I have a 95 ford ranger 2.3 ac and powersteering not installed(factory). I have owned the truck since 2004. In the last year I have cleaned the k&n air flilter, changed plugs and wires, fuel filter and cleaned the throttle body. Then it sat after that for a few months. Recently i seafoamed it thought the vacuum line from the brake booster and poured a can in the gas tank. Then it started running rough and backfiring with no check engine light. What I have checked so far is oil level which is good. Cleaned the maf sensor. Took the egr off the the intake couldn't get the tube from the exhaust to intake manifold off but looked the best i could and hit what i could with some carb cleaner. Another new fuel filter (helped a little bit with rough idle no improvement with back fire). Checked to spark plugs they were all clean(not fouled) but the #2 intake side spark plug would not go back in with out some persuasion. Threads wouldn't grab had to put some pressure on it to get it to go. I tried two different plugs so thinking not the plug threads but the ones on the block. Looking for somethoughts. My next guess is low compression cylinder 2 but haven't got a chance to test that theory out yet. Still no check engine light.
Thanks for you help
Pat
Thanks for you help
Pat