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Author Topic:   carb problems
racer2x
Member
posted July 06, 2003 08:29 PM
i'm havin problems with my carb like i have cleaned it and it is still fouling the plugs and have done every thing i can think of to fix it i need some help

thanx

KPLugnut
Member
posted July 06, 2003 09:03 PM
First, what kind of carb is it and what engine is it on? What, if any, work has been done to the carb?
We'll need more info before we can help.

KP


racer2x
Member
posted July 06, 2003 09:48 PM
it is a kp carb on a 355 roller.they have done work to like cleaned it and some other stuff don't really know what but they are not runnin a return methanol flow back to tank and they think if they put that on ther it would fix it what do u think they should do.


KPLugnut
Member
posted July 07, 2003 09:40 AM
Well, probably one of the MOST important issues with an alky carb is fuel delivery. What sort of fuel pump is being used? What fuel pressure is there at idle? What size fuel lines are being used? Is the carb a 2bbl or 4bbl?
Since it's a KP carb, that means I personally built the thing, so I'm sure we can solve it.
Is the problem something that just started or was it doing this from the beginning?

Just let me know, and we'll fix ya up...

Dayton Umholtz, owner
Kinetic Performance


racer2x
Member
posted July 07, 2003 09:54 PM
it has not been doin it lond just started at harrisberg for the big races up there. it has a elbelbrock fuel pump not sure about the fuel on idlebut aftrer 10 laps it just want to die on me and when u get it started back up when you hit the bar it stalls before you get fuel to it and the sound comes out. it is a 4bbl carb and i have done every thing i can think of to try to fix it .thanx for the help


nut3d
Member
posted July 07, 2003 11:00 PM
are your fuel lines clean. also check the pick up had the same thing happen to me and thought it was the carb come to find out my pick up the tank was cloged.


KPLugnut
Member
posted July 08, 2003 08:09 AM
Sounds like it may in fact not be in the carb itself if you're sure there's no dirt clogging air bleeds or that it has a blown power valve or pump diaphram.
I'd look at the fuel pressure and whether it's just running out of fuel from a bad fuel pump, and then look into the possibility of a bad ignition system. One quick way to check if it's ignition related is to close the plug gaps down to about .025" and see if the problem changes or nearly goes away. If a plug gap change like that does some good, then it's ignition related.
Otherwise, like others have said, you could have a loose fuel line fitting as well.

Good luck and let us know,

KP

racer2x
Member
posted July 11, 2003 10:20 PM
thanx for the help it was the fuel lines thay where bad dirty thanx for the info


nut3d
Member
posted July 12, 2003 02:04 AM
No problem. Had that same problem in a heat race. lil peice of rtv cloged my pick up.


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