I got a 1997 ranger 2.3 with almost 150k miles. A bunch of new parts installed including alternator, radiator, front shocks, tires, etc. Came with ladder racks and some other goodies I couldn't pass up.
Seemed to be running fine when I checked it out, drove ok, needs rear shocks.
Finally got it registered and drove it around, seems to idle rough only when in drive. Don't notice it when driving, but a stop light you can feel and hear it, it's not terrible, but noticable. I had a vw a few years ago that all of a sudden idled terrible and loss power, etc, turned out to be a coil pack. But I also got a CEL on that. So I don't believe it's a coil pack on my ranger, as the idle isn't that rough and it doesn't seem to have that much of a loss in power.
Only thing that I know that is wrong with the truck are:
- ac does not work at all, blows HOT air.
- exhaust leak, at what seems go be at the connection between the cat and the pipe that goes to the muffler, the connection with the spring. Not sure if that would cause rough idle being after the cat and all.
I have NO code on the ranger. Things I've tried:
- cleaned throttle body (it was FILTHY, worst I've seen)
- cleaned IAC
- cleaned MAF sensor
- seafoam in the gas tank to clean (haven't driven much since I put it in the full tank)
- did a spray check for vacuum leaks, didn't find any
None of this showed any results. Any ideas on what I should try? I don't want to dump money into replacing part after part, blindly fixing a problem. Seeing as the truck cost very little.
Update: fixed the exhaust leak at the connection between the muffler and cat, the spring bolts were rusted and the gasket was messed up. Replaced gasket and bolts (what a pain in the a$$ that was). BUT I found another leak at connection from the header to the cat pipe. A bolt on the flange is totally rotted and not holding anything. Going to bring it to a shop tomorrow, should be a quick repair.
Would a leak before the cat have any effect on the idle and acceleration sputter?
Ok so it's back from the exhaust shop. Turns out there was a hole in the cat (of course the was, every exhaust leak I've ever had always turns into needing a new cat
) so $200 later, a new cat and a new bolt at the flange, it sounds great. It feels a little more powerful, and the idling seems to have improved a little. But there is still a little hesitation/sputter from a stop. Not AS noticable now that there is no leaks to make the exhaust loud, but I can still feel it.
Is that just how these old engines are? Is it because it's a 4banger?
Now that I'm out 2 big ones, it'll probably be next month that I try to replace the wires/coils.