1992 7.3l idi none turbo, no power
#1
1992 7.3l idi none turbo, no power
1992 7.3l idi none turbo crew cab long box 4.10 gears 5 speed manual.
I have been pulling a 20 foot car trailor with three atv's on it for a while now, but the last two runs i made with it i noticed a major loss in power. With just a slight incline i am not able to hold 60 mph. Even if i down shift to 4th gear i still loose speed. I also noticed that a run that normaly used less than a half a tank of fuel now uses almost a full tank. I changed the fuel filter and it did not make any differance. I checked the fuel pressure and came up with 4 psi. I was told that 4 psi is in spec but on the low side.(still has a manual fuel pump) The only other place i can think to look is the injection pump, but i have no idea how to test it. I was told this engine was rebuilt before i bought the truck about 60,000 miles ago. The loss of power happened over one weeks time.
This truck should be able to pull more than that, correct?
How can i test the injection pump?
Any other ideas would be helpfull.
I have been pulling a 20 foot car trailor with three atv's on it for a while now, but the last two runs i made with it i noticed a major loss in power. With just a slight incline i am not able to hold 60 mph. Even if i down shift to 4th gear i still loose speed. I also noticed that a run that normaly used less than a half a tank of fuel now uses almost a full tank. I changed the fuel filter and it did not make any differance. I checked the fuel pressure and came up with 4 psi. I was told that 4 psi is in spec but on the low side.(still has a manual fuel pump) The only other place i can think to look is the injection pump, but i have no idea how to test it. I was told this engine was rebuilt before i bought the truck about 60,000 miles ago. The loss of power happened over one weeks time.
This truck should be able to pull more than that, correct?
How can i test the injection pump?
Any other ideas would be helpfull.
#3
#5
Check that your e brake cables are all moving free- possibility that brake drag is causing performance issues?? Does your truck smoke at idle even when warm? Check for pressure build up in your tank, or a restricted return line system, these will affect your dynamic timing, causing balck smoke and poor milage. Restriction in the exhaust?
#7
It's the tuna can shaped part bolted to the back of the intake, and clamped to a rubber coupling that connects to the valley cover/crankcase. Be carefull with the clamp and rubber coupling, they get brittle where the grommet attaches to the valley pan. (Crankcase Depression Regulator)-same as the PCV on a gasser. Good placed to start- should be cleaned every other oil change. soak in gas and slosh out until clean, do not use compressed air, check for broken diaphram, clear small vent hole on back of can, reinstall when completely dried out.
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