We had a lot of those units in the ADOT fleet. CNG worked good in the 4-cylinder engines that I had in the motor pool, but we had a lot of trouble with the V-6's and V-8's stalling out in the middle of intersections - downright dangerous. The Governor wanted to be politically correct so he had the Governor's Lincoln Town Car converted. After it stalled in the middle of intersections a few times, they just burned regular gas (the public never knew the truth).
We never did get most of them to pass the same emissions test that regular gas vehicles have to pass.
The only good thing about them was they ran on CNG and then switched over to regular gas when the tank went empty, so it would travel a long distance without refueling - but there weren't any other stations away from Phoenix or Tucson so we just ran on regular gas.
Might be okay if you have a 4-cylinder engine; any other engine you should think twice about getting CNG conversion.
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Today's Featured Article - Upgrading an Oliver Super 55 Electrical System - by Dennis Hawkins. My old Oliver Super 55 has been just sitting and rusting for several years now. I really hate to see a good tractor being treated that way, but not being able to start it without a 30 minute point filing ritual every time contributed to its demise. If it would just start when I turn the key, then I would use it more often. In addition to a bad case of old age, most of the tractor's original electrical system was simply too unreliable to keep. The main focus of this page is to show how I upgr
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