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scorge

scorge 3/21/2010

1998 Ford Mustang SVT Cobra 8 Cyl 4.6L

Engine

I have hesitation when i hit the gas, whats the problem?

the following has been replaced, MAF sensor, fuel pressure regulator, plugs and wires, fuel filter, and fuel pump

4 Answers


HouseCallAuto

HouseCallAuto 3/21/2010

Have you checked for fault codes? You have covered the main causes of hesitation with the parts you replaced. I would still check fuel pressure to verify that it is within spec. Perform the fuel pressure and leakdown test. The fuel pressure specs is 30-35 psi at idle and should increase to 40-45 psi with the vacuum hose removed from the fuel pressure regulator. The fuel pressure should hold pressure.

Kevin - HouseCall Auto Mechanics

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jonzip411

jonzip411 3/24/2010

i think i had the same issue you are describing and i replaced the camshaft Synchronizer and sensor that goes with it. can you describe the issue in more detail so i can see if was just like mine?

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jonzip411

jonzip411 3/24/2010

i think i had the same issue you are describing and i replaced the camshaft Synchronizer and sensor that goes with it. can you describe the issue in more detail so i can see if was just like mine?

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HouseCallAuto

HouseCallAuto 3/26/2010

Good suggestion by jonzip411, I agree it is a strong possibility.

Kevin

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