Truck will not stay running - stall at idle?

Truck was running strong then developed a shake at idle until it stalls. Replaced the wires and plugs but no difference. Seems like a vacuum or something. I don't know these motors well but I'm open to suggestions is there an idler control?

I cleaned up the Mass Airflow Sensor and replaced the IACV and it fixed the problem for a little while. Then it came back "very rough idling." If I tap on the IACV it idles smoothly, Is it possible that I bought a bad IACV?

Engine starts normally then dies. Unplug newly installed MAF and engine runs fine. Fuel pressure is approx 52psi from newly installed fuel pump.

I just had the engine replaced and the mechanic told me that since the computer had been unhooked for almost 2 weeks that the computer had been completely erased of history and that it would take about 30 miles of driving for it to relearn fuel mixtures, idle settings, driving patterns etc. Well, I have logged about 60 miles and it still won't idle. If you take your foot off the gas the rpms drop right down to below 300 and it stalls. The only way I have been able to drive it and keep it running when I slow down or stop is to left foot brake and keep the rpms between 600 and 1000. Do I just keep driving it because the computer needs more time, is there another way of resetting it, or should I take it back to the mechanic because it's a different problem?

I took it back to the mechanic who said he knew what it had to be if the computer didn't reset by then. He pulled the idle air control valve and cleaned it up, put it back on. When that didn't fix it he tested it by plugging his machine into the computer which told him that it wasn't working. I went out and bought another one and slapped it on in about two minutes and fired it up and it's running great. Just a note on for anyone who reads this and is interested. A few days after that was fixed I stopped somewhere with my truck and when I went to start it I got that click with no vroom and realized that my starter was deciding to go bad. I found something to tap on it with crawled under and tapped and it started. I just figured another one of those coinsidentals. I didn't have time till the weekend to work on it so when it started great and when it didn't, tap tap. When I called the auto parts place to see if they had one in stock and to confirm that the starter could draw down the battery which I noticed was happening as I was driving it Sat. Morning, he said make sure you check the connections as a Ford system has to have everything right to work properly. Also, he said if the battery is run down the alternator no longer charges it back up and to get it charged up first or it would ruin the alternator. End of story, loose wire, battery charged and everything working well. He saved me $133 on the starter and probably an alternator as well.

99 ford ranger with fuel injection, when starting the engine it will go to idle speed and then die out or run very rough at a low rpm. If you try to push the accel. Pedal it dies as if no fuel. After about 5 or 10 attempts, if it does start and keep running, all seems OK.? Can drive around town with no apparent problems. The truck has had plugs and wires replaced a few months back. When this problem started last week I changed the fuel filter, checked and cleaned the EGR valve and the idle air control, and then checked the fuel pressure at the fuel bar, when turning the key to on= psi 55, when running= 62. After a few bad experiences at auto repair garages, I try to do all of my own repairs but this one has me stumped. Appreciate the help, Mark

After a 150 mile trip I shut my truck off. When I restarted it, it will turn over but won't hold an idle unless I keep my foot on the gas. I tried it again an hour later and I am seeing the same results. What could be the cause of this. Thank you

Engine dies when started cold, will not idel, this problem started once in a while, but turn key off seemed to fix it now truck will not idel when cold but is ok warmed up

I have a 1994 ford ranger. When I start it and instantly put it in drive it runs fine. But if I let it sit in park for a few minutes it doesnt want to idle and just shut off. I just replaced fuel filter and hepled a little bit

Engine starts, idles rough then shuts off. After a few tries or, if you rev the engine a little, it begins to idle normally. This usually occurs at first start up. Sometimes it starts and idles normally. After that, it idles and drive normally. No codes are showing KOEO and KOER. Cleaned MAP sensor and checked all connections EGR, TPS, IAC sensors.

Suspect the PCM module. Do not have an engine analyzer tool.

Hi Ken,

Checked for vacuum leaks. None found. Air intake duct is new. Blocked EGR off, no change. Blocked ISC, no change in starting. On first start up when cold, engine starts, then idles roughly and dies. If you hold a part throttle at start and let the engine rev for a few seconds, it then idles normally. After that, it run, starts and drives the rest of the day. Seems to me, a vacuum problem would be present all the time? Can this be a computer problem? Could it just need some new plugs and wires? Don't know when it was tuned since I have only had for a few months. On my ALLDATA site, there is mentioned a recall for the stick shift vehicles with this problem. Still scratching my head.
Thanks, Stretch