heyhar

That makes good sense. My '92 Cherokee 4.0 uses a MAP sensor, and I've never touched it. I certainly will look into the knock sensor.

I removed the MAP sensor, and shot out the little probe tube with MAF sensor cleaner. I was on the way to the junkyard, to grab a few more MAPs, and the car reacted well. Well enough that I turned around, came home, put it into the garage, and gave it a real good soaking. I'm going to disco the battery, let it sit a while, and maybe it will relearn some new manners. Thanks for the tip!

The battery had been disco'd recently, no change in problem. No noticeable driveline issues, strictly, as best I can figure out, an air/fuel issue. As was noted earlier in this thread, a lazy/malfunctioning MAP sensor could indeed result in better MPGs, as it trims fuel to match what it believes to be a lighter load. I'm leaning in that direction..... Throttle body/IAC was cleaned not too long ago, and it was surprisingly clean. Idle is fine, good feel and speed. The problem was most noticeable in second and third gear, but recently I felt it in fourth/lockup on the interstate, at 70 MPH. As it turns out, no MAF, so, upon suggestion, I'm looking at the MAP sensor. It's probably due anyway.

New user? I've been here since 2010. I needed to reset my password, and now I'm new? I wish it were that easy for everything else....

Yeah, time to head to the yard. Eight bucks a pop tastes better than 60-80 bucks. Thanks...

The problem started over a year ago. It was my wife's daily driver since new, and when she got a '16 Leggy, I inherited it. She noticed it right away. Through the years, I've done all the maintenance and repairs, except the head gaskets. MLS Fel-Pros, hope they last. Just about all I've listed was done before I started chasing the problem, on an as-needed basis. The car just turned 165k miles, so I guess the MAP sensor could be tired. I'm happy to grab a few from the junk yard, but how can I test them? There's plenty of this gen Outback/Leggys there, but they're all just as old, and with the digital odo readout, you can't tell the miles without a battery. I shot some MAF cleaner up the tube of my MAP sensor, so I'll try it out, but I may have to bite the bullet and get a new one. Thanks for the quick reply!

My '04 OBW, 2.5, has an annoying 'stuttering' upon acceleration. Ruled out the EGR valve, felt like it was overactive, but, disconnected, it makes no difference. A Google search led to various Youtube videos, most pointing at Mass Airflow Sensor problems. But I've come to realize that my car has no MAF sensor, relying on a MAP sensor. Can this be the cause? Can it be cleaned? The car shows no CEL codes, clean air filter, recent plugs, wires, dealer OEM coil, recent cats, car otherwise runs and shifts good, just the annoying stuttering/lack of normal feel. Still getting excellent MPGs, checked at every fill-up. Any suggestions?