Jamo36599
New Member
Here's Some pics of what I did to my injector pump
just a word of warning, if you do these mods be aware that you could potentialy damage your engine if not done correctly and the pics are of what I did to mine so please don't blame me if it all goes tits up, thanks
looking from the drivers side wing you will see the top of the pump like this
Under the cap in the middle of the cover is the smoke screw, this will affect low boost and is a must for all autos. Lever the cap out then mark the torx bolt in the middle of the locknut to the pump body, loosen the locknut so the bolt will turn free and turn the torx bolt in 1 1/2 to 2 turns clockwise then tighten the locknut. Try it up the road to see if it smokes too much, if it does back it off until it stops smoking.
Once that's done remove the 4 screws from the top of the cover( mine had 2 screws and 2 torx that hold the throttle position sensor on)
The cover should pop up on it's own, try not to twist it side to side as you don't want to alter the position of the diaphram that's below it.
Move the cover out of the way and leave it hanging on the pipe to reveal this
you should see a little pop mark on the inner part of the diaphram mark this to the pump body so you know where to put it back to.
Pull the diaphram out and you will see it looks like this,the score mark on the taper at the end is where the fuel pin rides on,if there is two marks it has been adjusted before
then if you look in the pump where you took the diaphram out you will see a spring,plastic collar and the star wheel like so
take the spring and collar out and for fcuks sake don't loose them!*
Mark the star wheel to the body so you know the original position and turn it clockwise 1/4 of a turn at a time(you'll have to build it all back up and try it up the road) if it dose'nt smoke turn it another 1/4 of a turn.
I turned mine one full turn (360 degrees) any more and it started to smoke too much. To turn the star wheel put a screwdriver between the star wheel and the pump body and gently flick it round.
The star wheel adjusts the automatic fuel control
Now you need to take the cover off again and turn up the full load fuel delivery by adjusting the diaphram. It needs to be turned clockwise between 90 and 120 degrees,start at 90 and see how it is if it dosn't smoke too much go some more.
I moved mine from this position
to this
and that's it,easy!
you could do all these adjustments at once but if it smokes badly you won't know which to back off
It's still too early to tell but if anything I'm getting better mpg although because I've loads more power now I've got my foot down more! So when the noveltys worn off I'll be able to work it out better
If you look at the links I put in post 4 it explains it all in detail and will give you a better understanding of what to do
"Happy tweeking!"
Excellant post very detailed
