1997 TWIN 454 THUNDERBOLT IGNITION.<br />WENT OUT ON WATER,15MINS LATER STBS ENGINES SHUTS DOWN /LOOSE STEERING/ FOUND OUT IT WAS BAD COIL SWAPPED OUT PRT ONE GOT ME IN.<br />GET NEW COIL STBD RUNS GRT <br />PRT ONE NOW ONLY STARTS HALF OR WOT BACKS OFF SHUTS DOWN <br />SWAP OUT MODULE FROM ONE SIDE TO OTHER <br />SAME THING.<br />CHANGED EFI IN DIST.<br />SAME THING<br />CHECKED GAS LINE :WHEN TAKING IT OFF THE LINE TO FUEL PUMP TO CARB,HAD PRESSURE IN LINE IS THAT NORMAL? NO GAS IN CLEAR TUBE.<br />THE ONLY THING I DID NOT SWAP OUT TO SEE IF THAT IS THE PROBLEM /KNOCK SENSOR MODULE BLACK COMPONENT NEAR THE GRAY MODULE ATTACHED TO DIST.CHECKED WIRING PROPER SEQUENCE.<br />DOES THIS SOUND LIKE PUMP IS BAD IF SO HOW COME IT RUNS HALF OR WOT.<br />PULLED EACH WIRE WHILE RUNNING ALL CYLINDERS ARE FIRING... KEPT RUNNING...<br />ONLY THING LEFT IS SWAPP CAP/ KNOCK SENSOR <br />OR AM I BARKING UP THE WRONG TREE<br />NEED ADVICE A.S.A.P WHAT A SNAFU THIS IS,IT HAS NOW BECOME A CHALLENGE TO FIND OUT WHAT IS THE MATTER....WHAT AM I MISSING ALSO I HAVE MERC.MANUALS FOR ENGINES....<br /><br /><br />PLEASE RESPOND A.S.A.P.....<br /><br />THANKS<br />TINO