Join Date: Feb 2002
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Carb Gurus Help Again
Background..... here is what I've got now... a 1989 258 with automatic and an original model Carter carb, most of my emmision stuff removed and plugged and was running pretty well til a few months ago.
Here's what I'm not doing..... I'm too cheap to buy the Weber and the Motorcraft 2100s I've found aren't worth rebuilding... its a VERY popular carb here on the coast.
Heres what I've done..... a buddy gave me a matching Carter to rebuild and see if that fixed my idle problems. I went through the carb very carefully and made sure I got it set-up exactly according to the specs provided. Turns out the idle cylinoid on the rebuilt carb was bad, the jeep would run but could not idle at all... just shut down without a lot of gas. Swapped the cylinoid off the original carb, now it runs. It runs great at anything over idle (accelerates, has power, no hesitation) but as soon as you take the foot off the accelerator, its starts to sputter like before. It doesn't kill until I apply the brakes however (stop signs, shifting automatic out of park, etc). I've adjusted the idle set screw on the side of the carb to increase the RPMs a little and it idles fine at 1000 rpm, apply the brake to shift into gear and it drops to 500 or less... sputters and kills.
What is going on? Vacuum? I now have two Carters which seem to be doing the same thing one rebuilt, one not.... therefore, its not likely the carb? UGH!!! Some help other than "Buy a weber" would be appreciated.