Re: Please help with diagnosis...
 

Sounds like what happened to me on a Dodge Ram. That turned out to be a
CPS. That took a while to figure that one out. I just put in an upstream
oxy sensor in my 97 TJ having similar problems to what you described and
what a DIFFERENCE!!! Of course I was getting the computer codes with the
key telling me what it was. What do your codes tell you if any? Good
luck,

Kevin
97 TJ

"Kelly J" <Kelly_member@newsguy.com> wrote in message
news:bgk97a0tmu@drn.newsguy.com...
: Hi, I've got a bit of a problem with my 98 TJ 4.0l 5 speed.
:
: Here's what happens...
:
: Around town, all is fine, but once I get on the highway for a while at
: consitantly higher rpms...around 2200 or so..at 65mph in 5th, it will
randomly,
: and without notice suddenly start to sputter, does a small backfire, and
the
: rpms drop immediatley. Adding gas does nothing but drop the rpms faster,
and
: all I can do is pull off the road before being forced to a stop in the
middle of
: the highway. It doesn't die, but will just sputter away at just under
regular
: idle speed. I have found that I can shut it off, and let it sit for a
minute,
: then restart..(no problems restarting), and I can sometimes continue for
a
: while, sometimes just a few hundred yards before it does it again. If I
can
: get to an exit, I can drive it all day around town with no problems.
:
: Here's what i've done so far...
:
: I changed the plugs, wires and distributor cap...no effect
:
: It did it once on the way to a job appointment, so I had to limp it to
the
: nearest dealer, and got a quick rental while they took a look at it.
: They of course could not duplicate the problem, but they ran a minimum
air flow
: test and it failed that, so they did an induction service, emisions
flush, and
: clenaed the throttle bore and induction system of carbon deposits.
: $125...I was glad to get out of the dealer with a bill that low..lol, and
I
: hoped that just maybe, that was the problem. Yep, you guessed it...no
effect!
:
: Has anyone experienced this type of thing before, and can advise me
furthur?
:
: Any help is appreciated.
:
: Regards, Kelly
:

Re: Please help with diagnosis...
 

Had a CPS problem, ran fine most of the time...then on occasion it would hesitate,
back fire, dog down, etc. Granted this was mostly when I put my foot in it, but not
always.



On Mon, 04 Aug 2003 03:19:14 GMT, "Nathan W. Collier" <abuse@A0L.com> wrote:

>>"L.W. (ßill) ------ III" <----------@cox.net> wrote in message
>>news:3F2DCFCE.50E66F4F@cox.net...
>>> Hi Kelly,
>>> The computer is being thrown into the limp mode, most likely the
>>> Crank Position Sensor:
>>
>>hi bill,
>>im curious about your recommendation. every CPS problem ive ever found, the
>>CPS was either good or bad......ive never seen it run fine at 1 rpm and
>>poorly at another.