intake, exhaust, kn filter, its tuned by super module
hid lights, hella horn. it runs fine no problem and very clean ride, it just this reduce power happened before and it went on its own and now its back again

and that fuel issue thing and that's it

 

Start by pulling your "super module".

 

i can’t the ecm is tuned but Supermodulation. It’s a website that you send your ecm and they tune it and send it back

 

[QUOTE=NFS;359198]I'm not sure about our H3's but newer vehicles have a 'roll over' safety (check valve?) to keep fuel from spilling in a roll over accident. Possibly that check valve is stuck open and is not shutting off when tank is full? Just throwing out ideas here.

 

[QUOTE=Broken Halo;359221][QUOTE=NFS;359198]

I'm not sure about our H3's but newer vehicles have a 'roll over' safety (check valve?) to keep fuel from spilling in a roll over accident. Possibly that check valve is stuck open and is not shutting off when tank is full? Just throwing out ideas here.[/QUOTE

yes I am confused too. I am gonna push air with air compressor on the other hose that vent to the tank or run something into it maybe something there... I am willing to try everything. If this came clean and didn’t fix the problem then my only last Option is to change the filler neck.... unless someone else got another idea...

 

Be careful, which direction you blow compressed air. You may cause more problems than you have, now.
Too much pressure at a valve could break it, and block the passage it's trying to regulate, or leave it wide
open and not close off the passage when it's supposed to.

That being said, Hummerz is right on the mark. Your alternator is putting out too much voltage.
Just because it's new/rebuilt doesn't mean it can't be defective.
Trust me, 23 years in the automotive parts industry, at a reputable parts company, I know a thing or two.

Good luck.

 

When I unplug the vent hose from the tank . No issue , when I plug it back on then when I refuel it spits out. I tried compress air toward the tank and I can see air coming back so it’s not blocked so I am not sure

 

How do you see air? Where did you blow the air? Note 10 & 11 is the vent:

 

I blew air in number 10 when you unplug that hose that connect to the tank, I blew air toward the tank from that hose and I can feel air coming back

 

You disconnected the vent, so the problem is between 10 & 11. Did you disconnect 10 at all connections and blow air through it?