Posted by Goose on July 29, 2017 at 19:44:54 from (70.198.53.74):
I'm stumped. Yesterday, with my wife driving, we pulled up to our mailbox in her '07 Chrysler T&C. While I was reaching into the mailbox for the mail, it sounded like a motorcycle went past on the road. We both looked around and there was no motorcycle on the road. We realized the noise had come from the rear of the van.
It did it twice today, both times after we'd come off the open road and stopped with the engine idling. You'd swear someone was revving a big Harley behind the van. Again, it never lasted more than 5-10 seconds. My first thought was something loose and rattling in the muffler, but it was to steady a pulsing sound for that. The only other thing I can think of is an injector sticking and the exhaust stroke pushing raw gasoline into the exhaust system where it ignites. The pulsing sound is just about the right frequency for one cylinder of an idling engine.
I've been into vehicles since I was 12, and I swear I've never heard anything like it, even when I was in service management.
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Today's Featured Article - Listening to Your Tractor - by Curtis Von Fange. Years ago there was a TV show about a talking car. Unless you are from another planet, physically or otherwise, I don’t think our internal combustion buddies will talk and tell us their problems. But, on the other hand, there is a secret language that our mechanical companions readily do speak. It is an interesting form of communication that involves all the senses of the listener. In this series we are going to investigate and learn the basic rudimentary skills of understanding this lingo.
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