i have done both per these instructions:
"Transfer pump: This increases case pressure. Looking at intake of pump inside inlet fitting, there's a 5/32 allen screw, turn clockwise looking at it, increasing case pressure and timing advance across board. Be careful, too much and it will blow seals out of shaft and pump fuel into engine.
Benefit is slightly improved throttle response and better fuel atomization.
One half turn will increase upper rpm and lower rpm housing pressure, timing will advance slightly."
and fuel increase procedure:
Increase Fuel
Take off small cover on drivers side of IP. It's very small and has 2 screws holding it on. Will need to remove throttle cable and bracket to see cover. Once cover is off, a little bit of fuel will spill into engine valley. Look for a small 5/16th Allen screw under cover that appears through small access hole. Screw rotates with engine so will need to have a large breaker bar on crank pulley nut to rotate engine while looking for screw to appear in access hole. A small flashlight and mirror helps to see this screw. It helps to have someone turn crank while watching for screw, but can do alone, but takes longer. It helps to remove throttle cable bracket and detach cable from IP. May also have to move linkage to get to access cover and fuel screw.
Once screw's in sight use 5/16th allen wrench to turn it. To increase fueling, turn clockwise. It helps to turn in small increments. Turning 1/6th of a turn ( imagine 12 O'clock to 2 O'clock) gave a good fuel rate to match increased airflow from K+N and Kascar resonator pipe. Could have gone 1/4 turn clockwise, but wanted to be conservative. It is important to increase airflow along with extra fuel or will just put out black smoke without extra power. Once screw has been turned put back together.
http://www.flashoffroad.com/Diesel/injectionpump/mechanicalpump.htm
question is: will this cause noise to come from the IP?
i've replaced all injectors with known good ones and the noise is still there. not as bad but i still hear it. don't want to cause damage. should i decrease Case Pressure just to be on the safe side?
"Transfer pump: This increases case pressure. Looking at intake of pump inside inlet fitting, there's a 5/32 allen screw, turn clockwise looking at it, increasing case pressure and timing advance across board. Be careful, too much and it will blow seals out of shaft and pump fuel into engine.
Benefit is slightly improved throttle response and better fuel atomization.
One half turn will increase upper rpm and lower rpm housing pressure, timing will advance slightly."
and fuel increase procedure:
Increase Fuel
Take off small cover on drivers side of IP. It's very small and has 2 screws holding it on. Will need to remove throttle cable and bracket to see cover. Once cover is off, a little bit of fuel will spill into engine valley. Look for a small 5/16th Allen screw under cover that appears through small access hole. Screw rotates with engine so will need to have a large breaker bar on crank pulley nut to rotate engine while looking for screw to appear in access hole. A small flashlight and mirror helps to see this screw. It helps to have someone turn crank while watching for screw, but can do alone, but takes longer. It helps to remove throttle cable bracket and detach cable from IP. May also have to move linkage to get to access cover and fuel screw.
Once screw's in sight use 5/16th allen wrench to turn it. To increase fueling, turn clockwise. It helps to turn in small increments. Turning 1/6th of a turn ( imagine 12 O'clock to 2 O'clock) gave a good fuel rate to match increased airflow from K+N and Kascar resonator pipe. Could have gone 1/4 turn clockwise, but wanted to be conservative. It is important to increase airflow along with extra fuel or will just put out black smoke without extra power. Once screw has been turned put back together.
http://www.flashoffroad.com/Diesel/injectionpump/mechanicalpump.htm
question is: will this cause noise to come from the IP?
i've replaced all injectors with known good ones and the noise is still there. not as bad but i still hear it. don't want to cause damage. should i decrease Case Pressure just to be on the safe side?
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