Originally Posted by
ZR
- you've confirmed it's a return less pump?
Yes, at least it was sold to me as such originally in 2012
- I don't recall for sure on the '04 n older, '05 up same scenario if ground wire from fpdm is pinched between it and the pump, commands full output from the pump.
This is something I should check, I think I had a wire caught in the hat before
- If answer to above is yes fpdm controls ground side, check to be sure there is not a second source of ground inside the hat / module itself. We've now had two mis made '05 up drop in modules with an internal ground that should not have been there.
Its the factory wiring spliced in I beleive, same as its been since 2012, don't think any wiring has changed.
- disconnect MAF n see if fuel pressure drops. Odd part, some will run with it disconnected and some won't, have seen one with a MAF issue experience high fuel pressure.
Will do sir, thanks