I have an '84 international road tractor with an L-10 and was just wanting to turn it up a little, just enough to blow a little smoke :). Could anyone tell me if this is a very hard job and how to do it?

Very easy to do. Remove the throttle linkage from the throttle shaft. Around the throttle shaft will be a sheet metal cover. Remove the rivets holding it in place. After that is removed you will see above the throttle shaft a an allen set screw with a hex head 7/16 nut locking it into place. Loosen the nut and back off the set screw 3 turns. That is you AFC adjustment. Now in the center of the throttle shaft which is hollow and should have a lead ball driven into the center of it to hender tampering. This ball might not be in place, if not skip the next step. Using a small drill bit, drill out the lead tamper proof ball. Now using a small long shank flat blade screw driver, slide it into the thottle shaft and turn the fuel screw out a couple of turns. You can continue to make adjustments until the results are what you are looking for. But don't get greedy. The engine will get injector rattle after this but it is normal. There are other ways of increasing fuel further but internal pump dissassembly is required. Now for the bad part. Increasing fuel flow is increasing fuel pressure, which in turn is a harder on the camshafts due the the increased effort required to push the injector plunger down. An increase of 100psi in fuel pressure decreases camshaft life by 50%. Now that being said, there are tons of trucks that have had fuel pressure increased and have had 0 problems. Take it for whats it's worth. It's like anything else, risk of gains, pay to play.

This truck is one of those old "overnite trucking company" trucks. I think the odometer is showing 600 and some thousand but doesnt work. It probably has a million or more on it. It hasn't used any oil since I've had it. It white smokes when sitting and idling and i dont know what thats all about. The only thing I do with it is pull a 20-ton trailer with a cat d-5 high track dozer(prolly 26-27k pounds)on it around here local from farm to farm. Maybe i should just leave it alone. Im just wantin a little smoke and i might end up paying for it.

I have an '88 L 10 will the same rules still apply as they do to the '84?and also what about clutch life after crank up?

Turning it up for getting some smoke is not the top reason i would do it for i can make any diesel smoke just gots to work it harder. Give it a tune up you my get that result and a better running truck all around. But its up to you as to what you really want any how so just keep in mind what might happen if you push the fuel to it. My smoking truck is a formula 350 cummins with twin HX82s on it

Put a lower number button in it. It will raise the pressure.

Yep. Then there's always the button. But for alittle to moderate power increase adjusting the main fuel screw is easier and cheaper. But then again we used to sell the hell out of low number buttons, and marine injectors. But by far the cheapest mod is the vise grips on the return line to raise fuel pressure.

Yep. Then there's always the button. But for alittle to moderate power increase adjusting the main fuel screw is easier and cheaper. But then again we used to sell the hell out of low number buttons, and marine injectors. But by far the cheapest mod is the vise grips on the return line to raise fuel pressure.

Oh no, another Juice grip application, haha.:D

Oh no, another Juice grip application, haha.:D


What to you mean another? Hell that was the orginal application, blocking off wastegates with them came along years later. :D