F-150 GFI CNG questions/help

[jpenhead]

I just bought a 2001 CNG/Gas F-150. The dealership (Honda) didn't even know it was CNG, they sold it listed as a duel tank- It has the "N" on the title in the fuel block. No CNG sticker on the back but you would think they check this kind of stuff.

The problem... When I switch to alt fuel I get no indication. I did some checking under the hood and found a blown 5A fuse by the battery. I replaced the fuse. When I started the truck the RPM's went up about 200, that remains constant until I remove the fuse or turn the truck off. When I turn it back on the idle is normal, if I remove the fuse and put it back in the idle increases. The fuse isn't blowing, at least not yet.

I know almost nothing about CNG other than it makes sense. I am mechanically inclined but have never worked on these systems. Some of the questions I have:
How do I know if my tank is empty, short of finding a purge valve?
Where can I find wiring/installation documents?
Does anyone recommend a repair center in San Diego?
Do I qualify for any of the "tax breaks" being that the vehicle is used?

Any help and/or starting points are appreciated.

[jblue]

Re: F-150 GFI CNG questions/help

Any help and/or starting points are appreciated.

First, you need to see if the OBD computer is generating any codes. Based upon those, you can begin to troubleshooting.

[OhMyGas]

Re: F-150 GFI CNG questions/help

If the title shows an 'N', you have a very good chance in getting the HOV sticker. Once you applied it will take at least 2 months. At least that long I waited when I applied for my Bi-Fueled F150, which also had an 'N' in the MP section.
Sorry cannot help you with the technical issues.