Rogi
Silver Member
My ms6 is having a fuel rail pressure loss past 5,000rpm. A little background of the car:
built engine with around 600 miles.
6262 turbo.
return style fuel system with aeromotive fuel pressure regulator,
base pressure set at 40psi with rising rate,
Walbro 525lph ITFP with new stainless steel strainer, fuel pump has hardwire kit installed ,
Fuel pump resistor bypassed,
autotech HPFP internals,
6AN fuel feed line with stock fuel line as return,
radium venturi pump,
BeCuse injector seals with cleaned injectors,
New OEM FPRV,
damond Port injection with focust st manifold,
ngk 6510 spark plugs gapped at .022 per freektune recommendation,
compression test: 186, 185, 183, 186.
Currently the car is getting tuned for Direct injection only currently by freektune, it will hold steady 1700ish psi and then steadily dip down 700psi by 6000rpm. i have rebuilt the hpfp with reys ethanol safe seals along with taking the autotech internals and swapping them into a donor housing, new OEM FPRV, KOEO test showing fuel rail pressure climbing and holding psi. still having the same issue. Car runs great below 5000rpm, idles and start up normally with no issues. I am running out of ideas on what else could cause this issue, ordered a new autotech internals kit and going to swap them in once they arrive. i have attached some data logs of the issue. any feedback is greatly appreciated .
built engine with around 600 miles.
6262 turbo.
return style fuel system with aeromotive fuel pressure regulator,
base pressure set at 40psi with rising rate,
Walbro 525lph ITFP with new stainless steel strainer, fuel pump has hardwire kit installed ,
Fuel pump resistor bypassed,
autotech HPFP internals,
6AN fuel feed line with stock fuel line as return,
radium venturi pump,
BeCuse injector seals with cleaned injectors,
New OEM FPRV,
damond Port injection with focust st manifold,
ngk 6510 spark plugs gapped at .022 per freektune recommendation,
compression test: 186, 185, 183, 186.
Currently the car is getting tuned for Direct injection only currently by freektune, it will hold steady 1700ish psi and then steadily dip down 700psi by 6000rpm. i have rebuilt the hpfp with reys ethanol safe seals along with taking the autotech internals and swapping them into a donor housing, new OEM FPRV, KOEO test showing fuel rail pressure climbing and holding psi. still having the same issue. Car runs great below 5000rpm, idles and start up normally with no issues. I am running out of ideas on what else could cause this issue, ordered a new autotech internals kit and going to swap them in once they arrive. i have attached some data logs of the issue. any feedback is greatly appreciated .
