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Okay this happened twice on very hot and humid days.Firsdt time car driven probably 11 miles and noticed running a little rough went into store came out and wouldnt fire over sounded like it was trying.After an hour it started but had it towed home anyway. Replaced coil pack.
Two weeks later on another hot and humid day same exact trip to store and this time come out of store and wont start again same issue like a stumbling trying to turn it over but it didnt stumble on way to store .Had it towed home again. While at store checked to hear fuel pump nothing heard ,checked fuse and relay .After it got home which was probably an hour and a half it started back .
Parked it till I get an idea of whats wrong. Thinking Fuel pump ? Got a price of #350 to 500 to do the job does that sound reasonable.
Any ideas to confirm problem would be appreciated.
Paul:(
 

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What year? If its pre 2000, use a fuel pressure gauge to check pressure. Turn key to run / off / run a few times and see if pressure quickly builds to 30 or so psi. 2000+ use a scan tool and monitor the fuel pressure PID and look for the same thing.
 

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pressure will vary from different years. a good auto parts store will tell you what the pressure should be for your year. as far as the price. thats about the norm for a fuel pump parts and labor. as long as they are replacing the pump, hanger and filter.
 

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All Taurus / Sable 86-07 (with the possible exception of the 2.5 HSC) use a base fuel pressure of 39 psi. With the return style system, this is checked with the vac line OFF the regulator, using a fuel pressure gauge. With the return type system, this is checked with a scan tool and the vac line connected to the regulator. Engine running in either case.
 
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