Ok. What car are you running? gearing and tire size? Is it a stock motor or IDM or modified? Is the pipe crushed anywhere? What fuel %? What plug?
Check for leaks... Take gas tank out, empty it and blow in the cap with fuel tubing and hold exit to carb. see if it leaks from gas cap or gas tank seams.
Take the pipe blow in the header as if the engine was pushing it's exhaust, put your finger in the exhaust stinger. see if air comes out the fuel tank connector. If not is clogged, soak the pipe in alcohol and blow with compresor. Check and replace all header gaskets and manifold. Use as little fuel tubing as possible. (remove any fuel filters and pipe filters in line with fuel tubing)
Carburator. is it sitting well on engine? is the linkage opening the carb more than it should? are you tunning it after is up to temp.
My high end is .15mm above collar (box stock red dot). low is hard to judge, you have to play with idle screw and low end screw.
Hope this helps. I run the motor in club races for obvious reasons. "affortable"
I hate to see you struggle with it. mine starts up everytime and runs like a champ. it's a good motor, like all machined equiptment some have flaws. if nothing work, call ofna. I'm sure they would like to keep you as a customer.
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