fuel pressure adjustment, dont have a guage Options

[nycchef]

need to adjust the fuel pressure (was 34 psi at the fuel rail) but don't have a meter should i try it without one and if so what should i look. for engine idle is high (1800rpm) and car tops out at 4000 rpm when driving .is this the fix? already changed cht sensor and vacuum hoses

[drewvw]

I just built my own for 20 bucks. Go to home depot, buy one of the water pressure guages they sell that you can screw onto faucets and such. Next, walk down the aisle and get a couple brass reduction fittings that will screw in and you end up with a nipple the size of fuel line.

Go to auto parts store and buy some fuel line and clamps that will fit onto that nipple on the drivers side. Get enough fuel line so you can rest the guage on the rear lid. Clamp everything thing down and make sure all fittings are wicked tight and sealed. Maybe put some of that tape on the threads. You cant have any leaking gas.


unscrew the plug on the drive side fuel rail and clamp down the fuel line on there. Do this when the car is cold so theres no pressure in the system.

Fire her up and see what the guage says. regulator is right there so once you have the guarge working well its pretty easy to adjust.

Do not drive around with the gauge on...not designed for gas, too dangerous.