Ok guys... Ive been trying to find time to clean my map and iat for a while now and finally took the time this morning. I pulled em both out and they were both clean as a whistle.... and the truck has 92+k on it.... sound normal? I check the resistance on the iat while i had it out and it checked out fine. I figured mine would be completely covered in soot the way i drive and having not cleaned them before. -

HotRodCrewCab's Sig:

2001 Dodge 3500 Dually - Cummins 5speed, 5" Strt Exh, K&N Intake, Fass 150, Quadzilla Adrenaline w/ Pulse

Every truck is different. If your not makin a lot a smoke out the exhaust it also helps the sensors stay clean. Exhaust brakes also kill em quick and i don't see one a those in your signature so all this means is that you have a good runnin truck. They tend to throw codes when they are bad. -

Uncle Bubba's Sig:

99 Quad Cab, 4wd, Drag Comp W/Pump Wire & Boost Elbow installed, K&N Air Canon, MBRP exhaust, Belt Drive Lift Pump and bottom Bulkhead feed from the tank, Isspro EV Pyrometer, Boost Gauge, Fuel Pressure Gauge, DT Pro Fab Trac Bar, South Bend 13-1.25 Con O Clutch, Ranch Hand Bumper, Borgeson Steering Shaft, Black Silicone Boots, 2" Lift Soft Ride Front Coils, Solenoid High Idle Kit, Bilstein 5100 HD Shocks, Rickson 19.5 Wheels w/Hancoock Rubber, HD Maxx Link Sway Bar Links, Superlift dual front stabilizer, EGR Brakes Front and Back, RV275 Injector's, Blue Chip VP44, Prodigy brake controller, B&W Gooseneck hitch and more I can't remember right now. Not to mention more to come I'm sure.
374.2/846.7 at 30psi

they really get bad if you run an exhaust brake...........every 10k for me -

Whit's Sig:

* 01 Cummins/Dodge/HO/6 speed*275 injectors*PDR 35 turbo w/14cm housing & high pressure boots*HTT 3 piece ported exhaust manifold*Progaurd 7 with prefilter*Edge Comp*Fass II*Southbend con OFE*Jacobs brake*5"Stacks Big ens*E/F shift knob w/2low & brake switch*10 Gages*KW Ram air System cab controlled*Rickson 19.5x265's*True speed calibrator*Rancho 9000's*DT track bar*DSS steering stabilizer*KW Side impact rails*KW Traction Bars*Toolbox/fueltank 60 gal Combo*Mag High Tech Diff Cover*Ranchand bumpers*Grover air horns*Rear Wheel Cylinder Upgrade DYNO 375 Horse 941 Torque

Always remember...when life hands you Lemons,ask for Tequila and Salt and call me over!

well i do produce plenty of smoke I was actually hoping they were really dirty and would explain the kinda not so good fuel mileage -

Not so good a fuel mileage is gonna turn out to be the APPS sensor. There's a good article on here about how to check and adjust it if needed. It's helped a good many of us.

Adjusted APPS, I Was Bored -

nah... did that a couple weeks ago ... looks like im gonna have to get a pair of lighter boots -

No codes, no changes in smoke patterns, air and fuel filter flowin good, no brakes hangin up, fuel pressure holdin steady, these are the quick things i can think of. I'm havin the same issue right now myself. It may also just be the fact that the fuel may have already been changed over to winter blend where your at or they may be adding a higher concentrate of Bio to it. Both these things also decrease fuel mileage. -

Im pretty sure we have switched to winter fuel in northeast ohio. Just did all the filters and the brakes are fine. -

Winter fuel always puts the bite to fuel mileage. I lose at least 2mpg myself every winter and if I'm pullin heavy more then that. I'm all for bio fuel as an option but it kills fuel mileage and power so when they blend it I would expect a price drop to reflect that blend but I've never seen it yet. Over here every diesel pump has a green tag on it that says that this fuel is a bio blend of between 2-20% so you never really know what your gettin anymore. -

I dont think we are getting bio-blended fuel over here... not entirely sure though, it does make the smoke more of a gray than black, I do know that. I actually have a biodiesel processor and run it whenever i can find enough oil. I got better fuel mileage on 50/50 though. -