| What codes are you throwing? Need to know what kind of limp to help you out.
Problem with a race valve is not when commanding rail pressure, the problem is when you are commanding 26,000psi under WOT then you have to lift the throttle. The rail pressure spikes to very high levels, 30,000+. The FPRV will open at this time relieving the pressure, the race valve will not.
With a weak FPRV, the engine limp occurs after WOT when the throttle is released. A shim will stop this problem, but still allow pressure relief at insane levels of rail pressure. |