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I just had an issue with the distributor. You can read my thread in the same topic. I was getting a start, but then die like a fuel cut issue. The distributors on these trucks seem to be pretty finicky. I could definitely see it being a cam sensor or ignition coil issue, which requires that the...

Update and potential resolution: I replaced the distributor with an OEM remanufactured distributor and that seems to have done the trick. I'm kicking myself that I didn't try it earlier, but a $300 part that might not work is a pricey gamble. Anyway, barring something unexpected, I'm guessing...

No go on the ECM. Tried a junkyard unit, and I had the exact same issue. I REALLY doubt two ECMs would have this same issue with no codes, and with no one else on the forums having this same problem at some point. It's just too unlikely for me to still suspect the ECM. This takes it to an...

So the mystery deepens.... My buddy and I were going over a few of the signals with his oscilloscope. We were taking a capture of the cam position reference and position signals, both of which seemed mostly fine. I decided we might as well make sure the injector pulses were looking correct, so...

Sooo, still no headway. Think I might start back probing the ECM harness to check the injectors and everything else a little more in-depth. It really seems like the truck is dying when it should be switching from open-loop start-up conditions to close-loop running conditions. This makes me...

To my knowledge there's nothing like that on my truck. Also definitely nothing in the FSM wiring diagrams.

Just a quick sanity check: Can others confirm that the security system ONLY disables the starter and does nothing to affect the fuel or spark? Looking through the wiring diagram the anti-theft system only seems to be connected to the starting circuit, but digging through stuff online some people...

Yep, Start gives i1, B, R, and ST. Cuts AC and i2. I can double check to make sure. If there wasn't continuity between B and R in start, though, I wouldn't expect that the starter would turn over? I can't find a good section that shows what the ECM does with the start signal. I'll double check...

Just kidding, I found it throughout all of the power distribution diagrams. So it's looking like the only thing that ST and R control are power to the starter and the "Start" signal to the ECM. I guess if you have a Canadian X it also controls your daytime running lights, but that's not relevant...

Alright, everything checks out except one thing: There is no continuity between ST and R when the ignition cylinder is not in the "Start" position. What is "R" used for, and could it potentially cause the stall if ST and R have no continuity after the cylinder returns to "On"? I'm getting my...

Muadeeb, did you have a chance to dig up the voltages I should be looking for? I was digging through the FSM. Looks like the ignition switch has 6 leads (connector M48): i1, i2, ST, AC, R, and B. I can only find anything for i1, AC, and ST. ST sends the start signal to the starter and i1 sends...

So I'm pretty sure it's not the security system. I replaced the security relay and a few other relays under the dash. Still no dice. Security system seems to do everything it's supposed to. I replaced the ignition relay and fuel pump relay is good. No codes stored or pending. Just to check I...

So no other suggestions? Truck is about to be donated to Salvation Army. It's now clicking under the dash when I go to start it. It still starts and idles for a very short period of time, but then just dies out. Could this be the anti-theft system engaging after start-up? This is really starting...

Out of curiosity and just to try something (hopefully) simple: Does anyone know how to just straight up disable the security lock-out feature? Can I just pull a fuse and it can't affect anything? Or does the ECM require a signal from the security system to allow the engine to start/run?

Cats being plugged is certainly a possibility, but I feel like the symptoms would manifest a bit differently. The fact that it still starts and sounds like it's going to run strong before just dying doesn't make sense to me if it was something like clogged cats. I've just never heard of a...

Yeah, intake hose and MAF are both new. Tried unplugging the MAF and it still just dies, so definitely not a MAF issue. I really wish that was all it was....

Whole distributor is new, but the cap and rotor are definitely lower quality than what I had on there. In fact, the rotor and the plug contacts have slight charring on them already, which makes me doubt it's quality even more. I know about the R50's, had a '97 before I picked up the X cause I...

Thanks, Bushnut. I read about how horrible the aftermarket distributors for these trucks can be and how particular this engine seems to be about its distributor, which is why I keep zeroing in on it. I'll clean up and recheck my battery and engine grounds and do another sanity check on the...

So to start there's a little bit of backstory to cover: Had my '02 X for about 2 years, and took it out into the desert plenty of times on 120+ degree days where it ran for 10 hours straight no problem. Moved just this past summer about 1500 miles, during the drive about 800 miles in, the truck...