Re: engine codes what the....
 

So her are a few more ansewers to the questions:

spark plugs
dry black / they are champion brand.(new and old)

exhaust
the exhaust dosen't smell sweet it smells a little rich
We used a computer to pull the code the first time and we also earsed
it. today I earesed it by just un pluging the battery.

THe engine light has been on for about 2 to 3 months, but I didn't
worry about it it was running good. then all of sudden the light
started to flash why I was drivinh it and started to back fire. It
seems to idel ok but the bottom end wand why your on the gas, is
sluggish and back fires and spits. but full trottle it seams to run ok.

THanks for all the help you rule.let me know if there is anything else
you can think of.

Re: engine codes what the....
 

jeepnfonz wrote:
> So I have on engine code on my 2001 tj sport with the 4.0 in line six.
> the code is 0301 which I believe is misfire on cylinder one. which
> makes sense it back fires run like crap and no power. I replaced the
> spark plugs(easy and cheap fix). that solved the problem till I got
> after it and it started up again same code same symtoms does anyone
> have any clue what my next step would be what would be causing this. I
> don't really understand thenew system with no cap or rotor or wires
> please help......

Take a real close look at the spark rail and check for melty spots.
Some of them develop arcs internally and that causes all sorts of problems.

--
DougW

Re: engine codes what the....
 

jeepnfonz wrote:
> So I have on engine code on my 2001 tj sport with the 4.0 in line six.
> the code is 0301 which I believe is misfire on cylinder one. which
> makes sense it back fires run like crap and no power. I replaced the
> spark plugs(easy and cheap fix). that solved the problem till I got
> after it and it started up again same code same symtoms does anyone
> have any clue what my next step would be what would be causing this. I
> don't really understand thenew system with no cap or rotor or wires
> please help......

Take a real close look at the spark rail and check for melty spots.
Some of them develop arcs internally and that causes all sorts of problems.

--
DougW

Re: engine codes what the....
 

jeepnfonz wrote:
> So I have on engine code on my 2001 tj sport with the 4.0 in line six.
> the code is 0301 which I believe is misfire on cylinder one. which
> makes sense it back fires run like crap and no power. I replaced the
> spark plugs(easy and cheap fix). that solved the problem till I got
> after it and it started up again same code same symtoms does anyone
> have any clue what my next step would be what would be causing this. I
> don't really understand thenew system with no cap or rotor or wires
> please help......

Take a real close look at the spark rail and check for melty spots.
Some of them develop arcs internally and that causes all sorts of problems.

--
DougW

Re: engine codes what the....
 

jeepnfonz wrote:
> So I have on engine code on my 2001 tj sport with the 4.0 in line six.
> the code is 0301 which I believe is misfire on cylinder one. which
> makes sense it back fires run like crap and no power. I replaced the
> spark plugs(easy and cheap fix). that solved the problem till I got
> after it and it started up again same code same symtoms does anyone
> have any clue what my next step would be what would be causing this. I
> don't really understand thenew system with no cap or rotor or wires
> please help......

Take a real close look at the spark rail and check for melty spots.
Some of them develop arcs internally and that causes all sorts of problems.

--
DougW

Re: engine codes what the....
 

did you get the coil over plug boots bac on correctly???

jeepnfonz wrote:

> So I have on engine code on my 2001 tj sport with the 4.0 in line six.
> the code is 0301 which I believe is misfire on cylinder one. which
> makes sense it back fires run like crap and no power. I replaced the
> spark plugs(easy and cheap fix). that solved the problem till I got
> after it and it started up again same code same symtoms does anyone
> have any clue what my next step would be what would be causing this. I
> don't really understand thenew system with no cap or rotor or wires
> please help......

Re: engine codes what the....
 

did you get the coil over plug boots bac on correctly???

jeepnfonz wrote:

> So I have on engine code on my 2001 tj sport with the 4.0 in line six.
> the code is 0301 which I believe is misfire on cylinder one. which
> makes sense it back fires run like crap and no power. I replaced the
> spark plugs(easy and cheap fix). that solved the problem till I got
> after it and it started up again same code same symtoms does anyone
> have any clue what my next step would be what would be causing this. I
> don't really understand thenew system with no cap or rotor or wires
> please help......

Re: engine codes what the....
 

did you get the coil over plug boots bac on correctly???

jeepnfonz wrote:

> So I have on engine code on my 2001 tj sport with the 4.0 in line six.
> the code is 0301 which I believe is misfire on cylinder one. which
> makes sense it back fires run like crap and no power. I replaced the
> spark plugs(easy and cheap fix). that solved the problem till I got
> after it and it started up again same code same symtoms does anyone
> have any clue what my next step would be what would be causing this. I
> don't really understand thenew system with no cap or rotor or wires
> please help......

Re: engine codes what the....
 

did you get the coil over plug boots bac on correctly???

jeepnfonz wrote:

> So I have on engine code on my 2001 tj sport with the 4.0 in line six.
> the code is 0301 which I believe is misfire on cylinder one. which
> makes sense it back fires run like crap and no power. I replaced the
> spark plugs(easy and cheap fix). that solved the problem till I got
> after it and it started up again same code same symtoms does anyone
> have any clue what my next step would be what would be causing this. I
> don't really understand thenew system with no cap or rotor or wires
> please help......

Re: engine codes what the....
 

philthy wrote:
> did you get the coil over plug boots bac on correctly???
>
i think that i got the boot on correctly I have taken it ogg again and
put it on to make sure of that. Can you buy just new plug boots or do
you have to by a whole new spark rail.

Also dose anyone know what the compression should be I'm going to check
that out tomorrow. I would just like to thank everyone for all the
help. It's been great. I was really hoping that someone out there has
had this problem and knew just what it was...