Drag Racing Discussions > Front Engine Dragsters
Fuel injection too rich
jbraaflat:
Hey, thanks everyone. I'm going to check all your suggestions.
coupemerc:
If it is rich at idle, take a really close look at your barrel valve position and leak down. The barrel valve adjustment controls the fuel mixture at idle.
jbraaflat:
Looking at my barrel valve, I noticed the "54" on the spool valve is in the wrong location when at WOT. My leak-down was at 30% and was able to rev the engine. I'm going to make sure the spool valve is in the correct location according to the hilborn schematic. Thanks again.
dreracecar:
If you just fired it up from it sitting since last year and all you did was dry the lines at that point, there is no way that anything could change in the BV unless somebody took it apart. I would check the secondary/idle check valve to see if it is not stuck closed. After one set the throttle link to the BV, always paint one flat on the hex link. this will give you a quick visual if it was moved or if you do decide to move it a flat or two , that you do not get lost from where it was set.
masracingtd1167:
Check the link on the barrel valve . It could have slipped if it is not pinned .30 percent leakage sounds like a lot !
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