I just installed my autometer fuel pressure gauge with the isolator but the fuel pressure won't go up. I use the outlet of the fuel tee that came with the ati kit. I check the fluid in the isolator too and top it off. can anyone help?

 

hmm...not sure. Personally, with your ATI kit. I would "T" your fuel line somewhere after your AUX pump...maybe in the engine bay before the fuel rail.

When I do my FPR upgrade, I'm just going to install the fuel pressure guage directly to the FPR. I know...I know...ideally, you want to measure fuel pressure at the rail....but I dont wanna do an mods to the rail...and run lines and cables back.

 

Not good. Your aux pump should be at 80lbs when under heavy boost. You will notice the stock pump will start to loose pressure and once you see that the aux pump should be rising pressure. Maybe the pump isn't making a good connection or your boost line to the dfmu isn't show boost for some reason. I wouldn't boost until the gauge starts showing lots of pressure.

MIKE