Re: Jeep CJ 258 Acceleration Issues. Please Help!
That is my guess. The accelerator pump gives the carb a little extra squirt
of gas when you accelerate quickly. When the engine is turned off you can hear / see it squirt as you pump the pedal. It is also adjustable if you need to have it provide more fuel. Another idea is fuel filter or fuel pump. "L.W. ("ßill") ------ III" <----------@cox.net> wrote in message news:42655D18.8C97B848@cox.net... > Then the accelerator pump doesn't work in either. > God Bless America, ßill O|||||||O > mailto:-------------------- http://www.----------.com/ > > Chris Hill wrote: >> >> Also I failed to mention that I had the carb rebuilt, and it still >> happened, and then I went out and bought a brand new carb, and it still >> happened. |
Re: Jeep CJ 258 Acceleration Issues. Please Help!
That is my guess. The accelerator pump gives the carb a little extra squirt
of gas when you accelerate quickly. When the engine is turned off you can hear / see it squirt as you pump the pedal. It is also adjustable if you need to have it provide more fuel. Another idea is fuel filter or fuel pump. "L.W. ("ßill") ------ III" <----------@cox.net> wrote in message news:42655D18.8C97B848@cox.net... > Then the accelerator pump doesn't work in either. > God Bless America, ßill O|||||||O > mailto:-------------------- http://www.----------.com/ > > Chris Hill wrote: >> >> Also I failed to mention that I had the carb rebuilt, and it still >> happened, and then I went out and bought a brand new carb, and it still >> happened. |
Re: Jeep CJ 258 Acceleration Issues. Please Help!
That is my guess. The accelerator pump gives the carb a little extra squirt
of gas when you accelerate quickly. When the engine is turned off you can hear / see it squirt as you pump the pedal. It is also adjustable if you need to have it provide more fuel. Another idea is fuel filter or fuel pump. "L.W. ("ßill") ------ III" <----------@cox.net> wrote in message news:42655D18.8C97B848@cox.net... > Then the accelerator pump doesn't work in either. > God Bless America, ßill O|||||||O > mailto:-------------------- http://www.----------.com/ > > Chris Hill wrote: >> >> Also I failed to mention that I had the carb rebuilt, and it still >> happened, and then I went out and bought a brand new carb, and it still >> happened. |
Re: Jeep CJ 258 Acceleration Issues. Please Help!
I would first unplug and block with a bolt, the EGR line to see what
happens. A dirty gas filter can cause that, especially if it isn't in right side up. It has 2 outlets, the center one goes to the carb, the 'top' one goes to the return line. The return needs to be up top or gas can go back to the tank too easy and can syphon empty causing long cold starts. Did you port the timing advance? I would use a light to see how the advance works while revving it. Sometimes folks forget to oil the felt pad under the rotor that keeps the timing advance plate moving and it seizes. How about gas octane? Too much alcohol in the gas will make them run like crap. Could the carb base plate have gotten flipped so you don't get manifold vacuum routed up into the carb like it is supposed to? The cut outs taper out and up to the carb. Just a thought, have seen that one before. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's Chris Hill wrote: > > Hey guys, I have an 84 CJ7 w/ 258 Carter BBD and T-4. It has the TFI > upgrade and the Nutter bypass. The motor runs very well at idle and at > constant rpm, but when I accelerate it bogs / stalls until the rpms > finally catch up w/ it then it runs great. I can put the pedal to the > floor (In any gear) and slowly let the pedal back up to about 1/2 and > the motor seems to catch back up. > > I was wondering what tests I can perform to see if my problem lies > within the fuel or the spark? I was trying to avoid just replacing > parts until I get the right one. I have the timing set at 9 degrees > BTDC. > > Any help would be greatly appreciated. > > Chris Hill > 84 CJ7 258, T-4 > tatehill@yahoo.com |
Re: Jeep CJ 258 Acceleration Issues. Please Help!
I would first unplug and block with a bolt, the EGR line to see what
happens. A dirty gas filter can cause that, especially if it isn't in right side up. It has 2 outlets, the center one goes to the carb, the 'top' one goes to the return line. The return needs to be up top or gas can go back to the tank too easy and can syphon empty causing long cold starts. Did you port the timing advance? I would use a light to see how the advance works while revving it. Sometimes folks forget to oil the felt pad under the rotor that keeps the timing advance plate moving and it seizes. How about gas octane? Too much alcohol in the gas will make them run like crap. Could the carb base plate have gotten flipped so you don't get manifold vacuum routed up into the carb like it is supposed to? The cut outs taper out and up to the carb. Just a thought, have seen that one before. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's Chris Hill wrote: > > Hey guys, I have an 84 CJ7 w/ 258 Carter BBD and T-4. It has the TFI > upgrade and the Nutter bypass. The motor runs very well at idle and at > constant rpm, but when I accelerate it bogs / stalls until the rpms > finally catch up w/ it then it runs great. I can put the pedal to the > floor (In any gear) and slowly let the pedal back up to about 1/2 and > the motor seems to catch back up. > > I was wondering what tests I can perform to see if my problem lies > within the fuel or the spark? I was trying to avoid just replacing > parts until I get the right one. I have the timing set at 9 degrees > BTDC. > > Any help would be greatly appreciated. > > Chris Hill > 84 CJ7 258, T-4 > tatehill@yahoo.com |
Re: Jeep CJ 258 Acceleration Issues. Please Help!
I would first unplug and block with a bolt, the EGR line to see what
happens. A dirty gas filter can cause that, especially if it isn't in right side up. It has 2 outlets, the center one goes to the carb, the 'top' one goes to the return line. The return needs to be up top or gas can go back to the tank too easy and can syphon empty causing long cold starts. Did you port the timing advance? I would use a light to see how the advance works while revving it. Sometimes folks forget to oil the felt pad under the rotor that keeps the timing advance plate moving and it seizes. How about gas octane? Too much alcohol in the gas will make them run like crap. Could the carb base plate have gotten flipped so you don't get manifold vacuum routed up into the carb like it is supposed to? The cut outs taper out and up to the carb. Just a thought, have seen that one before. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's Chris Hill wrote: > > Hey guys, I have an 84 CJ7 w/ 258 Carter BBD and T-4. It has the TFI > upgrade and the Nutter bypass. The motor runs very well at idle and at > constant rpm, but when I accelerate it bogs / stalls until the rpms > finally catch up w/ it then it runs great. I can put the pedal to the > floor (In any gear) and slowly let the pedal back up to about 1/2 and > the motor seems to catch back up. > > I was wondering what tests I can perform to see if my problem lies > within the fuel or the spark? I was trying to avoid just replacing > parts until I get the right one. I have the timing set at 9 degrees > BTDC. > > Any help would be greatly appreciated. > > Chris Hill > 84 CJ7 258, T-4 > tatehill@yahoo.com |
Re: Jeep CJ 258 Acceleration Issues. Please Help!
I would first unplug and block with a bolt, the EGR line to see what
happens. A dirty gas filter can cause that, especially if it isn't in right side up. It has 2 outlets, the center one goes to the carb, the 'top' one goes to the return line. The return needs to be up top or gas can go back to the tank too easy and can syphon empty causing long cold starts. Did you port the timing advance? I would use a light to see how the advance works while revving it. Sometimes folks forget to oil the felt pad under the rotor that keeps the timing advance plate moving and it seizes. How about gas octane? Too much alcohol in the gas will make them run like crap. Could the carb base plate have gotten flipped so you don't get manifold vacuum routed up into the carb like it is supposed to? The cut outs taper out and up to the carb. Just a thought, have seen that one before. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's Chris Hill wrote: > > Hey guys, I have an 84 CJ7 w/ 258 Carter BBD and T-4. It has the TFI > upgrade and the Nutter bypass. The motor runs very well at idle and at > constant rpm, but when I accelerate it bogs / stalls until the rpms > finally catch up w/ it then it runs great. I can put the pedal to the > floor (In any gear) and slowly let the pedal back up to about 1/2 and > the motor seems to catch back up. > > I was wondering what tests I can perform to see if my problem lies > within the fuel or the spark? I was trying to avoid just replacing > parts until I get the right one. I have the timing set at 9 degrees > BTDC. > > Any help would be greatly appreciated. > > Chris Hill > 84 CJ7 258, T-4 > tatehill@yahoo.com |
Re: Jeep CJ 258 Acceleration Issues. Please Help!
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!
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!
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. |
All times are GMT -4. The time now is 03:28 AM. |
© 2024 MH Sub I, LLC dba Internet Brands