[first/thridgen]

I installed 2 new check valves today and replaced the solinoid valve.

It idle rough, the check would not hold its cracking pressure let alone vacum. I could feel the vacum leak with the line off at idle with my finger.

I removed the faulty check and "streched' the spring.

This stopped the fuel being drawn in at idle.

My concern is I have one untouch check and another with a uknown spring pressure. Since these checks are on seperate throttle blades I am concern about unequal flow.

Is there a spring length measurement that you can give me?

Also the gauge goes to 0 showing now residual line pressure, is this a problem?

When I used a solinoid valve it would mantain pressure over night.

[dvldoc]

The spring pressure is only 22psi, which will bleed back into the pumps head after a while, which hold several ounces of fluid on the out side. There is normally no fluid after the check valve or a soleniod. Solenoids hold the pressure at just about the pumps output pressure which can cause increased wear.

[first/thridgen]

Both check valves are leaking now. The untouched one and the one with the stretched spring. I verified this with a vacum gauge - both drawing threw the check at high vaccum.

I need this repaired as soon as possible as it is my daily driver and I am using 3 gallons of meth/water on the way to work and back without getting on the throttle.

Is there a problem with this new style valve?

As I would dought that I could get 2 defects at once.

[Rocket468]

Not, sure. Probley should send them back so we can take a look. See whats going on. Which ones are they. Tube in tube out. or threaded on both ends or thread 1 end tube other?

[first/thridgen]

Both ends have 1/8" male pipe thread.

I have restretch both springs and holding 25psi right now.

I will see how this will work and relay the info back at a later date as I am unable to run with out the system.

If there is a problem I would have to say it has loss of spring pressure over several cycles. As well as new springs having incorrect tension or length variations.

[first/thridgen]

There is a problem with the check valves that I have.

I finished off the season last year using a old nitrous solinoid and some hose. (alot of lag time with this due to the amount of hose after the valve - working check valves woud be perfered)

I recently revisited the check valves with a vacum gauge/pump. Will not hold a vacum.

I notice when first installed and working well with the nozzle plate removed there was good patern but alot of chatter out of the valves when the pump was cycled.

After a week of operation the flow perfered one side, unequal cracking pressure -> then a vacum leak to supply tank.

It may be due to having 2 checkvalves in parellel with each other I am not sure, I will be very surprised new valves will last any time at all. This chatter is like putting several hundred cycles on a minute and may weaking the spring. Is it a problem with my set up?

Is there any other dual nozzel behind the throttle valve set up working with some miles on it?

I will go with a single nozzle behind throttle blade if the check valve will function correctly, but I need to now before I go drilling a hole in my manifold. I do not have enough clearance to run a solinoid in the desired locations other wise there would be pair already installed.

[dvldoc]

Do not run the check valves in parallel with each other, If your running two nozzles use a y fitting to split them and run a single inline check valve.