Re: Jeep CJ 258 Acceleration Issues. Please Help!
 

You think 9 degrees for full centripetal advance is too much????

The internal advance weights are full out at 1600 rpm on mine.

If it pings there it need a decarbon job which is easy to do.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

attnews wrote:
>
> 9 degrees sounds like too much ?? when you hear a ping, you are being given
> notice of such.
> "Chris Hill" <tatehill@gmail.com> wrote in message
> news:1114012254.890452.93760@g14g2000cwa.googlegro ups.com...
> > Thanks guys for the suggestions.
> > When I purchased the CJ 04/04 it was hard to crank when it was cold and
> > had some sort of miss in it that you could easily hear when it was
> > idling, but driving it at highway speeds it had plenty of power and no
> > hesitation when I accelerated but it did ping in 4th gear when under a
> > load. I decided to give it a tune up because I wasn't sure when the
> > last time it had one. I put a new dist cap, rotor, plugs, wires, fuel
> > filter (return line is at top), and had the original carter rebuilt.
> > The miss when it was idling or pinging didn't go away, but it still
> > drove fine after it warmed up so I decided to leave it alone since it
> > was my second vehicle and I only drove it on the weekends.
> >
> > I have since sold my primary vehicle and decided to make my jeep my
> > daily driver which was about a month ago. I decided I wanted to go
> > ahead and get the motor in great shape and do some mods / upgrades on
> > it that I have read about since I have owned my jeep. I started w/
> > wanting to get rid of the miss and pinging I kept hearing so I went and
> > did some research and decided to do an ignition upgrade to the TFI set
> > up, set the timing to 9 degrees BTDC @1600rpm, changed from manifold
> > (base of carb) vacuum advance to ported (side of carb), and It worked
> > like a champ, and voila no more miss! I then wanted to do the Nutter
> > Bypass (since I have heard nothing but good things about it) and did it
> > and voila no more Pinging!! However, it was at that time that I could
> > tell a faint acceleration issue when I pressed it all the way to the
> > floor, so I thought well that's just this old carb and I'll go out and
> > buy a new one. I decided to get one that didn't have the stepper motor
> > on it from a 79 CJ (had to change base plate) put it on, and the jeep
> > still idled fine, but the acceleration issue was worse I adjusted the 2
> > air mixture screws on the baseplate and got it a little better but
> > still was not good at all. I put my old carb back on, adjusted air mix
> > screws, and then it was a little better than the new carb but not good
> > at all. I went ahead and changed the fuel filter again yesterday and
> > still the same thing. I now am having to shift from 4th to 3rd to go
> > uphill (I didn't before). It's like the rpms haved changed. I did hear
> > it mildly backfiring when I downshifted yesterday so maybe the timing
> > is off still? Do I need to retard it some more? The EGR valve has been
> > plugged since I have owned the jeep, and since it ran so well before I
> > started modifying then I wouldn't think that was it. It's like I've
> > fixed a few problems only to discover a new one. Could I be getting too
> > much spark since I'm putting out more volts from the new coil? Would
> > you adjust the float level or Accelerator pump? I'm not sure still
> > where to start. Also, I am using bosch platinum plugs gapped at .045
> > for the TFI setup.
> > Sorry this was so long, but I wanted to make sure you knew the history.
> >

Re: Jeep CJ 258 Acceleration Issues. Please Help!
 

You think 9 degrees for full centripetal advance is too much????

The internal advance weights are full out at 1600 rpm on mine.

If it pings there it need a decarbon job which is easy to do.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

attnews wrote:
>
> 9 degrees sounds like too much ?? when you hear a ping, you are being given
> notice of such.
> "Chris Hill" <tatehill@gmail.com> wrote in message
> news:1114012254.890452.93760@g14g2000cwa.googlegro ups.com...
> > Thanks guys for the suggestions.
> > When I purchased the CJ 04/04 it was hard to crank when it was cold and
> > had some sort of miss in it that you could easily hear when it was
> > idling, but driving it at highway speeds it had plenty of power and no
> > hesitation when I accelerated but it did ping in 4th gear when under a
> > load. I decided to give it a tune up because I wasn't sure when the
> > last time it had one. I put a new dist cap, rotor, plugs, wires, fuel
> > filter (return line is at top), and had the original carter rebuilt.
> > The miss when it was idling or pinging didn't go away, but it still
> > drove fine after it warmed up so I decided to leave it alone since it
> > was my second vehicle and I only drove it on the weekends.
> >
> > I have since sold my primary vehicle and decided to make my jeep my
> > daily driver which was about a month ago. I decided I wanted to go
> > ahead and get the motor in great shape and do some mods / upgrades on
> > it that I have read about since I have owned my jeep. I started w/
> > wanting to get rid of the miss and pinging I kept hearing so I went and
> > did some research and decided to do an ignition upgrade to the TFI set
> > up, set the timing to 9 degrees BTDC @1600rpm, changed from manifold
> > (base of carb) vacuum advance to ported (side of carb), and It worked
> > like a champ, and voila no more miss! I then wanted to do the Nutter
> > Bypass (since I have heard nothing but good things about it) and did it
> > and voila no more Pinging!! However, it was at that time that I could
> > tell a faint acceleration issue when I pressed it all the way to the
> > floor, so I thought well that's just this old carb and I'll go out and
> > buy a new one. I decided to get one that didn't have the stepper motor
> > on it from a 79 CJ (had to change base plate) put it on, and the jeep
> > still idled fine, but the acceleration issue was worse I adjusted the 2
> > air mixture screws on the baseplate and got it a little better but
> > still was not good at all. I put my old carb back on, adjusted air mix
> > screws, and then it was a little better than the new carb but not good
> > at all. I went ahead and changed the fuel filter again yesterday and
> > still the same thing. I now am having to shift from 4th to 3rd to go
> > uphill (I didn't before). It's like the rpms haved changed. I did hear
> > it mildly backfiring when I downshifted yesterday so maybe the timing
> > is off still? Do I need to retard it some more? The EGR valve has been
> > plugged since I have owned the jeep, and since it ran so well before I
> > started modifying then I wouldn't think that was it. It's like I've
> > fixed a few problems only to discover a new one. Could I be getting too
> > much spark since I'm putting out more volts from the new coil? Would
> > you adjust the float level or Accelerator pump? I'm not sure still
> > where to start. Also, I am using bosch platinum plugs gapped at .045
> > for the TFI setup.
> > Sorry this was so long, but I wanted to make sure you knew the history.
> >

Re: Jeep CJ 258 Acceleration Issues. Please Help!
 

You think 9 degrees for full centripetal advance is too much????

The internal advance weights are full out at 1600 rpm on mine.

If it pings there it need a decarbon job which is easy to do.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

attnews wrote:
>
> 9 degrees sounds like too much ?? when you hear a ping, you are being given
> notice of such.
> "Chris Hill" <tatehill@gmail.com> wrote in message
> news:1114012254.890452.93760@g14g2000cwa.googlegro ups.com...
> > Thanks guys for the suggestions.
> > When I purchased the CJ 04/04 it was hard to crank when it was cold and
> > had some sort of miss in it that you could easily hear when it was
> > idling, but driving it at highway speeds it had plenty of power and no
> > hesitation when I accelerated but it did ping in 4th gear when under a
> > load. I decided to give it a tune up because I wasn't sure when the
> > last time it had one. I put a new dist cap, rotor, plugs, wires, fuel
> > filter (return line is at top), and had the original carter rebuilt.
> > The miss when it was idling or pinging didn't go away, but it still
> > drove fine after it warmed up so I decided to leave it alone since it
> > was my second vehicle and I only drove it on the weekends.
> >
> > I have since sold my primary vehicle and decided to make my jeep my
> > daily driver which was about a month ago. I decided I wanted to go
> > ahead and get the motor in great shape and do some mods / upgrades on
> > it that I have read about since I have owned my jeep. I started w/
> > wanting to get rid of the miss and pinging I kept hearing so I went and
> > did some research and decided to do an ignition upgrade to the TFI set
> > up, set the timing to 9 degrees BTDC @1600rpm, changed from manifold
> > (base of carb) vacuum advance to ported (side of carb), and It worked
> > like a champ, and voila no more miss! I then wanted to do the Nutter
> > Bypass (since I have heard nothing but good things about it) and did it
> > and voila no more Pinging!! However, it was at that time that I could
> > tell a faint acceleration issue when I pressed it all the way to the
> > floor, so I thought well that's just this old carb and I'll go out and
> > buy a new one. I decided to get one that didn't have the stepper motor
> > on it from a 79 CJ (had to change base plate) put it on, and the jeep
> > still idled fine, but the acceleration issue was worse I adjusted the 2
> > air mixture screws on the baseplate and got it a little better but
> > still was not good at all. I put my old carb back on, adjusted air mix
> > screws, and then it was a little better than the new carb but not good
> > at all. I went ahead and changed the fuel filter again yesterday and
> > still the same thing. I now am having to shift from 4th to 3rd to go
> > uphill (I didn't before). It's like the rpms haved changed. I did hear
> > it mildly backfiring when I downshifted yesterday so maybe the timing
> > is off still? Do I need to retard it some more? The EGR valve has been
> > plugged since I have owned the jeep, and since it ran so well before I
> > started modifying then I wouldn't think that was it. It's like I've
> > fixed a few problems only to discover a new one. Could I be getting too
> > much spark since I'm putting out more volts from the new coil? Would
> > you adjust the float level or Accelerator pump? I'm not sure still
> > where to start. Also, I am using bosch platinum plugs gapped at .045
> > for the TFI setup.
> > Sorry this was so long, but I wanted to make sure you knew the history.
> >

Re: Jeep CJ 258 Acceleration Issues. Please Help!
 

You know I never thought about that sticker being for the ford
emissions computer, and I just set it at that because I read when I
setup the TFI to set it at 9 degrees and looked at the sticker and it
said at 1600.
So you would recommend to set it at 9 degrees BTDC with vacuum line off
at idle or somewhere around this?
Yes, I set mine at full advance then. Nice.
Thanks again for all you help.

Re: Jeep CJ 258 Acceleration Issues. Please Help!
 

You know I never thought about that sticker being for the ford
emissions computer, and I just set it at that because I read when I
setup the TFI to set it at 9 degrees and looked at the sticker and it
said at 1600.
So you would recommend to set it at 9 degrees BTDC with vacuum line off
at idle or somewhere around this?
Yes, I set mine at full advance then. Nice.
Thanks again for all you help.

Re: Jeep CJ 258 Acceleration Issues. Please Help!
 

You know I never thought about that sticker being for the ford
emissions computer, and I just set it at that because I read when I
setup the TFI to set it at 9 degrees and looked at the sticker and it
said at 1600.
So you would recommend to set it at 9 degrees BTDC with vacuum line off
at idle or somewhere around this?
Yes, I set mine at full advance then. Nice.
Thanks again for all you help.

Re: Jeep CJ 258 Acceleration Issues. Please Help!
 

You know I never thought about that sticker being for the ford
emissions computer, and I just set it at that because I read when I
setup the TFI to set it at 9 degrees and looked at the sticker and it
said at 1600.
So you would recommend to set it at 9 degrees BTDC with vacuum line off
at idle or somewhere around this?
Yes, I set mine at full advance then. Nice.
Thanks again for all you help.

Re: Jeep CJ 258 Acceleration Issues. Please Help!
 

You know I never thought about that sticker being for the ford
emissions computer, and I just set it at that because I read when I
setup the TFI to set it at 9 degrees and looked at the sticker and it
said at 1600.
So you would recommend to set it at 9 degrees BTDC with vacuum line off
at idle or somewhere around this?
Yes, I set mine at full advance then. Nice.
Thanks again for all you help.

Re: Jeep CJ 258 Acceleration Issues. Please Help!
 

You know I never thought about that sticker being for the ford
emissions computer, and I just set it at that because I read when I
setup the TFI to set it at 9 degrees and looked at the sticker and it
said at 1600.
So you would recommend to set it at 9 degrees BTDC with vacuum line off
at idle or somewhere around this?
Yes, I set mine at full advance then. Nice.
Thanks again for all you help.

Re: Jeep CJ 258 Acceleration Issues. Please Help!
 

You know I never thought about that sticker being for the ford
emissions computer, and I just set it at that because I read when I
setup the TFI to set it at 9 degrees and looked at the sticker and it
said at 1600.
So you would recommend to set it at 9 degrees BTDC with vacuum line off
at idle or somewhere around this?
Yes, I set mine at full advance then. Nice.
Thanks again for all you help.