First, there may be confusion among us regarding what you mean by "spark plug holes" Are you talking about: 1) With the plugs out, looking into the actual cylinders or, 2) You're talking about removing the plug WIRES and looking down into the plug "tunnels" (which are the holes between the cams where the wires run down to the plugs). If you mean (1) - blown head gasket/cracked head, etc, but if you mean (2) (and I'm taking a wild guess thinking that's what you mean) most likely your plug wires, which snap into the top holes of the "tunnels" are probably cracked or not seating properly. I had this problem when my Capri was parked outside for several months, at one point getting buried by a blizzard. The next spring it wouldn't start and barely even fired at all. I replaced plugs and wires (while also drying out the "tunnels" using paper towels to simply absorb the water little by little...uh, BEFORE removing the plugs too by the way) and bingo, she fired right up and ran like a raped ape. The new wires eliminated the water problem and the tunnels have remained dry ever since.
2 reasons:
If water has entered your fuel tank, it will fill up bottom first water has higher density than petrol/gas tank and the fuel pump, whose inlet from the fuel tank is near the bottom of the tank, will be drawn first by the fuel pump when the engine has been cranked the first time, when anyone tried to start the ignition, the fuel is to be delivered in equal quantity to each cylinder.
Check the fuel tank first by removing the joint of the outlet of the tank to check what pours out?
This cannot happen by accident, but somebody has deliberately poured water into the fuel tank!! Its just not practical, unless there were any flood and the vehicle was stranded with the water level high enough to be over the engine block.
However whatever the case may be, there's water in your fuel tank, and has to be drained entirely, dried ot plus removing the outlet from the tank to remove water from the pipeline &/or some amount of fuel forced into the intake to remove the accumulated water ............sodeep
You have either a blown head gasket, a cracked block or a cracked head. The head has to be removed to fix the cheapest problem, the head gasket so, make sure the block & head get checked too.
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