Monday, June 1st, 2015 AT 12:07 AM
It recently flooded here in Houston. We drove the van through a little over a foot of water and it stalled. The tailpipe was not submerged. We pushed it the rest of the way to our driveway. We drained the water and the oil. No cross contamination. We also replaced the spark plugs with what O'Reily's looked up and said was appropriate plugs. The 1-3-5 plugs were mistakingly crossed. The car was started and revved, but never placed in gear or driven with them crossed. Since they were placed correctly, there is a knocking sound when placed in gear and when driven forward and back. We have only done this in the driveway, not actually driven it. We poured one can of Seafoam in the engine and one can of Seafoam in the fuel tank. There was no change in the knocking and still not actually driven, just a little back and forward in the drive. What is most likely the problem and may it be driven?