Walbro E85 Pump, Is Mine Genuine?

[SiR_RB]

taken ur pump out to inspect the sock filter? might be blocked?

I checked mine last week after afew months of running e85 and it was spotless, chucked a new fuel filter on too to be safe

[linkems]

good point about the fuel pressure gauge if the there is blockage the pressure should of dropped which it didn't was still at 55-56psi. The old strainer looked clean as well.

Any way new pump is on pressure shot up near 60psi, giving afr of about 16-17 idle. I dropped the fuel pressure back down to 55psi and afr went richer to about 15.8, still a fair bit off the usual 13.8ish that im supposed to get.

I've considered the possibility of injectors but the difference in EGT from cyl 1-3 and 4-6 is same as they have been in the past.

Does any one know if intake leaks on a map sensor based ecu would contribute to running lean?

[scotty nm35]

Definitely, my tune went to crap and all I had was a tiny split in the Map/Reg vac hose.