Question about Ford Ranger

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Why does my 1995 Ford Ranger 2.3l 5spd backfire and sputter in AM (Not a cold Temp)? 217,000 miles. I maintain oil and proper maintenance. Burns some oil. After I give it some gas it eventually idles smoothly.

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Hello and welcome to Fixya.com
have you run a fuel pressure leak down test? if not you need to do this test, borrow or buy a fuel pressure test gage, they are about $12 at Kragen, the fuel pressure test port is on the top of the engine in the fuel rail that goes over the injectors, looks like a tire valve, hook up the gage and verify you have no leaks, then start the engine and turn if off while watching the fuel pressure, the pressure should not bleed down by more than 5 pounds after engine stops running, if it quickly looses pressure u will need to replace the fuel pump, this is called a leak down test, fuel pressure leak down is the #1 cause of hard starting rough running cold, other things cause it as well like a loose timing belt and worn out plugs and dirty fuel injectors, and worn engine parts, but start with the leak down and then go from there.

Posted on Sep 30, 2010

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