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-   -   Atomic 4 backfiring thru carb, no power (http://www.sailnet.com/forums/atomic-4/90217-atomic-4-backfiring-thru-carb-no-power.html)

Sootydan 07-27-2012 04:16 PM

Atomic 4 backfiring thru carb, no power
 
My A4 has a new electronic distributor, new plug wires,new carb, plugs are wired 1243 to distributor correctly, in neutral it still backs thru carb some, when increasing throttle. In gear it back fires thru carb badly. Distributor installed correctly,checked firing order(plug wires) again, engine has 90-100 lbs (dry test) wiring to coil good,coil has 3.8-4 ohms internal resistance. I added some mystery oil to the fuel and ran the engine for awhile hoping to free up a possibly sticking intake valve . Any ideas what to check next? thanks

sea_hunter 07-27-2012 04:22 PM

Your wires are crossed.

Sootydan 07-27-2012 08:11 PM

Re: Atomic 4 backfiring thru carb, no power
 
They rae if the distributor rotates clockwise. I have then counter clockwise as that was the way it was when i got the boat .....hmmmmm

Sootydan 07-28-2012 11:08 AM

Re: Atomic 4 backfiring thru carb, no power
 
Wires WERE on distributor in wrong direction, thank you for your help

sea_hunter 07-28-2012 12:49 PM

Quote:

Originally Posted by Sootydan:902360
Wires WERE on distributor in wrong direction, thank you for your help

You're welcome. :D

Sailboatlarry 07-28-2012 02:38 PM

Re: Atomic 4 backfiring thru carb, no power
 
The only way you can backfire through your carb that I know of is, You are firing with your intake valve still open. So either your timing, Firing order is way off or you have a sticky valve.

dabnis 07-28-2012 03:02 PM

Re: Atomic 4 backfiring thru carb, no power
 
Many years ago when cars had carburetors I can recall back firing through the carb when you get an extremely sudden lean condition, like when running out of gas or a float valve sticking shut.

Paul T


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