TD42 Fuel Screw

Joined: 22 Mar 2005 Location: NZ

Hey, easy question:

In regard to the fuel govener screw on the injector pump, by adjusting in which direction it does what?????

Anti-clockwise - Increase fuel??

Clockwise - Decrease fuel??

Anyone given it a tweak to increase the fuel delivery??

How much of a turn did you give it?

Cheers,
Pete.

Joined: 21 Jul 2003 Location: Bucharest, Romania, Europe

counter clockwise it deliverd more fuel. If you tirn the screw half a turn, you get about 10% more fuel...I've just checked theentire injection pump yesterday, at a specialised shop, and I've tried various set-ups forthepump...so finnaly I understood how this s###t is working...

But, my TD42 has a in-line injection pump, not a rotative one...

Joined: 14 Apr 2004 Location: WA

DieselBoy wrote:

Hey, easy question:

In regard to the fuel govener screw on the injector pump, by adjusting in which direction it does what?????

Anti-clockwise - Increase fuel??

Clockwise - Decrease fuel??

Anyone given it a tweak to increase the fuel delivery??

How much of a turn did you give it?

Cheers,
Pete.

Hey Pete, dickin' with the fuel pump if ya don't know wot ya doin' can cause big grief!! Rolling Eyes

Leave it to the specialists buddy, they've got the right gear to monitor all the important parameters to ensure you get the best performance/economy/longevity outa ya motor! Cool

Joined: 13 Jul 2003

Clockwise increases fuel deliverey if it is a rotary ve injector pump. How much you turn the screw depends on how much boost the engine is getting. Other wise it blows lots of black smoke

Gabriel. I don't know wat engine you have but a inline injector pump on a TD42 doesn't exsit

Joined: 04 Mar 2004 Location: Jimboomba

marko wrote:

Clockwise increases fuel deliverey if it is a rotary ve injector pump. How much you turn the screw depends on how much boost the engine is getting. Other wise it blows lots of black smoke

Gabriel. I don't know wat engine you have but a inline injector pump on a TD42 doesn't exsit

I read it that he has fitted an inline electric fuel (diesel) pump (maybe something like a holley pump from a VL commodore) so assist the factory setup. Maybe I'm wrong.

Anyway dieselboy if you are going to "mess" with it yourself, then mark where it is at the moment, then make your adjustments only a quater of a trn at a time.

yes it is going to blow more charf that is a given but depending on what you do with the screw it will also run hotter due to the increased fuel.

Joined: 25 Nov 2002 Location: Golden Square

BIG GQ wrote:

marko wrote:

Gabriel. I don't know wat engine you have but a inline injector pump on a TD42 doesn't exsit

I read it that he has fitted an inline electric fuel (diesel) pump (maybe something like a holley pump from a VL commodore) so assist the factory setup. Maybe I'm wrong.

Pretty sure Gabriel is right. There was a different Injecter pump at some stage or for some environments/countrys. This was discussed when he first put the TD42 in as he was having trouble with setting it up.

Joined: 04 Mar 2004 Location: Jimboomba

No never "in line" so to speak. yes different pumps on the later models (nothing really) but certainly not "in line".

Joined: 25 Nov 2002 Location: Golden Square

BIG GQ wrote:

No never "in line" so to speak. yes different pumps on the later models (nothing really) but certainly not "in line".

Your going to make me go searching now arnt you. The pic of the pump i seen didnt look a thing like the one mine had.

Joined: 04 Mar 2004 Location: Jimboomba

best post up a pic then but if we are talking about a TD42 then no. Although if somebody has proof of otherwise then please post exact details, eg year, engine, etc.

Joined: 09 Nov 2004 Location: Lilydale

I'll find out how to post pics, but I have one of a td42 with an inline pump. I didn't believe it either, but its true.

Joined: 12 Apr 2004 Location: Norway

Traded a few pms with gabriel a year or so back and he mentioned some thing about a heavy duty version of the TD42 engine, with in-line pump, 2 oil filters and 2 fuel filters!!

Joined: 23 Apr 2004 Location: Auckland, NZ

Diesel Boy,
Winding the fuel screw in (clock-wise) increases fuel delivery.

Inline fuel injection pumps also came out on some of the earlier GQ's here in NZ too. We had one for a while before a mate bought it.....has had a turbo on it since new and just ticked over 500,000kms. Don't know what it is about the inline pump, but it is the most fuel efficient GQ I've ever driven.

Joined: 25 Nov 2002 Location: Golden Square

See I wasnt going mad. Well not on this topic. Hopefully these other guys would have a pic handy maybe.

Joined: 27 Jun 2005

Just a thought

Through my experience increasing fuel only produces black smoke and more fuel usuage. No real gain unless forced induction is used Smile

I bought a MK Non turbo troll which had a factory turbo fitted but pump adjusted wrong,, bumped it up a bit,, was all sweet. ANyhoows its got a cracked head now Very Happy

I'll fix that one day!!

Joined: 15 Jul 2004 Location: Wodonga

marko wrote:

Clockwise increases fuel deliverey if it is a rotary ve injector pump. How much you turn the screw depends on how much boost the engine is getting. Other wise it blows lots of black smoke

Gabriel. I don't know wat engine you have but a inline injector pump on a TD42 doesn't exsit

Yes they do exsit, but are as rare as hens teeth, they were fitted to the very early 1988-89 trays and to the middle eastern safaris.

Not many got to Aust before the VE pumps became std.

P.S If you want I will post pics from factory service book to show the pump?

Joined: 04 Mar 2006 Location: england

proberly to use up the supply of left over pumps from the sd33???

Joined: 21 Jul 2003 Location: Bucharest, Romania, Europe

Hi guys!

Well, I do own a TD42 with a in-line injection pump, The car is 1993 made, has 2 oil filters, 2 fuel filters (factory fitting). The pump is a Zexel (Bosch licence), looks exactely like a SD33 pump, but has a vacuum controled regulator, plus a centrifugal regulator above the vacuum regulator. Its trouth, it is a very eficient fuel consumption...in a factory car...now, with the supercharger, more fuel, etc...its consumption is about 15-17 l/100km.

I'll try to insert a picture of the pump.

And, yes, it gave me a lot of headache until now, when I took it out, I put it on the dino and I finnaly understood how its working...

The car was made for countries like Russia, etc. Anyway, the TD42 is VERY rare engine here in Europe. I understood that there a re a few more in England, but here, in Romania, there are only 5 cars with this engine.

BTW, the car came with a PTO winch on it...;-))

Regards, Gabi

Marko, how is your car doing? Did you put the 6.2 chevy engine?[img]

Well, I've tried to insert a pic, but I really can't... When I press the small " img" button, it only insert the [img] bloody think...;-(([/img]

Posted: Thu Sep 14, 2006 6:21 pm

Outerlimits isnt supporting pics ATM, your best bet is to post them to a site like photobucket etc and then link to them.

Layto....

Joined: 23 Oct 2002 Location: Melbourne, Australia

A bit of a dig, but where is the fuel adjuster screw located on the fuel pump?

Joined: 03 Dec 2003 Location: walloon, queensland

MKPatrolGuy wrote:

A bit of a dig, but where is the fuel adjuster screw located on the fuel pump?

Like to know to, have put boost up 10 pound and fitted pyro, needs more fuel now.

Joined: 03 Dec 2003 Location: walloon, queensland

found it
http://www.outerlimits4x4.com/phpBB2/viewtopic.php?t=117867

Joined: 22 Nov 2002 Location: Townsville/Middle Swan WA

did you lose it with your keys? The Finger

Joined: 03 Dec 2003 Location: walloon, queensland

NO, but I don't need the key to wind up the rubber band to get up hills now.

Anybody know what the relief valve is set at on the intake.
idle rpm would be handy too. forgot to look before I wound it up Embarassed

Joined: 26 Mar 2008 Location: Brisbane

Keep in mind if you wind it up too much you willl over fuel it and wash the oil off the bore and start making oil and you will be in all sorts of dramas.I just got my pump moded because you can only get around 20% more fuel out of a standard pump keep this in mind.

Joined: 02 Mar 2008 Location: Mackay Qld

http://www.outerlimits4x4.com/phpBB2/viewtopic.php?t=117867&highlight=

pretty sure its in the bible but anyway.... get a pyro before you go playing to much though.. more fuel = more heat - more heat = melted pistons cracked heads, burnt valves, snapped rods, siezed mains ect....

Joined: 03 Dec 2003 Location: walloon, queensland

pyro fitted before I started playing.

Joined: 16 Oct 2007 Location: Brisbane

Don't!

Take it to a GOOD diesel tuner.

Timing of the fuel delivery is critical to good power development. Just twisting that screw will dump more dumb diesel into it. Unless you can do it yourself take it to a proper diesel tuner who can set it up to suit the boost you want to run - you'll get better power, economy and reliabilty doing it this way.

Unless you take it somewhere who aren't very good at what they're doing like I did. I suspect the mob I went to aren't much chop at tuning naturally aspirated diesels.

Joined: 04 Feb 2008 Location: WA

I have the genuine patrol service manual, the 2 big half-phone book sized manual and it has the inline pump and the VE in there but not the vaccum pump under the injector pump for the post '95 models, so figure that out

Cheers
Dave

Joined: 16 Oct 2007 Location: Brisbane

Means you don't have the updated release notes for the revised vacuum pump location. Razz