K 551 Weber kit

Did you take the computer out of the ignition loop? If not it has gone into limp home mode and clamped down on the timing.

It is an easy fix, I always add 2 new wires rather than mess inside the harness like the author of this link does:

You also might want to make put the timing advance to ported instead of the stock manifold vacuum.

I find the EGR valve causes a hesitation in mine with no computer running things. It goes away when I block the line.

I also hear that carb can be a bugger to get lean enough.

Mike

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

"Robb S via CarKB.com" wrote:

I put one of these on a 76 CJ 232 to which I adapted a 258 2bbl manifold. I got the Redline Weber jet kit and incresed the air correction jet one size in each barrel to reduce over-rich mixture and get rid of the stumble. Runs like a top.

Try these guys:

If they can't sell to you direct, try 4 Wheel Hardware or Quadratec.

I did not take the computer out of the loop. I did leave the vac. advance at the manifold and will try moving it. I'll try the computer thingie as well. Also, I haven't road tested it much yet, but the comment about it using alot of fuel seems to be accurate. Bill, you suggest reconnecting the charcoal cannister? I didn't think I would be losing that much for vapor, but..... I didn't pay much attention to the cannister hose routing when I disabled it because I planned on abandoning it. Any suggestions for me on how and where to route the three hoses? Also, the vapor line at the top of the carb, should that go to the vapor canister? I did disconnect the EGR valve vacuum line and plugged it.

The Weber has two vacuum ports, one for the ign advance, the other (further up the throttle plate travel) can be used for the emissions equipment, incl the canister. The kit comes with some fittings you can adapt for the PVC system, too.