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Unfortunately I bought that set second hand already assembled in a hpfp a while back while I was still building my engine. It is what it is at this point, am just hoping this resolves my fuel pressure loss so we can move to port injection and then ethanol blend! Will report back tomorrow once I...

Figured I’d give an update. The new auto tech internal kit got delayed in shipping. Will be arriving Thursday. I did however take the hpfp apart and inspected the internals. There is some noticeable wear on the shaft but passes the fingernail test. However I did also notice that the shaft does...

I actually came across your post in other forums of using naphtha fluid to clean/ redline to prime it and followed that procedure when rebuilding the pump in a spare hpfp housing with Rey’s ethanol seals. Only thing I reused was the auto tech internals from the pump and put them in a spare hpfp...

got a 3x15” hydramat installed in my itfp, still having the same issue. Filled up the fuel tank fully and did another 3rd gear log, no changes based on datalogs. Am going to pull the hpfp off again, I have a brand new auto tech internals set coming tomorrow and going to swap them out as the set...

I I don’t believe it is the fprv, freektune got back to me this morning. based on the datalogs, he believes it is due to the itfp either starving of fuel or leaking at one of the connections. Am going to summit currently to pick up a hydramat to ensure the fuel pump stays submerged. That seems...

pressure built up to 1750 psi and still slowly climbing before I stoped monitoring it. It did not release the pressure. I’m assuming it’s because the relief pressure is at 1850psi for the fprv.

Yes, pressure climbing up slowly.

Hpfp is being fed from a y split in the engine bay. Setup is 6an line from ITFP basket to engine bay, 6an to double 6an y split, one line goes to hpfp feed, the other goes to the PI fuel rail, exit side of fuel rail has the fpr, exit of fpr goes to the ethanol sensor and then the factory feed...

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...

I believe I have all the ground points sorted out which are the ones I attached pictures of. Ended up finding out that my pcm is not sending a ground signal to the injector relay when ignition is on hence the injectors will not fire when trying to start. I ran a temporary ground wire from the...

hello all, i am in the process of installing new engine in my 07 mazdaspeed 6. currently having an issue with no voltage to injectors. i traced it down to not having ground at the injector relay in the engine bay. i ended up running a ground wire from the negative terminal on the battery to the...