Quote:
Originally Posted by Sieg
Big flat spot (as I'd call it) no blubbering, then it's fine. If I rev it and don't let it come all the way down to the 1K idle, say 1500 rpm, and crack the throttle it's fine. This has all been while actuating the throttle by hand.
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Then I agree with Todd's posts.
Blubbering = to much fuel
Dead spot = not enough fuel. ie squirters or accelerator pump or cam, maybe even PV . Is the accelerator pump arm gap adj properly?
You could try and push the primeary accelerator pump arm almost all the way down by hand just as you crack the throttle from idle or a split second before, which will send a bunch of fuel in. If it doesn't have a dead spot then this will tell you it's lack of fuel right at the hit. Just and old school trick. YES eng temp can effect and or make the stumble too
Have you thought about blocking off the PV's (if you have 2) jetting it up a few sizes and trying it again? I took the PV's out of mine and it runs better down low