While driving down the road this 4SD 2.2L OHV just shut off & now won't restart. All related fuses/relays are OK. The engine turns over, fuel pump turns on & their's a heavy spark on plug 1, but not so heavy on the others. Plugs have been replaced. Haven't check fuel pressure @ the fuel regulator & how in the world does one get to the ignition coil/ignition control module assembly which is located on the backside of the engine block..........