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98 blazer fuel pump?

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Old 12-28-2010, 02:55 PM
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Default 98 blazer fuel pump?

No Start.Pressure 62 psi when pump runs.58 when pump stops.Holds at 58 for 10 min.Have spark.Will run with the aid of carb spray but dies.Security light goes off on dash and all other lights work.All started with dead battery when vehicle sat for a few weeks.Otherwise had been running fine.No codes in system except c0222 for rt. wheel sensor.With gas from vehicle was able to start a small engine So I assume gas hasn't phased out on me.New cap and rotor. Wires fairly recent.What am I missing?
 
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Old 12-28-2010, 08:50 PM
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It definitely sounds like a fuel supply issue. Almost like something is prohibiting the injectors from opening. You could back probe the injector wires and test with a noid light to confirm that theory.
 
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Old 12-31-2010, 07:53 AM
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Default Checked with noid light

Well I checked with a noid light and each injector plug pulsed.Would I be able to check injectors themselves by using pressure gauge.I would build up the pressure then remove fuel pump relay then crank engine and see if pressure drops hence meaning injectors plugged or not?
 
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Old 12-31-2010, 08:59 AM
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Can you access the injector balance test with your scan tool? Gotta be a good scan tool, the cheapies won't access it. If so, that's the easiest way to compare/check injector performance.
 
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Old 12-31-2010, 09:23 AM
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No unfortunately not.But thanks
 
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