Hey guys, I have been having some issues trying to tune my dual webers.
I recently replaced my head gasket, now I am tuning the fuel system. Before I had to replace the head gasket, the carbs were leaking a bit of fuel out. Now, they are much worse.
Ive taken them off and synced the throttle bodies. Ive cleaned the jets in parts cleaner. I attempted to set the floats, but here lies my issue.
If I turn the key and prime the fuel pump and wait a minute, fuel dumps out of the carbs on the intake side-a lot. It will do this on both sets of carbs, but the left/rear most is the worst.
These are weber 40DCOE151 carbs. They do not appear in bad shape, I was going to adjust them with the uni-sun yesterday but it seemed like the fuel leak was only getting worse and worse.
What could be causing this leak?
When I attempt to test float bowl level, I start the car, idle for a few seconds, shut off, take out both main jets, then stick in my caliper for measurement. Correct bowl from the rim of the jet is 29mm +/- .5 correct?
To adjust the floats, I measured 12.5mm from the float to the gasket on the rim from the furthest point on the plastic float (end that travels the most). Then 25mm from the center of the float to the gasket for the most open point.
What did I miss? I am completely new to carbs, I understand the general aspect of how they work but this is my first go at setting them.
I did use a drill bit to measure the close position on the float.
I cleaned the little mesh filter in the caps.
If I test the floats off the car, I can close the float and blow through the tubes, and it will stop-no leaks from what i can find.
Silver 1974 Spider, 2014 Honda Accord