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 - Earthmaster Project Progress Just a little update on my Earthmaster......it's back from the dead! I pulled the head, and soaked the stuck valves with mystery oil overnight, re-installed the head, and bingo, the compression returned. But alas, my carb foiled me again, it would fire a second then flood out. After numerous dead ends for a replacement carb, I went to work fixing mine.I soldered new floats on the float arm, they came from an old motorcycle carb, replaced the packing on the throttle shaft with o-rings, cut new ga
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