white. It looks very lean to me. I'm leaning towards the fuel pump being a problem but it wouldn't surprise me if i need new intake and header gaskets to.
I also think at the top end, the engine might be out of injector. It goes lean up there.
Does anyone here with a built engine know what kind of fuel trims i "should" be expecting at idle. And also what the factory injector actual rate is?
Lots of bugs. Trying to work them out. 411 swap is a significant upgrade in terms of visability to whats going on. And right now things arent adding up.
I also think at the top end, the engine might be out of injector. It goes lean up there.
Does anyone here with a built engine know what kind of fuel trims i "should" be expecting at idle. And also what the factory injector actual rate is?
Lots of bugs. Trying to work them out. 411 swap is a significant upgrade in terms of visability to whats going on. And right now things arent adding up.