So, being a first time driver, I know very little about cars and car maintenance. I bought a used 1999 Nissan Altima a few days ago and decided to take it to a car wash center. One of the wash options was engine cleaner. Not knowing exactly what this was, I popped the hood and proceeded to spray down my engine with high pressure engine cleaner. Afterwards, I switched to the rinse cycle and blasted away any remaining cleanser. The engine looked significantly cleaner and I was satisfied for the time being. The next day, I noticed that anytime I slowed to a stop, the car would start shaking intensely. Once I got up to a higher speed it stopped shaking as much but still did not run smoothly. Later, the car would often die as I was sitting at a traffic light or pulling in/out of a parking lot. A mechanic who happened to be in the parking lot took a look at the engine and told me that the filter was wet and needed to dry out. I later went and purchased a new filter and refilled the coolant in the car. Roughly 6 hours later the car was still having the same problems and is now having trouble starting. I am looking for any possible diagnosis and possible solution to this problem. I would really appreciate any input you have to offer.

Thanks,
Alex

Water is in your distributor cap. Follow the plug wires from the plugs to the cap, remove the cap and dry out all the moisture inside. Do not mix up the plug wires. You may have to repeat this process if water has entered the distributor. if its just damp or moist once might get you by.