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Unread 03-14-2007, 07:39 PM   #1
daoliv
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Join Date: May 2004
Location: San Antonio
Posts: 44
Exhaust smoke and no idle Weber 34 conversion

I have not had a bunch of time to spend working on my CJ but I did finish my Weber carb conversion. It still has a hard time starting and will not hold an idle and also there is smoke coming from the exhaust which is dark gray. Dies when I lift my foot off of the gas. When I start it, it starts right up but will not stay on unless I press on the gas pedal. I checked all of the connections even held the choke plate open and it runs the same. Today it backfired once through the carb. Could this be a fuel pressure problem. I know it has a new fuel pump on it since the last on had a hole in the diaphram. I am thinking the pressure is to high since I did not put a fuel pressure regulator on it. I really do not want to mess with the fuel mixture yet or the ide screw.

Any help from anyone that knows what might be happening please help. I would like to get my baby back on the road.

Thanks,
David

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Unread 03-14-2007, 08:01 PM   #2
Bard
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1985 CJ7 
 
Join Date: Oct 2005
Location: The Granite State
Posts: 2,662
Backfiring is timing. I would set your timing, get a timing light and set it right. The Webers like 4 to 5 lbs of fuel pressure, a regulator does that. I know they prefer the holley FPR, I can't remember what model it is, someone else can chime in, Factory is 7lbs of fuel coming in. Check your fuel filter as well or just go new.
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Unread 03-14-2007, 10:42 PM   #3
Mr.Crowley
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1980 CJ7 
 
Join Date: Sep 2006
Location: nj
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yep you need a FPR and a return line back to the tank hooked up..Check your timing and for vacume leaks..
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