850 T5 - Running issues post fuel-pump replacement

Post by **misha** » 04 May 2021, 15:40

Pinch the return line of FPR while testing the fuel pressure on the rail.
If fuel pressure rises it is not the pump.

Cookeh · Post by **Cookeh** » 05 May 2021, 14:07

Thanks Misha, got a pair of pliers on it and squeezed progressively until it was practically closed. No pressure rise.

Post by **misha** » 05 May 2021, 14:57

At this point....the fuel pump is faulty.

Cookeh · Post by **Cookeh** » 07 May 2021, 15:12

Pulled the Walbro out before giving it the two fingered salute, and stuck a Bosch in. All works perfectly now, nice to see Made in the USA still carries the same heft it used to. It is borderline infuriating that I spent a over a week of evenings trialing everything bar the pump, only to find out its DoA. Makes the £20 premium for the Bosch seem entirely insignificant now.

Thanks for the help, all.

850oldschool · Post by **850oldschool** » 07 May 2021, 16:27

I hope I don't jinx myself by saying that I've gotten about 7 years of service out of my Walbro and that last week I measured it delivering 42 PSI.

Where was the Bosch pump made?

Post by **abscate** » 08 May 2021, 02:48

Pulled the Walbro out before giving it the two fingered salute,

Cultural translation for the colonies. That’s a peace sign turned around , with the palm facing towards you.

The American translation is the same thing with the index finger folded down

Cookeh · Post by **Cookeh** » 08 May 2021, 04:34

850oldschool wrote: 07 May 2021, 16:27 I hope I don't jinx myself by saying that I've gotten about 7 years of service out of my Walbro and that last week I measured it delivering 42 PSI.

Where was the Bosch pump made?

I too hope you arent jinxed too! I certainly seem to attract more than my fair share of bad luck with these things, in fairness. Bosch was made in Ger.

Thank you, abscate, for the translation