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So fuel pressure is fixed. Bad regulator. Problem still exist. Underpower with 4000 rpm max. Feels like your trying to push a mountain with not enough power. Timing is advancing. I’m goi g to do a little more this afternoon with the scannner and snap pics of timing adavance see if it retarding...
Hello folks.
Quick run down. Repowered from a 5.0 GXI to a 5.7 GI. Did buy ECM for 5.7. Also 5.0 ran great and as expected. So yes I broke a good running boat.
Using same wiring harness but as far as I can tell same harness between GI and GXI. FYI 5.0 setup was emmissioned for California...
