Old jeep won't start

My 85 CJ 258 won't start, it is getting fuel and fire. Plugs fire when
removed from cylinders and fuel atomizes in carb throat when pedal is
pushed. I tried priming in throat and directly in cylinders. At first It
would run very rough for a few seconds and then back fire and stall but now
it won't catch at all. What should I do next.

How did this come about? Was it running and then quit or?????

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)

mark wrote:
>
> My 85 CJ 258 won't start, it is getting fuel and fire. Plugs fire when
> removed from cylinders and fuel atomizes in carb throat when pedal is
> pushed. I tried priming in throat and directly in cylinders. At first It
> would run very rough for a few seconds and then back fire and stall but now
> it won't catch at all. What should I do next.

mark wrote:

> My 85 CJ 258 won't start, it is getting fuel and fire. Plugs fire when
> removed from cylinders and fuel atomizes in carb throat when pedal is
> pushed. I tried priming in throat and directly in cylinders. At first It
> would run very rough for a few seconds and then back fire and stall but now
> it won't catch at all. What should I do next.
>
>

How much fire? You can get a spark that isn't enought to burn fuel with
a weak coil. Timing will also throw everything out of whack and prevert
starting with a good spark & fuel. Same thing with carb adjustment.

As Mike Romain said :: was this running and parked and now won't start?
Sitting how long? Indoors or outdoors? Was something recently replaced
or repaired? It all matters to some degree.

Cheers,
- JJ

It sat for the winter but last fall it ran OK. I can't see the timing
playing a role since it has not changed since it last ran. One wierd thing I
noticed was that number one plug was dry when removed after a lot of priming
through the carb throat. Might there be an intake valve issue here?


"Keep YerSpam" > wrote in message
...
> mark wrote:
>
>> My 85 CJ 258 won't start, it is getting fuel and fire. Plugs fire when
>> removed from cylinders and fuel atomizes in carb throat when pedal is
>> pushed. I tried priming in throat and directly in cylinders. At first It
>> would run very rough for a few seconds and then back fire and stall but
>> now it won't catch at all. What should I do next.
>
> How much fire? You can get a spark that isn't enought to burn fuel with a
> weak coil. Timing will also throw everything out of whack and prevert
> starting with a good spark & fuel. Same thing with carb adjustment.
>
> As Mike Romain said :: was this running and parked and now won't start?
> Sitting how long? Indoors or outdoors? Was something recently replaced or
> repaired? It all matters to some degree.
>
> Cheers,
> - JJ
>

Those engines can flood like mad when primed. I would be taking all the
plugs out and drying/cleaning them first. If you can push on the gas
and it sprays inside the carb, you do not need any more prime than
that. You might even need to use wide open throttle to get it going.

Is the choke working?

I then would be checking out the distributor cap for carbon tracks. You
say you saw spark at one cylinder, you have 5 more. Condensation can
get inside there too. If it looks damp, WD40 is good for cleaning and
drying the insides. A weak spark can contribute to a flooded engine.

I would be leaning towards the flood though....

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)

mark wrote:
>
> It sat for the winter but last fall it ran OK. I can't see the timing
> playing a role since it has not changed since it last ran. One wierd thing I
> noticed was that number one plug was dry when removed after a lot of priming
> through the carb throat. Might there be an intake valve issue here?
>
> "Keep YerSpam" > wrote in message
> ...
> > mark wrote:
> >
> >> My 85 CJ 258 won't start, it is getting fuel and fire. Plugs fire when
> >> removed from cylinders and fuel atomizes in carb throat when pedal is
> >> pushed. I tried priming in throat and directly in cylinders. At first It
> >> would run very rough for a few seconds and then back fire and stall but
> >> now it won't catch at all. What should I do next.
> >
> > How much fire? You can get a spark that isn't enought to burn fuel with a
> > weak coil. Timing will also throw everything out of whack and prevert
> > starting with a good spark & fuel. Same thing with carb adjustment.
> >
> > As Mike Romain said :: was this running and parked and now won't start?
> > Sitting how long? Indoors or outdoors? Was something recently replaced or
> > repaired? It all matters to some degree.
> >
> > Cheers,
> > - JJ
> >

It may just be bad gas did you use any gas stabilizer?
Coasty

"Mike Romain" > wrote in message
...
> Those engines can flood like mad when primed. I would be taking all the
> plugs out and drying/cleaning them first. If you can push on the gas
> and it sprays inside the carb, you do not need any more prime than
> that. You might even need to use wide open throttle to get it going.
>
> Is the choke working?
>
> I then would be checking out the distributor cap for carbon tracks. You
> say you saw spark at one cylinder, you have 5 more. Condensation can
> get inside there too. If it looks damp, WD40 is good for cleaning and
> drying the insides. A weak spark can contribute to a flooded engine.
>
> I would be leaning towards the flood though....
>
> 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)
>
> mark wrote:
>>
>> It sat for the winter but last fall it ran OK. I can't see the timing
>> playing a role since it has not changed since it last ran. One wierd
>> thing I
>> noticed was that number one plug was dry when removed after a lot of
>> priming
>> through the carb throat. Might there be an intake valve issue here?
>>
>> "Keep YerSpam" > wrote in message
>> ...
>> > mark wrote:
>> >
>> >> My 85 CJ 258 won't start, it is getting fuel and fire. Plugs fire when
>> >> removed from cylinders and fuel atomizes in carb throat when pedal is
>> >> pushed. I tried priming in throat and directly in cylinders. At first
>> >> It
>> >> would run very rough for a few seconds and then back fire and stall
>> >> but
>> >> now it won't catch at all. What should I do next.
>> >
>> > How much fire? You can get a spark that isn't enought to burn fuel with
>> > a
>> > weak coil. Timing will also throw everything out of whack and prevert
>> > starting with a good spark & fuel. Same thing with carb adjustment.
>> >
>> > As Mike Romain said :: was this running and parked and now won't start?
>> > Sitting how long? Indoors or outdoors? Was something recently replaced
>> > or
>> > repaired? It all matters to some degree.
>> >
>> > Cheers,
>> > - JJ
>> >