Give this a looking over:
http://www.dakota-truck.net/faq/Electronics/gen2_stalling.html
will wrote:
> <P>Hello,</P>
> <P>I'm a new member to your group, although I've been
> reading the archives for about three months. So I know
> that many of you have lots of hands-on troubleshooting
> experience. I searched throught the archives for some
> info on my problem. No go.</P>
> <P>So now I need your help, if possible. I had a
> "crank, no start" condition about 2 weeks ago. Truck
> was running rough and stalling in traffic. And
> pinging. Then truck died. Strong crank, no start.
> Truck was throwing 12, 14, 32, 51 codes. I paid a
> mobile mechanic (2.5hrs) to diagnose my problem with
> his $$$$ Snap-on scanner only to discover after
> replacing the crank sensor he said was bad, that it
> didn't fix my problem. Thank goodness for friends.
> With his el-cheapo DVOM, he went through a few 'basic"
> tests and discoverd the coil was bad.
>
> Replaced coil. But idle was rough on start-up with new
> coil. Then truck died. Wouldn't idle. I disconnected
> MAP sensor (got the idea here on the list), and truck
> idled fine. So I drove around for a few days with the
> MAP sensor unplugged. No problems. No codes or MIL.
> Then the truck started stalling out everywhere. And it
> got progressively worse.
>
> Bought/installed new WELLS MAP sensor from Autozone.
> Wow! My truck idled so quietly, hard to tell it's
> running. So I took out for relearn drive about 40
> miles to the city. I noticed that check engine light
> gone. Only maintenance light showing (O2 sensor?.
> Truck has 120k miles). Never made it to city. Truck
> sputtered a few times like it was running out of gas,
> then caught itself, but it didnt' last. About two
> minutes later it died. Strong crank, no start! No
> codes. No MIL. Interestingly, no gas smell even though
> i was pumping gas pedal. Too much traffic so I
> couldn't hear fuel pump whirr, if any. Towed home.
> About an hour later I thought I'd try starting the
> truck. Heard the fuel pump whir. Truck started. I had
> Autozone test their sensor. Failed test. Got a new
> one.
>
> Installed new MAP sensor. About thirty minutes later
> my truck is stalled again. It almost seems as though
> somebody pulled off the coil connector. That's how
> sudden and quiet the stall is. Then tach drops to
> zero. Although a couple of times the engine sputtered
> like it was running out of gas. And I swear i heard
> the fuel pump whir when i turned key to "on" position
> after i stalled. No battery or other lamps lighting
> except for "maintenance required" light. No codes.
>
> That's where I am now. Truck half-dead while driving.
> Brain half-baked in head. Wallet half-empty in pants.
> Your expertise and advice will be most welcome. Thank
> you.</P>
> <P>Will 92</P>
>
>
> __________________________________________________
> Do you Yahoo!?
> Yahoo! Mail Plus - Powerful. Affordable. Sign up now.
> http://mailplus.yahoo.com
This archive was generated by hypermail 2b29 : Fri Feb 06 2004 - 11:48:15 EST