My wife and two children were planning their summer trip to visit her family. Before leaving, I decided to do routine maintenance on her '95 Mazda Millenia, including changing the fuel filter. Following the shop manual procedure, I ran the engine while disconnecting the fuel pump relay to minimize gas in the line. Through a small access panel in the trunk, I had a very difficult time removing the old filter from the rusted bracket on top of the gas tank. After cutting through the old bracket, I had to devise a new way of securing the new fuel filter. Finally, I was finished and the car was ready for the five hour trip.
Once they reached their destination, my wife called to inform me that the car had been starting to hesitate toward the end of the trip, and now would not start at all. My heart sank as I realized that my work was not successful. I packed my tools and went to fix the car.
When I finally arrived, I checked the fuel pump relay and the fuel pump pressure, and surprisingly, both were OK. Still, I was convinced the problem was fuel related. Tired and upset, I started to grasp at straws and decided to remove one of the fuel injectors. My mistake was that I first did not void the fuel line, and a fair amount of gas leaked from the fuel rail into the cylinder.
Knowing that the gas needed to be removed from the cylinder, I removed the spark plug and cranked the engine. Gas shot up in the air and all over my tools in the trunk of the adjacent car. After cleaning up the mess, I was out of time, and I needed to take my wife and kids home. Broken, but not defeated, I borrowed a truck and rented a tow dolly to tow the car back home.
Once home, I changed the spark plugs, and surprisingly, the car would run, although somewhat rough and smoky. I attempted for days to find the elusive problem until at my wits end, I enlisted the help of a friend who is a professional mechanic.
The verdict: BAD GAS. I quickly mailed a note and a copy of the receipt to the gas station my wife had patronized on the trip. A few days later, I received a phone call from the gas station. "Sir, please look at your receipt. You did not pump mid-grade as you noted. You pumped diesel". My wife had allowed my six year-old son pump the "gas" for her!
Tom in Indiana
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