Thread: Nothing when stopping in 1st. TDi

Originally Posted by gibbs

I found this thread about removing the lift pump

TDi owners do this now!!!

Do you think i should do it?

No.

The lift pump is needed to provide a positive head to the injector pump.
Many drivers are only aware of its existence when their vehicle displays sluggish performance as the injector pump doesn't/can't always pull the required quantity of fuel up from the tank.

Removing it entirely is dumb.

Replacing the mechanical pump with an electric one is fine, and really helps when bleeding the fuel system.

Pedro, yes, the lift pump is the one that can sometimes fail when the priming handle is used to prime the system. Never had it happen and I still prime after a filter change, but plenty have had it fail prematurely.

Clean out the water seperator and change the filter and if no change do the lift pump,lift pumps can split thier diaphrams causing loss of pressure,its common.I fixed a grader that was loosing power because of this not long ago. Pat

It looks like the previous owner got wind of the lift pump thoery and pulled it out. Iv got a 5 inch piece of hose there instead.

I will change the filter and clean out the water seperater. Is the water seperater the small silver tub looking thing with a lever on it that the deisel travels through before it hits the filter?

Pat, by do the lift pump do you mean remove it or replace it?

Originally Posted by gibbs

It looks like the previous owner got wind of the lift pump thoery and pulled it out. Iv got a 5 inch piece of hose there instead.

I will change the filter and clean out the water seperater. Is the water seperater the small silver tub looking thing with a lever on it that the deisel travels through before it hits the filter?

Pat, by do the lift pump do you mean remove it or replace it?

The small silver tub looking thing with the lever on it is the lift pump,the water seperator is in the rear left side wheel well,before you take it off buy the ''o'' rings for it and a new plug.Don't remove the lift pump,as Rick said it gives the injector pump a constant flow of fuel. Pat

and if you do replace the lift pump, remember to order new olives for the fuel lines too.

So far I've found the Delphi one to outlast the OE type although others may have found differently, (Some Delphi bits can vary a lot in quality) and they incorporate a small screen in the top of the pump, just a little more protection, (or more things to block, depending on your POV)

Hey Gibs!

IF

you decide to replace the lift pump,,

take heed of Ricks last paragraph(top of page)

Hey guys a quik update.
After searching around the net i come across a guy with similar probs, his solution was in the fuse box behind the battery. I checked my fuse box and the 2 fuses on the ends were mixed up and on the opposite side they were meant to be on. I changed them to the correct positions and turned the key from the outside without touching the gas pedal. It turned over 4 or 5 times before kicking over but now it starts up after only a few turns like a normal car .
The pause on the throttle is only slight now, and she seems to have more power and can excellerate up hills in 5th and hasn't stalled on me since. Im gonna do a full service on her including all the filters and fluids and clean out the water seperater which will hopefully irradicate the problem all together. If not i will change the lift pump, glow plugs and injectors (hopefully not injectors they are expensive) in that order. Crossing my fingers it doesn't come to that.

WTF ?

A 300Tdi is mechanically injected, unless you have that incredibly rare beast in Oz, an EDC version.
Does your injector pump have a black box with wires coming out of it on top of the pump ?
Does one injector have a wire/s going to it ?
If so, a simple battery disconnect/re-connect may have fixed your problem.

I've not heard of an EDC injected 300Tdi in Australia ??
If yours is "normal" like everyone else's here, swapping some fuses won't have done a thing.......