1999 JCS Engine Misfires in Reverse
 

Cylinder #1 floods when it's put in reverse. Hesitates occasionally in
drive.
ECM was replaced, same problem
Any ideas?

Re: 1999 JCS Engine Misfires in Reverse
 

What engine?

I would be looking for a harness that was too close to the exhaust or
was really tight I think. When you put it in reverse, the engine moves
which could cause a harness to hit the exhaust or be pulled on even,
especially if you had a weak engine mount.

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)

PhilsTV wrote:
>
> Cylinder #1 floods when it's put in reverse. Hesitates occasionally in
> drive.
> ECM was replaced, same problem
> Any ideas?

Re: 1999 JCS Engine Misfires in Reverse
 

What engine?

I would be looking for a harness that was too close to the exhaust or
was really tight I think. When you put it in reverse, the engine moves
which could cause a harness to hit the exhaust or be pulled on even,
especially if you had a weak engine mount.

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)

PhilsTV wrote:
>
> Cylinder #1 floods when it's put in reverse. Hesitates occasionally in
> drive.
> ECM was replaced, same problem
> Any ideas?

Re: 1999 JCS Engine Misfires in Reverse
 

What engine?

I would be looking for a harness that was too close to the exhaust or
was really tight I think. When you put it in reverse, the engine moves
which could cause a harness to hit the exhaust or be pulled on even,
especially if you had a weak engine mount.

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)

PhilsTV wrote:
>
> Cylinder #1 floods when it's put in reverse. Hesitates occasionally in
> drive.
> ECM was replaced, same problem
> Any ideas?

Re: 1999 JCS Engine Misfires in Reverse
 

Perhaps a leaking injector? You say it only leaks in reverse?


"PhilsTV" <philstv@yahoo.com> wrote in message
news:03272a38e42d69fec6a4da6e981bea04@localhost.ta lkaboutautos.com...
> Cylinder #1 floods when it's put in reverse. Hesitates occasionally in
> drive.
> ECM was replaced, same problem
> Any ideas?
>

Re: 1999 JCS Engine Misfires in Reverse
 

Perhaps a leaking injector? You say it only leaks in reverse?


"PhilsTV" <philstv@yahoo.com> wrote in message
news:03272a38e42d69fec6a4da6e981bea04@localhost.ta lkaboutautos.com...
> Cylinder #1 floods when it's put in reverse. Hesitates occasionally in
> drive.
> ECM was replaced, same problem
> Any ideas?
>

Re: 1999 JCS Engine Misfires in Reverse
 

Perhaps a leaking injector? You say it only leaks in reverse?


"PhilsTV" <philstv@yahoo.com> wrote in message
news:03272a38e42d69fec6a4da6e981bea04@localhost.ta lkaboutautos.com...
> Cylinder #1 floods when it's put in reverse. Hesitates occasionally in
> drive.
> ECM was replaced, same problem
> Any ideas?
>

Re: 1999 JCS Engine Misfires in Reverse
 

"PhilsTV" <philstv@yahoo.com> wrote in message
news:03272a38e42d69fec6a4da6e981bea04@localhost.ta lkaboutautos.com...
> Cylinder #1 floods when it's put in reverse. Hesitates occasionally in
> drive.
> ECM was replaced, same problem
> Any ideas?
>

The injectors have power applied all the time with the key on. The ECM
controls the ground to the injectors. Follow the ground wire from the #1
injector back to the ECM. Wire should be White/ Dk Blue. Look for the wiring
harness being pinched/chafed when vehicle is put into reverse. The ground
wire is most likely being shorted to ground which causes the injector to
stay open.

Re: 1999 JCS Engine Misfires in Reverse
 

"PhilsTV" <philstv@yahoo.com> wrote in message
news:03272a38e42d69fec6a4da6e981bea04@localhost.ta lkaboutautos.com...
> Cylinder #1 floods when it's put in reverse. Hesitates occasionally in
> drive.
> ECM was replaced, same problem
> Any ideas?
>

The injectors have power applied all the time with the key on. The ECM
controls the ground to the injectors. Follow the ground wire from the #1
injector back to the ECM. Wire should be White/ Dk Blue. Look for the wiring
harness being pinched/chafed when vehicle is put into reverse. The ground
wire is most likely being shorted to ground which causes the injector to
stay open.

Re: 1999 JCS Engine Misfires in Reverse
 

"PhilsTV" <philstv@yahoo.com> wrote in message
news:03272a38e42d69fec6a4da6e981bea04@localhost.ta lkaboutautos.com...
> Cylinder #1 floods when it's put in reverse. Hesitates occasionally in
> drive.
> ECM was replaced, same problem
> Any ideas?
>

The injectors have power applied all the time with the key on. The ECM
controls the ground to the injectors. Follow the ground wire from the #1
injector back to the ECM. Wire should be White/ Dk Blue. Look for the wiring
harness being pinched/chafed when vehicle is put into reverse. The ground
wire is most likely being shorted to ground which causes the injector to
stay open.