[Shotimes] (UPDATE) SHO left me stranded... 50 yards from a Ford dealer

[Kevin & Cheryl Airth]

Mike:
 I have had this several times, just about the exact same symptoms. Reseat
the LPM. I have found that over time the LPM fit into the PCM does get
worse. The LPM is very light weight but is heavy enough to work on the plug
I guess? I duct tape the ribbon cable to the PCM as tightly as possible. You
can't get at it very good to secure it anyway!
.
.


> After three weeks of perfect operation, I have run into the same problem
> as from before.
>
> Here's today's situation:
> After driving 25 or so miles, the car would give a slight buck like it
> was trying to stall while traveling over bumpy stretches of road.  Then,
> at the next traffic light, the car stalled as soon as the car came to a
> stop.  I rolled the car onto the shoulder and waited with the hood up.
> Tried to start the car several times over a span of 10 minutes or so.
> Nothing, cranked fine but the engine didn't even think about starting.
> Eventually got the car to run and drove home bumping between first and
> second (ATX).
>
> Attempts at diagnosis:
> -plenty of fuel pressure (generous fountain at the Schrader
> valve)
> -KOEO codes, no. Did get 511 like always (LPM equipped)
> -The car refused to give KOER codes (I think this is a big clue,
> CCRM, IAC, or DIS module?)
>
> Questions:
> What would cause stumbling over bumpy asphalt?
> What might cause the KOER test to fail?
>
> I suppose I'll put a stock MAF on the car and pull the LPM and see what
> happens
>
>
> Mike Bruce