98 300 drag spark plug problems

[JSB]

running a bullet bass boat with a 300 drag and the problem is it keeps fouling several plugs. i can put a new set in and within a few minutes they are fouled.any ideas on what is causing this? i need all the help i can get, thanks.

[Jay Smith]

JSB ,
Could be several problems . Have your injectors cleaned by Brucato 1 919 718 0249 if they are dirty your injector can be leaking by when it needs to be sealed off and flooding the bores fowling plugs. Mercury coils are marginal at best , isolate the plugs that are the notorious fowlers and swap coils of a known non fowler to that bore if the problem folllows the coil your problem is solved. Make sure you have a super hot battery ( 12.5 volts + ). If you have a stock Drag motor with 26 CC OEM factory compression heads ( 165 -175 lbs) your ECU should be on 100 at sea level. Make sure MAP sensor air barb is clean ( Air barb in plenium to the back of ECU ). Also make sure the fuel pressure is OK ( 38 lbs with gold regulator and 56 with black ) if the pressure is too high may indicate bad regulator and flooding will occur. Is your tac bouncing and acting goofy that can be a bad rectifier and make the motor running funny too !

Thats all I can think of @ 4:00 am LOL.......

Good luck !
Jay