how about the cats?

 

^^^^^^^^^ i was just about to suggest that, wow all these v10's pop in just as i leave, figures, but one thing also to check is the #5 and #7 wires are separated, i know the harness that goes acrossed the front of the engine practially puts all of them together but make sure you have them spaced away from each other they have a tendency to communicate and you don't want that, that will give you a wandering idle, mine did that. one other thing, contact hemifever@aol.com and tell him you have a v10 and you want a tuner, not sure what he's charging but should be around $275, even though yours are stock, you will not believe the difference in power, not to mention you improve your gas mileage trust me i know, i used my v10 to haul travel trailers all over, once you get over the difference the tuner makes, i suggest you use the 87 tune with 89 octane or 93 don't use the 89 tune or 93 tune unless you just like spilling your drinks or snappin your neck, but i was getting 14.8mpg with a 4000lb trailer 87 tune, 89 octane, and if you haven't done soo yet, change your thermostat to a 180, my truck had dual exhaust, 2 cats, 1 muffler that had the "X" in it, magnaflow cats hi flow, dynamax muffler, she was quiet with a little rumble, but once you smashed the gas pedal and got it around 2500 rpm's sounded like a honda civic, funny how people are looking for a honda and instead see a big a$$ truck screamin down the road.

 

I am having the same problem... mine is 2002, 30k, CATS appear to be bad... whats a good replacement for the V10

 

take them off

 

I am having similar issues, I'll just make sure when you buy a Cadillac converters they have the Air booster pipe, or they will fail again in a few years I know from experience
any way to change fuel pump , iac motor , tablets in the radiator, in case fluid was hitting plugs, new alternator, going for plugs wires n coils this week even though machines say nothing is wrong , 4 different shops.

 

What codes, if any, is it throwing?

 

WTF is an AC motor for tablets in the radiator?

Whatever it is, I think I want one. It'd be neat to pop open the hood at a meet, take off the radiator cap, and find a bunch of Quaaludes in there. Unless Date Rape Cosby were around, anyway. That SOB would be as hard to get rid of as drug resistant pubic lice if there were fresh new 'ludes to be had.

 

I use AC tablets in my oil all of the time, it helps lube the muffler bearing. I will have to try it in my radiator too. Maybe it also prevent me from running out of blinker fluid.

 

I do not get any codes, i have noticed that if i put it in park and let it idle for a minute it seems to smooth out, also if the ac is on it looses power but does not missfire.
it just randomly miss fires sometimes for a minute sometimes for a half hour

 

What year is your truck? What engine/trans? What have you done so far to try and figger out what's going on?