Rough idle missing cylinder
97 Ranger 2wd. 4cyl with 8 plugs 5 spd 190,000 miles.
Hi. sorry for the short story lol. just want to get all the info i can out.
so I've posted once before a few days ago. My Ranger has been running really rough.
I mentioned that a week ago I changed the oil and ever since then it ran rough. I started it up and went to the store and it wanted to die at every light. I went home and let it sit and the next day I started it up and let it warm up and revved it in neutral in the driveway and as soon as i let off the gas it died. I didn't know what was going on so I took it to a shop and had them scan it. It's missing on a cylinder, They wanted to do a complete tuneup and check the compression and change filters and plugs and wires. We don't have a lot of money so I took the truck home to think about it. I decided to change the plugs and wires myself and that didn't fix the problem. I then looked online for help. I cleaned the Maf sensor and the dpfe sensor and the IAC sensor. I checked the IAT. in my year and engine the MAf is housed completely inside the air cleaner assembly and the IAT is in the assembly as well closer to the throttle body.
I had heard mixed advice about the PCV valve. some say it should be checked and some say it rarely goes bad. I'm not sure where it is....i think i see it, but don't know how to get at it.
have not checked the EGR valve yet.
But with missing a cylinder, I am not so sure that sensors could cause that could it?
I really thought I had something fixed as soon as I pulled all the plugs. The last 2 that are hidden behind manifold on the DS were in such bad shape that I figured I had easily fixed the problem.