Engine stalls

So today, I went to get the code read, and the only thing that it said is that the truck was running lean. My mecanic said that I might one of the sensors but he can't know for sure because the truck was running well.

Fuel pump, spark plugs and wires, cap, rotor, inition module(round thing with a plug and wire inside the distributor) ASD relay, fuel pump relay, hooked to computer with a slight misfire on #2 cylinder is all. All the above is new. The truck sputters and dies at anytime, driving or idling, it cranks back up right off most times, sometimes not. It takes a few tries and a few minutes other times. After replacing the above parts and $800 USD's later.I have the same problem. Is there something else I can replace that I've missed?

(1)I found one port open at the manifold. Now plugged.
Still dies arbitrarly at high or idle speeds. Plugging the port seems to create more of the problem. It does seem to start back up quicker though.
(2)I unplugged the idle air motor while running. Rev'd it up around 2500 rpms. The engine was surging but still continued to run. Then at idle had a harder time but did not die.
(Comment)but get this, the security system started acting up a few months back. The engine would not start if the security system was at fault. You won't believe this but I just started the truck up after testing the idle motor (unplugging then replugging while running), I then locked the doors and took it for a spin.I do mean spin. No rough running, no valve clatter, good accelaration. Will it continue to do so. At every test, I check the fuel pressure first thing. Always had a squirt the valve but now I here the pump with a definite run and presure build up.
Still no definiitive conclusion as to where the real problem is yet. Is there an inline fuel filter or security shutoff that can either be by-passed or disabled? This is as close as I can guess on capturing this ghost. Probably a dead inlaw.

Truck did great to the store. Not so good after. Would not start after coming out of the store. Sat there and waited, tried, nothing. Got out of the truck and turned the key to unlock then lock then unlocked. Got back in. Truck started and ran fine up to around 30 mph, sputtered and slowed, then picked back up and ran fine.I pulled into a local shop that has a good rep. Talked to the owner who said they had a similar problem with a dodge truck a few weeks earlier that turned out to be a loose wire at the door key switch causing the security system to do a complete shutdown just as I have talked about. He also recommended that I replace the fuel pressure regulator.I think I'll take it to him in a few days and see if they can find a problem in the wiring. Thanks for the help. If anything definitive is discovered, I'll let u know so u can put it down for future reference.

We have replaced fuel filter and pump, pick up magnet, distributor cap and rotor, ignition coil, the diagnostic tool points toward the ignition coil circut. Help. The truck runs great for a mile then it stalls out. Then sometimes it will run all day with no problem. Your help will be greatly appreciated.
Mike

He said that another problem a customer had had earlier was at the regulator.I suggested that I could change it to try and cover all the bases. The pressure has always been good though.I will change it and drive for a test.I doubt that that is a problem though. If it still dies, I will then examine the wiring harness and door wiring. If there is nothing obvious, I might take the rail off and add a 2b carb. Get rid of all the junk.I will get it reliable.

I'm possibly dealing with more than one problem. I've unplugged the IAC. The engine does not die now at all unless I let off of the gas petal while idling. So I'll replace the IAC, then try it and then look at the pressure reg. The truck will not shift into high gear while the IAC is unplugged, don't know why that is but ok.I had a ford EXP in the '80's.A loose ground wire located under the front right headlight. This caused the engine to die, the wipers to run without being switched. The radio to play etc. All from a loose wire. Drove me crazy till a buddy saw a blue arc under the headlight when I dropped him off one evening. We tightened it up and no more problems. If this is an intermittent problem, it may never be resolved without major money. I bought an 02 jeep in 01 new. Within 3K miles I had an intermittent problem with the engine dieing. Turned out to be a wire in part of the harness that was rubing on the transmission. Another head scratcher. Mechanic kept it for 2 wks to find it.I will continue with your advice till we have definitively found the problem. It's personal now.

Random stalling, dies out and sometimes hard to restart.

I was pulling up to my drive way wen my truck just died like you turned the key off I've had the PCM replaced the distributor cap and rotor new plugs wires checked the fuel pressure it just turns over and will not run and its not popping codes

I have a 98 dakota and for the past 2 months I have been dealing with this problem. The truck will die and act as if it is flooded when I try to restart. After 1 or 2 minutes it starts. There is no engine light. It happens at idle and while driving. About 1 month ago I thought it was bad gas since my wife's buick was having similar problems. I used octane booster in both cars and problem went away for a month. We also started getting gas somewhere else. Now the problems are back in both cars. The dakota is having worse problems. We moved here(albuquerque) last year and the octane levels here are lower than it Texas. Can this be the problem? I have replaced air filter on dakota and I don't think it is engine related due to no check engine light. Please help. Robert