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Will a Ficm out of a 2004 work in a 2003? Truck won't start, ficm had 48v with key on, while cranking it went down to 17.6, put different ficm in, still won't start. Didn't check voltage yet.

2004, 6.0 Ran fine, parked it, next morning wouldn't start. It cranked fine and sounded like it was hitting on a few cylinders but wouldn't start. I plugged it in, it did the same thing but started this time. Runs rough when cold, once hot it doesn't run just bad. When you shut it off hot and...

Early 99 running rough code P1316 Did buzz test, said low to high side open on 2,4,6 injectors changed UVCH with known good one, no change. Are those three injectors bad?

Gauge worked fine yesterday, today if you turn key off with engine off guage reads 300. Any idea whats going on, all connections seem fine. Wiggle wires nothing changes.

The original O ring on my LPOP was a square cut black one. The one I ordered online showed up, and its orange in color and doesn't seem to be the same thickness. Part number XC3Z-6619-AA is what I got. From what I found, it is the correct part number. Anyone know anything about the two...

Just like the title says, I need an early 99 intake spdyer

I know this is aftermarket performance section and not all of this is performance stuff, hope its ok to post here. Turbo has a 76mm compressor, A/R 1.16, t4 flange, its basically an s-300 with 19cm housing. I put roughly 10-12k miles on it. Uppipes and pedestal are available also. I paid...

I have a 76mm s300 turbo and ran 238/200 injectors, spooled great. After a few small reliable issues I want to go with a little smaller injectors. I need a reliable truck now, not a race truck. I really like this turbo, I don't want to get rid of it. If I put in some 200/30 injectors would...

For sale is an AFE Big Boost filter $55 shipped obo And a filter cover for a 6637 filter $25 shipped obo

I've been reading about this filter and it seems to be a good one. Will this filter flow enough air for 550-600 hp? What about a filter cover? some say to put one on to extend the life of the filter and some say not to put it on.

When I run the test, cylinder 2 and 8 fail. When in P or N the the truck shakes as you slowly take the rpms up to 2k or so then its fine. But when your going down the road no matter what rpm the truck is smooth as glass. Should I not worry about it?

I just took the filter off to clean it, looked inside the intake tube and it looked like there was dust in the tube. I rubbed my finger against the walls of the tube, and sure enough my finger had dust on it. I thought this filter filtered good? It was a new filter, this is the first time...

I may have a complete truck to part out, nothing is missing. Its a 1997 reg cab, 4x4, auto, 7.3 of course, with only 66k miles. The reason for part out is, the body is real bad. I may part it out, or fix it, I don't know yet. I'm just seeing if there is any interest in any parts. If you want...

This exhaust back pressure sensor, does it need to be plugged in or not? I've heard you can unplug it and cap the tube at the manifold, and it won't affect anything. And I've heard others swear doing that will hurt your fuel millage.

My stock hubs are froze in the locked position, thinking of getting the warn premium hubs. My fuel millage has been down a little since the hubs locked in and won't unlock. With the hubs locked in, would this cause a noticeable drop in fuel millage?

Truck will turn over but not start, theses are the codes codes P0284 P0611

Its the SCT Livewire 9600 with egt monitor kit, like new. $450

Since I seem to have a dana 50 up front, Since Detroit doesn't make a trutrac for a dana 50, whats the next best option?

Sometimes it will start right up, sometimes you have to cycle the key once or twice. When is won't start, it will just crank and crank, no smoke, icp goes up to 2500. Then if you cycle the key, it will start up like nothing happened, then others times you have to cycle the key again. It did this...

I searched but didn't find a thread on aftermarket bumpers. I'm looking to make my own, and looking for design ideas. Post up some pics! Thanks