new carb issue - i think Options

[william1764]

Finally corrected the serious backfire issue i had (IMG:style_emoticons/default/cheer.gif) exhaust leak was found (crack at header mount flange area) and repaired...long story but excessive/loud backfire on decel has been FINALLY eliminated. Overnight however i developed a sputtering/popping thru carbs. Uneven and rough acceleration up thru 3k RPM and higher. idle is irregular but constant - either a little high or a little low but steady...varies on the day. I have noticed since the carbs were rebuilt last september fuel mixture out of the exhaust at startup...i assume too rich? new plugs already dark. i've only put on a couple hundered miles since carb rebuild so not much experiance since rebuild.

what could happen to cause the engine/carbs to take such a drastic turn from one day to the next with touching them? Could this be valve issue?

for those not familar with past issues my set up is 74 2.0 with weber dual IDF 40's.

on another note, anyone in balt/dc going to hershey?

[BarberDave]

(IMG:style_emoticons/default/smilie_pokal.gif)

Check the idle jets, easy to remove just be carefull not to loose the O ring, it

can stick to the carb or to the jet, it's better to have something under them

or you will play Hell finding them on the engine or ground.

When you remove them holed them up to the light to check for dirt , blow them

out and replace. I am know expert be I think it runs on the isle circuit up to

3,000. They are very small and plug easly. It would be a good time to replace

the fuel filter. There right at the base on the outside ,( towards the fender )

easy to find. Finger tight

Mine did the same ,worked perfectly after , good luck ! Let us know, results.

Dave (IMG:style_emoticons/default/slap.gif)