jrowell
NAXJA Forum User
- Location
- Bakersfield
Little Back story first (soory this is long) ... 87 xj. My tank was dented in from wheeling (and would only hold about 10 gallons) so I got a new one from the salvage yard. Before I put it in I dod the tank mod where you raise the Air outlet thingy-ma-do so you can get more fuel in the tank. I then put the stock fuel pump in and everything was good. It fills a little slow, but I'm able to get over 20 gallons in.
On to my problem: on the first trail run, the pump started making a loud buzzing sound. Like it was vibrating against metal. I believed that the pump was damaged in the dented tank making it's foot not "seat" in the tank. I bought a new pump and installed it being careful to get it to seat properly. Just took it on it's first run today. Drove it about 20 miles to the trailhead no problem. After about 1/2 hour of wheeling it starts making the same buzzing sound. It's pretty loud and exactly like the stock one. The pitch does not change with throttle. Stopped for a break and turned it off. Turned the key back on... and no sound. After about 10 minutes started it back up and it sounds normal. After about an hour of wheeling it starts again. I drive it about 1/2 hour more till lunch and shut it off. After lunch start it up and all is good again. Doesn't make a sound for the rest of the day (about 2 hours of wheeling)
I tried removing the fuel cap while it was buzzing thinking maybe it was not venting or something. No "swoosh" when the cap came off and no change to the pump sound. I pulled the filter and blew through it and it seemed like it wasn't plugged. I'm kinda stumped on this. Is something with the fuel tank mod I did screwing up the pump?
Any theories would be greatly appreciated!
On to my problem: on the first trail run, the pump started making a loud buzzing sound. Like it was vibrating against metal. I believed that the pump was damaged in the dented tank making it's foot not "seat" in the tank. I bought a new pump and installed it being careful to get it to seat properly. Just took it on it's first run today. Drove it about 20 miles to the trailhead no problem. After about 1/2 hour of wheeling it starts making the same buzzing sound. It's pretty loud and exactly like the stock one. The pitch does not change with throttle. Stopped for a break and turned it off. Turned the key back on... and no sound. After about 10 minutes started it back up and it sounds normal. After about an hour of wheeling it starts again. I drive it about 1/2 hour more till lunch and shut it off. After lunch start it up and all is good again. Doesn't make a sound for the rest of the day (about 2 hours of wheeling)
I tried removing the fuel cap while it was buzzing thinking maybe it was not venting or something. No "swoosh" when the cap came off and no change to the pump sound. I pulled the filter and blew through it and it seemed like it wasn't plugged. I'm kinda stumped on this. Is something with the fuel tank mod I did screwing up the pump?
Any theories would be greatly appreciated!