Oh boy well I hope none of those things are the case. This engine in only at 70k. I will try and do a compression test this week then.

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95 Ford Ranger XLT 4.0 4X4 Manual

I have been doing research on my Evap and EGR systems. Could a fault in either of those systems cause a rich condition? Both, if stuck closed, could result in a loss of intake correct? I also have an overheating problem, not in that my truck can't cool itself, but the needle on the gauge often climbs about 3/4 way up, then drops back down, to climb back up again. I doubt any cooling components are at fault, as I have replaced every component except for the radiator. Now, I read that when the EGR directs exhaust gasses into the intake, it has a cooling effect on combustion? I am curious if my cooling and fuel trim problems are linked in a way. Anyways, more updates are coming once I start checking more things.

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95 Ford Ranger XLT 4.0 4X4 Manual

Update:

Today I decided to take the ranger to the mechanic. Glad I did too because this guy was able to look way more in depth to my problem. So far, aside from some janky wiring work I did a while back, his verdict was a faulty ECM.

Here is the labor description, "After testing found fuel trims way off. O2 sensors staying rich. Further testing revealed that ECM pulse width to scan tool reading 3.6ms, using DMM found that pulse width reading at drivers side injectors was 7.6ms()"

He told me this was rare, but according to some database he had, about 20 other rangers of this model had the same exact problem. He explained that my ECM was basically flooding my cylinders with fuel while thinking it was using normal amounts of fuel. I wasn't surprised when he told me that my truck consumed probably a gallon of fuel while idling for 30 minutes. I just ordered a new ECM from oreily's which should be here tomorrow. We will see if this fixes my problem.

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95 Ford Ranger XLT 4.0 4X4 Manual

keep us posted