Frustrated with New Install

I just installed a 4 ft firestick on a side mount on my vehicle. When trying to tune on the SWR meter, I'm having trouble. I calibrate both channels 1 & 40 but when I flip the switch on the SWR meter, I can't get any lower than a 6.2. I have the antenna adjustment as low as it will go. Anyone have any suggestions?

13699980_10153760854466453_6795510397281173978_n by dhawkins01 posted Jul 15, 2016 at 9:09 AM

13707514_10153760854681453_240235053278040801_n by dhawkins01 posted Jul 15, 2016 at 9:09 AM

 

I installed this side mount. Two studs through the body to a back plate that is (I assume) grounded to the body. The top stud connects the main lead from the antenna to the radio. There is a nylon bushing between the connector and the body. Then there is a ground connection connecting the cable shield to the bottom stud. There is no nylon bushing on that one so it is directly grounding to the body. I guess there's always the chance the body piece is not actually grounding anywhere, but you'd think it is. The picture of the wiring below is not my actual truck, just pulled it off the web to show how it's wired.

 

I have one, where do I need to check?

 

I finally got around to checking this. I ran an ohm meter between the antenna spring and the battery ground, read about 9.0. I didn't test it from the grounding stud yet as I have to take out the wheel well housing to get to it. Ideas?