paul

93 YJ 4.0 automatic

Are there any recommended procedures for checking for a spark problem?

Vacuum leaks?

tranny shop tells me that the transmission is good and that I either have a
spark or vacuum problem --- I feel like I'm getting the run around but want
to explore all possibilities before calling the guy a thief.

tia
paul

Earle Horton

What is the problem? Describe what is/what is not happening with the
vehicle. I take it your transmission isn't shifting right, or has some
other transmission-related problem. If there were a spark problem, you
would notice the engine running rough. It would be odd for spark, or lack
thereof, to only affect the transmission.

Earle

"paul" <SPAMpdrapeau@wi.rr.com> wrote in message
news:46264e74$0$21074$4c368faf@roadrunner.com...
> 93 YJ 4.0 automatic
>
> Are there any recommended procedures for checking for a spark problem?
>
> Vacuum leaks?
>
> tranny shop tells me that the transmission is good and that I either have
a
> spark or vacuum problem --- I feel like I'm getting the run around but
want
> to explore all possibilities before calling the guy a thief.
>
> tia
> paul
>
>

Earle Horton

What is the problem? Describe what is/what is not happening with the
vehicle. I take it your transmission isn't shifting right, or has some
other transmission-related problem. If there were a spark problem, you
would notice the engine running rough. It would be odd for spark, or lack
thereof, to only affect the transmission.

Earle

"paul" <SPAMpdrapeau@wi.rr.com> wrote in message
news:46264e74$0$21074$4c368faf@roadrunner.com...
> 93 YJ 4.0 automatic
>
> Are there any recommended procedures for checking for a spark problem?
>
> Vacuum leaks?
>
> tranny shop tells me that the transmission is good and that I either have
a
> spark or vacuum problem --- I feel like I'm getting the run around but
want
> to explore all possibilities before calling the guy a thief.
>
> tia
> paul
>
>

Earle Horton

What is the problem? Describe what is/what is not happening with the
vehicle. I take it your transmission isn't shifting right, or has some
other transmission-related problem. If there were a spark problem, you
would notice the engine running rough. It would be odd for spark, or lack
thereof, to only affect the transmission.

Earle

"paul" <SPAMpdrapeau@wi.rr.com> wrote in message
news:46264e74$0$21074$4c368faf@roadrunner.com...
> 93 YJ 4.0 automatic
>
> Are there any recommended procedures for checking for a spark problem?
>
> Vacuum leaks?
>
> tranny shop tells me that the transmission is good and that I either have
a
> spark or vacuum problem --- I feel like I'm getting the run around but
want
> to explore all possibilities before calling the guy a thief.
>
> tia
> paul
>
>

Earle Horton

What is the problem? Describe what is/what is not happening with the
vehicle. I take it your transmission isn't shifting right, or has some
other transmission-related problem. If there were a spark problem, you
would notice the engine running rough. It would be odd for spark, or lack
thereof, to only affect the transmission.

Earle

"paul" <SPAMpdrapeau@wi.rr.com> wrote in message
news:46264e74$0$21074$4c368faf@roadrunner.com...
> 93 YJ 4.0 automatic
>
> Are there any recommended procedures for checking for a spark problem?
>
> Vacuum leaks?
>
> tranny shop tells me that the transmission is good and that I either have
a
> spark or vacuum problem --- I feel like I'm getting the run around but
want
> to explore all possibilities before calling the guy a thief.
>
> tia
> paul
>
>

Mike Romain

The throttle position sensor is notorious forgetting a bad connection.
It controls the shift points on the tranny.

I recommend an electronic spray contact cleaner on it, well all of the
computer sensor plugs for that matter like like CPS. I then like to rub
some dielectric grease on the plug's seal skirt.

WD40 will even work in a pinch, it just doesn't last long.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

paul wrote:
> 93 YJ 4.0 automatic
>
> Are there any recommended procedures for checking for a spark problem?
>
> Vacuum leaks?
>
> tranny shop tells me that the transmission is good and that I either have a
> spark or vacuum problem --- I feel like I'm getting the run around but want
> to explore all possibilities before calling the guy a thief.
>
> tia
> paul
>
>

Mike Romain

The throttle position sensor is notorious forgetting a bad connection.
It controls the shift points on the tranny.

I recommend an electronic spray contact cleaner on it, well all of the
computer sensor plugs for that matter like like CPS. I then like to rub
some dielectric grease on the plug's seal skirt.

WD40 will even work in a pinch, it just doesn't last long.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

paul wrote:
> 93 YJ 4.0 automatic
>
> Are there any recommended procedures for checking for a spark problem?
>
> Vacuum leaks?
>
> tranny shop tells me that the transmission is good and that I either have a
> spark or vacuum problem --- I feel like I'm getting the run around but want
> to explore all possibilities before calling the guy a thief.
>
> tia
> paul
>
>

Mike Romain

The throttle position sensor is notorious forgetting a bad connection.
It controls the shift points on the tranny.

I recommend an electronic spray contact cleaner on it, well all of the
computer sensor plugs for that matter like like CPS. I then like to rub
some dielectric grease on the plug's seal skirt.

WD40 will even work in a pinch, it just doesn't last long.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

paul wrote:
> 93 YJ 4.0 automatic
>
> Are there any recommended procedures for checking for a spark problem?
>
> Vacuum leaks?
>
> tranny shop tells me that the transmission is good and that I either have a
> spark or vacuum problem --- I feel like I'm getting the run around but want
> to explore all possibilities before calling the guy a thief.
>
> tia
> paul
>
>

Mike Romain

The throttle position sensor is notorious forgetting a bad connection.
It controls the shift points on the tranny.

I recommend an electronic spray contact cleaner on it, well all of the
computer sensor plugs for that matter like like CPS. I then like to rub
some dielectric grease on the plug's seal skirt.

WD40 will even work in a pinch, it just doesn't last long.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

paul wrote:
> 93 YJ 4.0 automatic
>
> Are there any recommended procedures for checking for a spark problem?
>
> Vacuum leaks?
>
> tranny shop tells me that the transmission is good and that I either have a
> spark or vacuum problem --- I feel like I'm getting the run around but want
> to explore all possibilities before calling the guy a thief.
>
> tia
> paul
>
>

paul

It started awhile back with slow acceleration from a dead stop then at
freeway speeds if I tried to pass the RPM's would shoot up to 3500 and there
would be no drive train response.

Took it to a transmission shop they did a 'rebuild' of the tranny - I got
it back still had the same problem but now it was more noticeable that it
was not shifting properly from 1st to 2nd - rpm's increased - no shift
unless I let off on the throttle. Took it back again, and was told they
tried adjusting the shift points both earlier and later with no favorable
results and that they feel that there is a spark/ vacuum issue.

Now the symptoms are the same except at freeway speed it will no longer
kick up the rpm's - just plods along at 60 mph.

If I shift to neutral I can get an rpm response on the freeway but not while
in gear.

?????



"Earle Horton" <gracioso@latino.usa> wrote in message
news:Fo2dnVnd3Ok50rvbnZ2dnUVZ_j2dnZ2d@comcast.com. ..
> What is the problem? Describe what is/what is not happening with the
> vehicle. I take it your transmission isn't shifting right, or has some
> other transmission-related problem. If there were a spark problem, you
> would notice the engine running rough. It would be odd for spark, or lack
> thereof, to only affect the transmission.
>
> Earle
>
> "paul" <SPAMpdrapeau@wi.rr.com> wrote in message
> news:46264e74$0$21074$4c368faf@roadrunner.com...
>> 93 YJ 4.0 automatic
>>
>> Are there any recommended procedures for checking for a spark problem?
>>
>> Vacuum leaks?
>>
>> tranny shop tells me that the transmission is good and that I either have
> a
>> spark or vacuum problem --- I feel like I'm getting the run around but
> want
>> to explore all possibilities before calling the guy a thief.
>>
>> tia
>> paul
>>
>>
>
>