I got a '97 Crown Vic with a Police Department done CNG bi-fuel after market kit. It has 111,000 miles on it. It is kind of rough. I've noticed two things:
1) It's positively worse at high temperatures and humidities.
2) I could swear it's worse when I fill from one station.
It stalls out at lights. You drive up on CNG. (Sometimes crawl up is closer.) Then you stop. Boom, dead. You can re-start. If you try you can manage to switch to gasoline before stopping fully and idle on it at the light, then switch back when you're going.
When it's on straight CNG, there are times that it is hard to get to fifteen miles an hour. It's miserable!
Thanks.
Pentium
1) It's positively worse at high temperatures and humidities.
2) I could swear it's worse when I fill from one station.
It stalls out at lights. You drive up on CNG. (Sometimes crawl up is closer.) Then you stop. Boom, dead. You can re-start. If you try you can manage to switch to gasoline before stopping fully and idle on it at the light, then switch back when you're going.
When it's on straight CNG, there are times that it is hard to get to fifteen miles an hour. It's miserable!
Thanks.
Pentium
Comment