M1123 Low Power

[Maxjeep1]

I took the fuel cap off and still the same thing, the fuel filters are coming in today so I will change that and see what happens, the only reason I have doubts that its the filter is because the last time I took it out, the filter and the housing was still clean inside

Cut it open and spread the pleats apart and see what’s really going on inside it. You are going to change it anyways.

 

[Mogman]

Since you removed the fuel cap and it made no difference it is not a vent issue, I would start looking at the return system any restriction there will cause a loss in power, you might want to remove the check valve in the top of the IP (the return line fitting) and inspect it, (careful not to get any trash in that port) it has a glass ball in it so you should be able to see light through it, sometimes trash plugs up that fitting. also you can carefully blow some air from that hose back to the tank to make sure it is not plugged.
You do have an odd issue, it will be interesting to see what you eventually find.
Others can comment on the effects of a plugged CAT other than loss of power, I would think there would be considerable smoke as the excessive back pressure should cause incomplete combustion as the cylinders would not be able to scavenge fresh air.

 

[Hummer Guy]

Cut it open and spread the pleats apart and see what’s really going on inside it. You are going to change it anyways.

Yep, I took it apart, I didn't see any crazy kind of sludge or dirt in it. I drove the truck for about an hour and its doing perfect so far, I'll take it out again tomorrow and see how it does.

 

[Maxjeep1]

I have 1 of my trucks that’s a problem child and it develops issues while just sitting. I come out the other day and I have a coolant leak just about where the heater core is. I have fixed several fluid leaks and they seem to return. I think it is possessed and needs a minor exercism. I guess it’s to be expected from old military trucks.

 

[Hummer Guy]

I have 1 of my trucks that’s a problem child and it develops issues while just sitting. I come out the other day and I have a coolant leak just about where the heater core is. I have fixed several fluid leaks and they seem to return. I think it is possessed and needs a minor exercism. I guess it’s to be expected from old military trucks.

I have a BRDM 2 that's exactly like this, random issues comes out of no where from sitting up and then there's so many leaks that I don't know where to start again on it lol

 

[Maxjeep1]

I have a BRDM 2 that's exactly like this, random issues comes out of no where from sitting up and then there's so many leaks that I don't know where to start again on it lol

I’m capable of eventually sorting through my truck but I’m at the point where I want to ship it to Retiredwarhorses and have him make it a driver. I don’t know if I can afford it but it makes the most sense.

 

[Hummer Guy]

I’m capable of eventually sorting through my truck but I’m at the point where I want to ship it to Retiredwarhorses and have him make it a driver. I don’t know if I can afford it but it makes the most sense.

I hear you on that, at least you know you'll have a reliable truck in that case too lol

 

[Hummer Guy]

Drove it today, so far it's still doing good, I'll update you guys again if it dies down or in a few days if it still has its full power

 

[CapePrep]

These trucks are very basic. A good diesel mechanic could help you. But, basic engine diagnostics still apply. Compression, fuel pressure and volume, oil pressure, etc.. Steve would definitely make it right. But you need to diagnose one thing at a time and than go from there.

 

[Hummer Guy]

Seems like everything is good so far, I put the truck to work this morning