I just bought a 94 ranger with the 4.0l engine 5 speed. It has new fuel filter, plugs, and wire. Just did a injector cleaning service and throttle body cleaning service.

The problem is at idle there is a slight misfire you can feel and hear from the exhaust. Also when accelerating, the truck wants to hesitate. This problem was before the cleaning services. Previous owner put new plugs and wires on.

When you press the gas down more it then catches itself and you can feel all the power return. I'm at a dead end right now. Wondering if there are some common problems or common fixes for this problem.

Thanks in advance!

Make sure you have the right plugs.

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Make sure to clean the Mass AirFlow Sensor also. Sounds like the culprit to me. I had the same issue with mine. Ya need a set of security torque bits and some no residue cleaner (I used some brake cleaner once and some QC electronics cleaner the next, both seemed to work). The easiest way I found my issue was to unplug the MAF and then the truck idled and ran just fine but threw a code. Cleaned it and plugged back in and had no code and ran good again.

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94 Ranger, 4x4, Supercab, 5 Speed, 4.0 engine, 3.73 gears, 8.8 limited slip rearend, pacer wheels