Outer Limits 4x4 Board

My 2H is running extractors, larger exhaust and snorkel. It gets excellent economy (averaging 11-12L per 100kms) and only blows black smoke visible in the mirrors when I rev it to nearly 3000rpm. It also is gutless, even by 2H standards. I suspect that it is running on the lean side.

I would like to make a minor adjustment to the volume screw on the injector pump to increase the fuel slightly to compensate for the better breathing and improve the torque. My problem is that my (Toyota and Gregorys) manuals don't tell me which screw it is.

Can somebody please help me identify exactly which screw on the pump is the fuel volume adjustment (I don't want to touch the timing). If anyone can assist with this (pics would be great!) and advise how (which direction and by how much to turn it) to adjus the fuel...that would be great.

Cheers

give me a ring and i will tell u how to make it go better .
07 54827077

the volume screw is on the back of the pump, it is retained by a locking ring with three holes in it - you need a special three-pin wrench to unlock the ring (or you can probably get it with a screwdriver). work in half-turns. counterclockwise = richer.

There are a few screws on the back of the pump with sealing wire...is the volume screw near the top of the pump?

Diesel 60 wrote:There are a few screws on the back of the pump with sealing wire...is the volume screw near the top of the pump?

that's it, near the top, away from the engine.

Thanks mate, I'll have a fiddle with it and report back.

The volume screw is the one that tells the pump where the run position is, on the stop, run and over injection lever that is connected to the EDIC motor.

Loosening this screw moves the run position closer to overinjection, which boosts your overall fuelling...screwing it in moves the run position on the lever closer to the off position, thus less overall fuelling...

Correct me if i am wrong dumbdAnce.

Ok, now it's starting to annoy me. I've identified the screw, but can't get the lock washer to budge. I haven't got any tools that will fit and it just won't move.

any suggestions?

piece of flat steel....drill and tap 3 small holes that will fit the lock nut pattern. Fit 3 small bolts and there you have a lock nut tool....sounds simple enough.

carts wrote:piece of flat steel....drill and tap 3 small holes that will fit the lock nut pattern. Fit 3 small bolts and there you have a lock nut tool....sounds simple enough.

yes, can I have my one back pease?

Yep, but in my carport last night, with no pieces of flat steel handy, I was getting the sh*ts.

I'll have to have a fiddle over the weekend.

dumbdunce wrote:

carts wrote:piece of flat steel....drill and tap 3 small holes that will fit the lock nut pattern. Fit 3 small bolts and there you have a lock nut tool....sounds simple enough.

yes, can I have my one back pease?

what tool? i dont have one for a 1hdf-t...