Newer engines that use DEF have a blue cap on the DEF tank, and most I have ever seen are a plastic tank, not saying for sure that all are though. The new Ford and Chevy diesel pickups are very quiet as well. To help with the emissions, modern diesel engines use a common rail where the fuel pressure last I knew was upwards of 35,000 PSI. Older diesel engines that have an injection pump with a line to each injector separately, give the engine 1 shot of fuel, resulting a a large explosion in the cylinder, causing the classic diesel knock. Now the new engines have all of the high pressure supplied to all of them at the same time through the aforementioned high pressure rail. The computer of the vehicle tells the injector when to open, injecting the fuel into the cylinder. And, last I knew, the tier 4 emission engines were injecting fuel up to 8-10 times per cycle of the engine. Ramping up the amount of delivery as it got closer to TDC, and then ramping back down after that, resulting in many tiny "explosions" in the cylinder, taking the knock out of it and burning the fuel more thoroughly with less "byproduct", or emissions. LOL, there's just a bit of the story , whether you wondered or not
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Today's Featured Article - Show Coverage: Journey to Ankeny - by Cindy Ladage. We left Illinois on the first day of July and headed north and west for Ankeny, Iowa. Minus two kids, we traveled light with only the youngest in tow. As long as a pool was at the end of our destination she was easy to please unlike the other two who have a multitude of requirements to travel with mom and dad. Amana Colonies served as a respite where we ate a family style lunch that sustained us with more food than could reasonably fit into our ample physiques. The show at Ankeny
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