Mike Romain

I don't know holly carbs so can't help there.

Maybe I can help on the vacuum stuff. I would be checking the PCV
system first. Stock the PCV line comes to the back of the carb to a
solenoid thing and from there goes to the carb base and to the charcoal
canister.

When the charcoal canister fails, and yours is at the right age, it
won't idle any more and usually surges some.

To test, at idle pinch the PCV line from the back of the carb to the
canister shut. If the idle changes at all, the canister is dead and the
carb will never set stable.

As for the rest of the vacuum crap, here is a link on putting the
computer to sleep for a sweet 25% power boost with all the main vacuum
stuff listed. Your computer is either properly wired to sleep like the
link says or it has gone into 'limp home mode' and clamped down on the
timing and things because there is no feedback carb in there anymore.

http://home.sprynet.com/~dale02/ignmods.htm

It will run like crap with the wrong carb and computer still trying to
adjust things.

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

John D wrote:
>
> I have a 1990 wrangler 4.2L 5 speed with an 2300 Holley on it. This is the
> way I bought it. I had the carb rebuilt and changed the wires, plugs, cap,
> rotor, and coil. The thing does not run right.. It will not idle. I have a
> zillion vaccum hoses that need to go somewhere. Am I better off replacing
> everything with the stock carb or is there a good reason people put Holleys
> on them.. I did buy the haynes manual for it. But since the carb is
> different, it does not help much...
>
> I did the auto choke upgrade to the carb also...
>
> Thanks in advance for any help.
>
> John

Mike Romain

I don't know holly carbs so can't help there.

Maybe I can help on the vacuum stuff. I would be checking the PCV
system first. Stock the PCV line comes to the back of the carb to a
solenoid thing and from there goes to the carb base and to the charcoal
canister.

When the charcoal canister fails, and yours is at the right age, it
won't idle any more and usually surges some.

To test, at idle pinch the PCV line from the back of the carb to the
canister shut. If the idle changes at all, the canister is dead and the
carb will never set stable.

As for the rest of the vacuum crap, here is a link on putting the
computer to sleep for a sweet 25% power boost with all the main vacuum
stuff listed. Your computer is either properly wired to sleep like the
link says or it has gone into 'limp home mode' and clamped down on the
timing and things because there is no feedback carb in there anymore.

http://home.sprynet.com/~dale02/ignmods.htm

It will run like crap with the wrong carb and computer still trying to
adjust things.

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

John D wrote:
>
> I have a 1990 wrangler 4.2L 5 speed with an 2300 Holley on it. This is the
> way I bought it. I had the carb rebuilt and changed the wires, plugs, cap,
> rotor, and coil. The thing does not run right.. It will not idle. I have a
> zillion vaccum hoses that need to go somewhere. Am I better off replacing
> everything with the stock carb or is there a good reason people put Holleys
> on them.. I did buy the haynes manual for it. But since the carb is
> different, it does not help much...
>
> I did the auto choke upgrade to the carb also...
>
> Thanks in advance for any help.
>
> John