Is this a fuel pressure problem?
08-20-2007, 11:10 AM
#11
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Always good to measure the problem and confirm root cause before buying parts. Personally I wouldn't buy a pump until you confirmed your fuel pressure is out of spec when the problem is occuring. Pressure may drop off due to volume which points to a fuel pump issue (assuming no leaks from pump to fuel rail, injectors, etc.). If it is a failed regulator, when you restrict the return line you'll see the pressure increase to the pumps max potential which should be at least a few psi higher than spec. What is the fuel pressure specs with and w/o vacuum hose attached?
08-20-2007, 11:17 PM
#12
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Always good to measure the problem and confirm root cause before buying parts. Personally I wouldn't buy a pump until you confirmed your fuel pressure is out of spec when the problem is occuring. Pressure may drop off due to volume which points to a fuel pump issue (assuming no leaks from pump to fuel rail, injectors, etc.). If it is a failed regulator, when you restrict the return line you'll see the pressure increase to the pumps max potential which should be at least a few psi higher than spec. What is the fuel pressure specs with and w/o vacuum hose attached?
