Sluggish when cold

[11redrex]

Is it possible you can get some photos on here as to where the Mech Inj Pump has been coupled up to electrically?

Obviously the stop solonoid isnt connected to where it ought to be!! Goodness knows if the advance sol. is connected to anything???

Rev counter could be trickier, depends on your mechanical ability....

Nothing electrical connected as far as I can tell. I'll have a better look tomorrow in the daylight.

Mechanical ability ? Three/four spanners, according to the haynes books. Just a spanner, according to my missus.

I've got an idea what the solenoids are and what they do, more explanation would be good though.

 

[11redrex]

one more question, and I'm sure it won't be the last by a long shot. Will the TD pump be restricting the power ? As in the horsey power ?

 

[Timbo_1975]

A TD pump with TDI injectors on factory settings should still give somewhere around 100hp, assuming the rest of the thing is working as its maker intended.

Handily, you can turn them up. ) <however get it running properly FIRST>

Stop solonoid needs to be connected to a switched live, via a 10A fuse. Something is not right here given you say you have a switch off delay.
Advance solonoid needs power only during cranking, so T it into the starter solonoid supply.

 

[11redrex]

You might think I'm being deliberately thick, but following my abandoned attempt at wiring fog lights up earlier in the year, this is just to be 100%.
I need to connect the stop solenoid to a power source that is only live when the ignition is on, via a 10 amp fuse.
and the advance solenoid needs to be connected to the live feed for the starter solenoid.

So which one's which ? Should they have wires coming off them ? If so do you know what colour ?

 

[BIGSEAN]

I might be being a bit thick here, but by advance solenoid do you mean the injection advance solenoid? , the one directly below the fuel cut off ?

 

[Timbo_1975]

Stop solonoid is the top one points vertical between the injector feed pipes.

The other sits at the bottom of the pump horizontally.

Can we get some photos, please!!

 

[11redrex]

Will do, as soon as the missus gets home. Camera's buggered, don't have a lead for my phone, and she's got her phone with her.

Timbo could you explain to me how the solenoids work and what they do please, in layman(thicko) terms. :augie

 

[geoffdown]

Will do, as soon as the missus gets home. Camera's buggered, don't have a lead for my phone, and she's got her phone with her.

Timbo could you explain to me how the solenoids work and what they do please, in layman(thicko) terms. :augie

Stop solenoid stops fuel flowing and advance solenoid advance or retarded the timing on the pump I think diesel starts better cold when timing is retarded might be wrong

 

[BIGSEAN]

In that case the advance solenoid is needed throughout, not just on cranking.
The stop solenoid is a simple on off affair, when energised it allows fuel to flow.
On the other hand the advance solenoid is energised by pulses from the ecu to
alter the timing that the fuel is actually injected, if this is incorrect (as mine was)
your starting and indeed running is very bad. In your case with your particular pump you should not have a problem
the advance system on yours is mechanical not electrical. not sure about the stop solenoid, but if it has one
it is a simple affair to wire up.

 

[11redrex]

Cheers Geoff, that's what I thought about the stop solenoid, powering it up opens it and switching off closes it. Doesn't hurt to check though
I suppose if the injection timing was retarded, that would mean there was sightly less diesel going through, and it would burn quicker but wouldn't give enough power to drive to car (sounds like the symptoms caused by the filter being clogged doesn't it).

I'll have to look into this further but it sounds like my stop solenoid is permanently open. Could be wired up wrong ? Also if the advance solenoid is wired wrong, or not at all, the ignition may be retarded all the time, which would explain the lack of maximum power ?

 

[BIGSEAN]

http://lh3.ggpht.com/_Ii1ukGkfijY/Sqo2MWH_npI/AAAAAAAADIs/yFxptX_Rl4g/clip_image002_thumb.jpg
Not sure if this is your exac tmodel, but the stop solenoid is in the same place.

 

[BIGSEAN]

http://fluidworld.net/index.php/Topic/view/id-1984
gives a better description than i could.

 

[11redrex]

thanks sean (or should that be mr big?) can't see any wires attached to the pump, althogh visionis very restricted. there is a fairly big red wire going in the general direction of the pump, but I can't see where it ends up. blue wire coming out of the same outer covering as the red one and going into the loom at the top.
Best thing I can do is get my camara sorted out !

 

[BIGSEAN]

Will take a pic of mine that i just removed later today, but as i said earlier the only cable on yours should be the black and white cable to the cut of solenoid, the pump is wholly mechanical. As a poster said earlier the only cabling needed to be done will be to the shut off, which will need to be connected to a circuit that is live when the ignition is on.
Might be worth putting a meter on the blue wire to see if that is the correct cable for your shut off .

 

[Timbo_1975]

For cold starting timing must be ADVANCED. That is why we power the solonoid during cranking. (very basic system) It overrides the automatic system.

At idle timing is then at a base figure, then it advances *automatically* as revs and load rise. This is a function of case pressure and the advance piston within the pump...

 

[BIGSEAN]

Sorry Timbo, the early pumps are purely mechanical in this respect

 

[BIGSEAN]

But will hold my hands up in this respectif i`m wrong, i did a lot of research about the mechanical pumps during the troubles with my pump. Being very close to doing the conversion myself, the pumps i looked at (which i assume to be the same as redex`s only had the stop solenoid electrically activated.
Again I apologise if the info i have given is incorrect.

 

[geoffdown]

For cold starting timing must be ADVANCED. That is why we power the solonoid during cranking. (very basic system) It overrides the automatic system.

At idle timing is then at a base figure, then it advances *automatically* as revs and load rise. This is a function of case pressure and the advance piston within the pump...

Sorry no I would get it wrong way round

 

[Timbo_1975]

Ahh well goes to show the only TD pumps i've examined have the 2nd electrical connection!

 

[11redrex]

couldn't see anything in there, had to leave it this morning and hoped the mechanic would be able to get in there and tell me, but he didn't turn up.