Hi HMAC300. I cannot help but stick my nose in here again with two comments of wondrous value, then I will leave you guys alone. First of all, the fuel pump had better not be running unless the engine is running, and that is what you found. If it would run anytime the ignition switch is on, you would have a major fire hazard. If a fuel line gets ruptured in a crash, it will dump raw gas onto the ground. With no fuel pressure, the engine cannot run. With a stalled engine there wont be any signal from the crankshaft position sensor and / or camshaft position sensor. Missing those signals is what tells the Engine Computer to turn the fuel pump off. All you might hear is the hum of the fuel pump for one second after turning on the ignition switch. It wont turn back on until there is engine rotation, (cranking or running).
Second, only Chrysler has never needed a mass air flow sensor to make their engines run right. All other manufacturers use that sensor on almost all of their engines for the major fuel metering calculation. If any air sneaks into the engine that does not go through that sensor, it wont get included in the fuel calculation. You are spraying starting fluid into the throttle body, (which can be a valid test procedure), but you need to have the fresh air tube removed to do that. That means no air is going through your mass air flow sensor and the Engine Computer will match that with the appropriate amount of fuel, which is none.
Adding Heet is not going to do anything. Gasoline today has ethanol in it which is alcohol. If I remember right, Heet is isopropyl alcohol which is different, or some other kind of alcohol, but mold feeds on both of them. That mold can plug the pickup screen in the gas tank that HMAC300 is talking about. That said, I have a 1993 Dodge Dynasty with less than 5,000 miles that regularly sits for three or four years between running the engine, and the same with an 1980 Volare with 45,000 miles. One is fuel injected and one has a carburetor, but both have gas in them that is over five years old. They both run fine on that old gas, but that cannot be said about other blends in other parts of the country. Regardless, I would not be too concerned about nine-month-old gas.
There is my comments of value. Hope that gives you guys something to think about.
Tuesday, July 12th, 2016 AT 9:10 PM