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Went through water about a foot deep and the enine hydrolocked. Got all of the water out and (aside from being loud) the car has ran ok for about a month. Then it started almost stalling (when the gas is pressed much beyond idle) going to normal idle and back and forth. Also, when the gas is pressed, there is a noticible dip in rpms and a lag in accelleration. The computer is throwing a map sensor code. I've replaced all vacuum tubes touching the throttle body, the map sensor, the fuel filter, cleaned the throttle body, and replace the spark plugs without lasting effect (when I replaced the map sensor, I was able to drive it 30 miles without much of a problem, when I replaced the vacuum lines it worked for 10 miles).
The lag seems to happen right away, and the stalling seems to happen when it is warmed up a bit.
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To remove the spark plugs and crank the engine round to rid the engine of the hydrolock is the correct thing to do.
Check there is 12volts getting to the starter motor and that the solenoid opperates correctly.
Recheck your wiring.
You will probably have to Dismantle the engine to replace the bent con rod,but first remove the spark plugs and see if the engine cranks over if it diesal take out the glow plugs.
hydrolock,take all spark plug off then crang the car till all water gone inside the cylinder chamber,then put all back together and hope nothing major damage.
Loud knocking is usually a "bad sign". If water got into the engine, and you tried to start it, you could have bent or broken rods. That's a major engine repair.
Did you crank the engine with the spark plugs out in order to discharge any water that may be trapped in the combustion chambers? Water cannot be compressed. Hope you didn't hydrolock it.
You filled the cylinders with water. You will need to remove all the spark plugs and crank the engine with them out, to push out the water. you will also want to replace the air filter as it is probably saturated with water.
if it is not too late, do NOT start it again-remove the plugs (all of them, it is a pain but it might save your engine) and remove the relay for the fuel pump-turn the car over, quickly just 2 or 3 seconds at a time, about 4 or 5 times. This will force water out of the plug area and the tops of the cylinders. DRAIN THE OIL AND REMOVE THE FILTER, use a turkey baster and put a SMALL AMOUNT of oil (a teaspoon full at most) in each cylinder, then fill the crank case with 6 quarts of fresh oil and a new filter. Install the plugs (if the look worn, good time to replace them) and start it up-you might have to replace the oil again if it looks AT ALL MILKY after running for a few minutes. If it is still making a loud banging noise, you had what is known as 'hydrolock' in one or more cylinders and it is probable that a piston or pistons are damaged and the engine is blown.
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