When the CPS goes bad, the vehicle usually up and dies. The plug and
socket for it can and do get dirty though, but again that usually causes
a stall. There are no shims on it, it just fits in one spot. People do
try to alter it for modified vehicles, but that isn't normal use.
Mike
Casper wrote:
>
> >Wow......
> >
> >I too would be suspecting the junkyard brain. Maybe a 'new' one would
> >be in order.
>
> Yeah, it is definitly a suspect. I hope to know either later today or
> in the next couple of days. Since I have access to a newer one (not
> new tho), I am hoping that will help resolve things if it's needed.
>
> >And FYI, I know that some 258 and apparently some 4.0 engines won't run
> >on bosch plugs. The plugs foul black very quickly and the engine misses
> >like a bugger. When I switch them to Champion plugs they run fine.
>
> I have heard that, but have been using the Bosch for a number of years
> on several of my vehicles and have yet to see this occur, until just
> now. I'd be in agreement if it weren't for the fact that the other
> plug brands are also fouling right now in the Jeep.
>
> >I likely mentioned this before, but when you have a missing or broken
> >ground path, the vehicle can steal grounds through things like gas
> >cables and radios and shifters and brake pedals. This normally causes
> >all kinds of seemingly unrelated issues usually computer or sensor
> >related. One main computer ground tag point is usually a bolt into the
> >block near the dipstick. There are a mess of black wires there.
> >Sometimes one gets dropped out when it gets hooked up.
> >Mike
>
> Yep, went over this near the beginning of this saga. Checked them over
> several times and found nothing. Although, since I know some of the
> wiring has been replaced due to damage/shorting in the accident, I
> keep reminding the mechanics that there still may be something they
> have yet to locate.
>
> Another concern mentioned to me was that the CPS (Crank Position
> Sensor) may have a shim issue and or been damaged. I'm not too
> familiar with how the vehicle can react with a damamged one, but I am
> hoping this has also been looked at. I've got one mechanic saying his
> tests show it's bad and a second mechanic saying it's good. Bear in
> mind, it's already been replaced once, same time as the PCM.
>
> Thanks for the input Mike!
>
> `Casper
>
> I plan to post what the final outcome is so hopefully no one else will
> ever have to go thru this and glean some useful information from my
> problems and saga.