[redandgreen]

Adjusted the fuel on an 02 2388 today. I used a 10mm wrench to loosen a nut then turned the screw in 1 turn. Was this the right screw ? There was also a larger nut with screw in there ---maybe 5/8 nut. I wasn't sure which one that I should have adjusted. Adjustment didn't seem to help much with the power. No load engine speed is 2500 rpm. Is there any way to check the boost ? Thanks for any help.

 

[combinekid]

Sounds like you adjusted the right screw. You should have loosened a 10mm nut and used a flat blade screwdriver to turn the screw clockwise. The larger screw you are probably talking about is what I call the torque screw. It doesn't really affect horse power output much, but adds low end power or how long the engine will 'hang on' before it stalls out. It has been a little while since I have done one so I can't remember the exact size allen key you need, but you don't need to touch the nut, just turn the allen head screw in at least one half turn. You can tap into the intake any where possible with a boost gauge. The 2388 combine has a wastgate actuator that will limit the amount of boost developed. If the wastgate is faulty, the turbo may not be making enough boost. The easy way to tell is to pinch off the small hose running from the intake to the wastgate. If your power or boost increases, the wastgate actuator is bad. Hope this helps.

 

[matt]

If you turned that screw 1 round that's plenty,you can disconnect the line to the pump from the intake manifold an suck on it if it looses vacume your pump blader would be bad I did all this an still had to pull pump bring it in an teck went tru it it made a world of difference

 

[bussard]

when i did my 05 2388, i turned the pump screw in two turns, then disconected the wastegate completly and blocked if off, stock boost is around 20lbs, then after i would hit 25lbs, and spike to 30 when pulling down, it made a world of difference to the 2388, but be aware it is harder on belts and clutches, i was able to drive a stock 2388 the same day as mine and i could not beleive the difference, ran it two years till i sold it with no problems