Question about 1993 Ford Ranger SuperCab

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My tuck idles low and spits gas out the exhaust

My 1993 ford ranger when i start it it will idle at 1 rpm and its rough and then it drops to 500 rpm and it sound rougherand then there gas spitting out of the exhaust and i am gettin terrible gas milage i have changed spark plugs the throttle sensor the fuel filter the iac sensor the mac sensor and the fuel injector pressure regulator and it still runs bad wat do i do i really need help and it not doing this cause the enigine needs to warm up

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Since you have replaced all those parts already, I would suggest checking out the egr valve. Also I was wondering how the coilpacks or distributor are acting? Is the truck firing on all cylinders? Very possible you have leaky injector also.

Posted on May 15, 2009

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1 Answer

My truck idling low and spitting gas out exhaust


Hello Charles...I don't know what engine package you have in your ranger the 3.0 or 4.0 litre, but regardless, a diagnostic scan needs to be performed to determine the cause of the problems. Sounds like the Electronic Engine Control (EEC-IV) has stored hard codes. A self test can be performed where Diagnostic Trouble Codes (DTCs) are transmitted on the Self Test Output (STO) wire located on the vehicle self test connector. The codes are in the form of timed pulses, and are read by the technician on a scan tool or the CHECK ENGINE light. With the information recieved the proper repairs needed to correct the problem can be determined, other wise you are just guessing.
Good Luck...i hope this helps and will fixya up.

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I know that you did not mention any overheating but have the cooling system checked for hydrocarbons or do a compression test (all cyls should be within 20% of each other. Even if you had one completely dead cylinder, it is very difficult for wet fuel to get through an exhaust system without vaporizing. Your symtoms sound very much like a partially failed head gasket.
I could be wrong, but without the benefit of being there, that's what it sounds like.

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You replace alot of things but you should replace the EGR valve and the throttle positioning valve also. I would start with the EGR valve

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First confirm it is either gas or eastter. Wayer/condedste collects at the tail oip as a byproduct of the caralyctic converter on cold rngine It normally occurs on firts start of a cokd enginw. the ebgine idles low because it is col, but should reyutn to normsl after warm uo.. If for sure iys gasolinem and the engine runs eiygh, then angihector is bad, good luck. I hope this helped yyou

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