1151 Power Loss

[BKubu]

Could this also be why these trucks blow soot out of the fording exhaust?

In my experience, this is caused by moisture entering into the exhaust and shooting out upon start up. I don't believe this is caused by anything discussed here. It happens on trucks without a catalytic converter, too.

 

[jake20]

So uh I guess while still on this topic, any thoughts about just welding a pipe in place of the cat? Given that a new one is $1400-$1800

 

[Coug]

So uh I guess while still on this topic, any thoughts about just welding a pipe in place of the cat? Given that a new one is $1400-$1800

Not sure if we're allowed to agree with something like that on a public forum as it's technically advocating illegally modifying a vehicle to defeat emissions equipment, which the EPA kind of frowns upon.

 

[jake20]

Not sure if we're allowed to agree with something like that on a public forum as it's technically advocating illegally modifying a vehicle to defeat emissions equipment, which the EPA kind of frowns upon.

Yep understood, lots of money for a tube though lol

Kind of weird thinking about it however, I can't imagine our guys having issues getting out of dodge while in combat because a cat got plugged up, but that's my

 

[Coug]

Yep understood, lots of money for a tube though lol

Kind of weird thinking about it however, I can't imagine our guys having issues getting out of dodge while in combat because a cat got plugged up, but that's my

From what I've seen in the past, cats tend to get plugged up from excessive idling, so not really a worry with trucks that are actually getting used hard on a regular basis.

I will say that unlike civilian vehicles, the HMMWV doesn't have any electronics that register the presence of a catalytic converter, so there is nothing that actually cares whether it is there or not other than the EPA

 

[jake20]

From what I've seen in the past, cats tend to get plugged up from excessive idling, so not really a worry with trucks that are actually getting used hard on a regular basis.

I will say that unlike civilian vehicles, the HMMWV doesn't have any electronics that register the presence of a catalytic converter, so there is nothing that actually cares whether it is there or not other than the EPA

Yea I was wondering more in terms of exhaust system back pressure in the long run. Other than that I don't really think there's a way to clean the old cat out.

 

[HoveringHMMWV]

Found this video regarding cleaning of a DPF.

Not sure if it would fully relate to a catalytic converter. Long video but very thorough. He ends us using both drain cleaner and a diluted brick cleaning acid. I would love to hear of any other successful methods.

 

[87cr250r]

Don't mix those two things. The sodium hydroxide in drain cleaner degreases everything. It's then rinsed and then dipped phosphoric or sulfamic acid to remove oxides. If there is any oil on the surface at all, the acid won't make contact and won't clean.

You could also consider putting it in an oven at 500°F + or throw it in a raging camp fire for a bit to degrease. Sodium hydroxide is really nasty stuff.

 

[jake20]

Hrm it seems like the way they bolt the muffler is not intended to be removed unless the body is off. The hanger for it is in a spot you can’t really fit your hand. I’ve removed the cat with relative ease so I suppose I don’t need to pull the muffler though. Just wondering if anyone’s removed the muffler in any special way

 

[jake20]

I suppose you could remove the rear end of the driveshaft from the diff but that’s the only other way I see.