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SO. I have been on the quest to make my 1989 F350 7.3 smoke. I want to put in a stack, but I want to blow coal before doing that. I tried turning up my fuel pump, but I just can't get the screw inside it to turn. I'll get it lined up and get my 5/32 Allen in there but it won't budge. Gave up a couple times, so if anyone has any tips on getting that screw to move, that'd be awesome. I also heard that you can put some cardboard over your air intake with 6 holes in it and it'll smoke as if you turned up your pump. Is this bad for the engine?
Thanks guys!
SO. I have been on the quest to make my 1989 F350 7.3 smoke. I want to put in a stack, but I want to blow coal before doing that. I tried turning up my fuel pump, but I just can't get the screw inside it to turn. I'll get it lined up and get my 5/32 Allen in there but it won't budge. Gave up a couple times, so if anyone has any tips on getting that screw to move, that'd be awesome. I also heard that you can put some cardboard over your air intake with 6 holes in it and it'll smoke as if you turned up your pump. Is this bad for the engine?
Thanks guys!
Don’t restrict the air at all you want as much air as possible through the intake. That said rollin coal is a result of unburned fuel so you’ll need to get more fuel into the combustion process. You may just have too old of parts I’d put in a new fuel pump and fuel lift pump and make sure all your injectors are squared away as far as o-rings so that you don’t have air intrusion. Then there’s a few forums that’ll tell you how to get to your fuel screw but it sounds like you figured that out. I would install an egt gauge and run it to the cabin as the very first thing you do Bc it’s really easy to overheat and destroy the engine going uphill or pulling a load. But basically just upgrade your fuel delivery system! I wouldn’t recommend bigger injectors unless you plan to do an aftermarket upgrade tho the pump and install a turbo but just have fun with it man! Also it’s fun to roll coal but the stock tune on these trucks is part of the reason they last 500k miles routinely so just keep in mind you will probably negatively impact the longevity of the engine. To me it’s worth it it’s cool and it’s fun and it’s fitting for the old dirty diesels to blow a cloud on the ******* driver behind you or when ur gunnin it to the lake with the old lady and the boat XD
 
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