(Home) Diesel pump priming

Thanks for the inspiration your site gives!! I have a 2WD Town Ace Turbo Diesel. Took the top of the pump off to cure a leak, and cant get fuel through to injectors. I took top off again and found that hand primer hadnt filled the bowl but primer worked when the top was off. Any suggestions please?

- (#10941) Paul Reynolds, 17 May 04 15:35

Paul,

You may need to loosen the feed(s) at the injectors to bleed any air out of the system. The fuel cut off solenoid has had it connector replaced?

- (#10941) Clive (Bristol), 17 May 04 15:45

Thanks, Clive.Have loosened the connections on three injectors . Unsure about fuel cut off solenoid. Are there any exploded diagrams. Or is that the spring to the pin with a spring? If so, yes but the top did not go back on without rubbing against a piece sticking up

- (#10941) Paul Reynolds, 17 May 04 15:57

On the back end of the pump, the part where the four delivery pipes come out, on top there is an electrical connection to the fuel cut off solenoid. The solenoid itself is in that housing. If this is not connected it will stay shut.
All the diagrams are in the Toyota engine manual, not got mine to hand at the moment as I'm at work.

- (#10941) Clive (Bristol), 17 May 04 16:25

I will have a look tomorrow in the light. Only took the top fittings off though,including the the return pipe to the tank connection. Is it the manual thats available from Toyota dealers?

- (#10941) Paul Reynolds, 17 May 04 17:12

Yep RM025E
If your local dealer does not/will not have it, see Ace Answers - Handbook - Manuals for mail order from Toyota on the Isle of Wight.
If the connection is there, with Ign on, try disconnecting and reconnect it should click open and close.

- (#10941) Clive, 18 May 04 01:01

Could still be the primer bulb. A leaky valve in it might let be OK when there's no load yet fail when trying to pump into the injection pump. You'll need that sorted before you can prime the HP side of things.

What you might want to do is set up a container or funnel above the injection pump and gravity prime it (or even suck on the return fitting...), prime the HP side, get the engine running, then stop and quickly reconnect the filter. That should get you up and running again...

- (#10941) David Miller, 18 May 04 08:30

Thanks, I will keep you posted-when the batterys recharged Wed pm I will try again.

- (#10941) Paul Reynolds, 18 May 04 12:13

no joy in getting fuel to injectors. i believe the primer pump is working as fuel is coming out of the return pipe when disconnected. i've gravity fed the main inlet to the pump and think it is going into the return pipe. i have managed to get fuel out of the return pipe but it is probably already there. initially the work was for the leak on the top seal and i am starting to think something is not back in its correct position - the spring is back on the pin/spring assy and the other back lever seems to be ok. maybe an obstruction and buy the rmo25e....

- (#10941) Paul Reynolds, 20 May 04 14:24

Well, it is possible that you've assembled the governor spring incorrectly; plus as I recall there's one of the levers of the governor lever is a bugger to locate, has to go in behind the boost compensator. Now these pumps don't have an antistall setup, so you SHOULD get at least the starting fuel quantity regardless. But if you've managed to cram the governor link in hard the wrong way, you might just be getting zero fuel requested...

Sounds like it's priming up OK. I'd take the top off and recheck your work. If you in a rush, I'm sure one of us here could scan and email the relevany pages of the book...

- (#10941) David Miller, 21 May 04 00:37

If someone could scan the relevant pages of the book it would be helpful so I could get the job done and her indoors happy and an MOT at last. I will go and buy the book anyway - it will be helpful in the future.

- (#10941) Paul Reynolds, 21 May 04 00:47

An update on events. Managed to blow fuse or relay or something making charging circuit and glowplugs u/s. A crossing of auto electricians palm with loads of silver means they are back again, but I still cant get fuel to injectors. The auto elec did say that the solenoid worked but could still be u/s . I have identified a switch, reference 88610 P acc to Ace Handbook, which looks like a fuel stop switch when accel is pressed too hard. The rubber grommet on the end is falling apart-will this make any difference, or, if I take the lead off will it bypass it? My intention now is to order that and a solenoid switch - I now have a manual - is it worth taking off the delivery valve holders or the distributive head plug?
All suggestions gratefully received before I either scrap the Townie or get another pump - no wonder all the garages I have asked to solve the problem have refused, saying "taken the head of the pump of mate? we just send ours away". Write one hundred times I will not be beat. Its just one of the million David Attenboroughs( trials of life).

- (#10941) Paul Reynolds, 2 Jun 04 12:50

Nope, that 88610 you refer to is the TPS for the aircon. Nothing whatsoever to do with fuel.
Don't open the pump head. (yet...)
So, have you confirmed that you rebuilt the governor correctly? I seem to recall it's possible to connect the link up with the throttle lever 180deg out- it's definitely pulling on the governor when you press the accellerator? And you've screwed the maximum fuel screw back in to it's original setting? (you DID loosen it before replacing the cover, I hope...)

Have you verified that the primer has filled the pump (disconnected return and pumped until no bubbles...)

The solenoid is easy to test- unscrew it, put the plunger back in, and turn the ign. on, the plunger should retract. There's a filter in there that's worth checking too.

After that, if you crank a whole battery's worth with ALL four injector lines loose, you've got to be bled. If not, get a pump...

- (#10941) David Miller, 3 Jun 04 00:56

And I heard a voice in the wilderness and because all the garage men were giving me negative vibes I listened,cos I was also at end of me tether.Thanks David. I have done most of what you said and over the next few days will follow the printout of this link religiously when my battery is charged(her indoors wont have it in the house and is windy about leads outside- I can borrow her car sometimes though). Will update - strange when you take a bit into a Toyota dealer they cant tell you what it is!

- (#10941) Paul Reynolds, 3 Jun 04 10:24