Fuel pressure regulator
10-10-2006, 06:34 AM
#1
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Fuel pressure regulator I know the VATS cuts fuel but, how? Does it shut the injectors of or does it drop the pressure by opening the fpr? A friends 2002 SS doesn´t start but when he blocked the return w/ his finger I could start the car, so the fpr is not holding pressure but the question is why. Is it because of a malfunction or VATS?
10-13-2006, 04:11 AM
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Well there is a T fittings downstreem the fuel filter and you can disconnect the return line and put your finger over the hole. However you risk spraying yourself with fuel. Anyhow we found the problem, we took the tank down and the fuel pump was broken and was failing to supply enough for the fpr to maintane pressure.
10-13-2006, 09:45 AM
#4
ahh ok...makes sense now.I thought you were working at the fuel rail.By the way if vats is stopping it from starting you would have a no crank condition because it disables the starting relay AND doesn't send the square wave form to the pcm to enable the fuel injectors.Normally to test the fuel system you would use a fuel pressure gauge at the rail.You guyz used the backyard finger method.