I recently bought an 89 k20 with a small block tbi in it and replaced the alt and battery, everything seemed to be working mint. Took it out a few times in the mud and no problems! Until yesterday I went through some mud and it bogged down and stalled. I thought I may have got some water in it so I waited a few minutes like I did last time it happened. Tried starting it and it would not stay running, I had to tap the throttle half way down for it to stay running and even then it would still stall out. Now it won't start at all. Pulled the spark plugs, they were black but doesn't look like its from oil. Turned it over with out the plugs in to maybe get some of the water out of the cylinders. Put them back in, still nothing. What to do now?