s2erst

Hi I just fitted new engine to my esc cos and now has no spark. If i put a plug in one of the leads you get a small spark when you turn on and off the ignition but nothing while cranking. pump doesn't prime unless I unplug the blue sensor on passage side of block the pump will prime but as soon as I plug it back in it stops. running out of idea's now

studabear

big turbo model?

is the crank sensor gapped correctly and are all the 4 lugs intact?