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Pontiac Forum: '93 3800 Transport slow starting
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  #1  
Old March 16th, 2014, 05:10 PM
TourNut TourNut is offline
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'93 3800 Transport slow starting

The battery is easily turning over the 3800 engine but the last couple weeks , it has been taking longer & longer for it to "catch/start". Up to then , it always started within a second. ( 193K miles ) Runs fine on the highway so far.
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Old March 17th, 2014, 10:36 AM
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melsg5 melsg5 is offline
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what is the maintenance history of the engine, when did you last change plugs, air filter, fuel filter, etc?
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Old March 17th, 2014, 12:16 PM
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Thanks. A couple other forums both think it is a weakening Fuel Pressure Regulator so I've ordered one from NAPA (Echlin: 3 yr warranty )$129. + a fuel filter.
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Old March 17th, 2014, 12:57 PM
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did you do a fuel pressure test before ordering parts?
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Old March 24th, 2014, 09:22 PM
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I don't have a pressure tester , that is more expense, but I replaced the fuel pressure regulator - that was the problem. I also replaced the fuel filter - it was so rusty that the hose nipple broke off as I was pulling it out of the "quick connector". Great place for a fuel filter , where the wheel throws salt on it !
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Old March 25th, 2014, 10:29 AM
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glad you got it solved, some auto parts stores rent the tester.
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Old March 25th, 2014, 09:03 PM
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In my long career as an auto tech, a failing fuel pressure regulator has fixed a slow start problem maybe one time, on GM vehicles. Usually the problem is a failing fuel pump, if it turned out to be a fuel related issue. One other time it was a partially clogged fuel filter. The other 200 times was the fuel pump. Just some info, for others.
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Old March 30th, 2014, 07:09 PM
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The fuel pump failed years ago , and got replaced.
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