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The '02 manual does not spec an idle speed in gear, but in park or neutral, it wants to see 750 +/- 50 if the aircon's off, 825+ if it's on. Sounds like yours is working. Every auto I've driven idles a little lower in gear, so while I don't have a spec for that, I'm inclined to call it normal. Turning on electrical loads or working the steering loads the engine, so it makes sense it's dipping a little more under those conditions. The vibration/stumbling under load, while it's still pretty close to its target RPM, makes me suspect a mixture issue. MrElCocko may be on the right track with the MAF sensor. Yours sounds a bit like how my '93 behaved when the MAF sensor connector was worn out. Sometimes it would idle low at lights, sometimes it would surge, sometimes it would stall completely unless I shifted to neutral or drove with both feet. Wiggling the connector would clear it up for a while. Finally I got around to replacing the connector, and haven't had a problem since. I don't know if the R50 suffers from the same issue, but I would check that the plug feels tight and the sensor is clean. If that checks out, check for cracks in the boot between the MAF and the throttle body, and check for vacuum leaks. Might be worth throwing some fuel system cleaner in the tank in case one or more injectors are a little gunked up. One or two cylinders firing poorly or not at all could explain why it's vibrating so much, though I wouldn't expect that to only act up at low RPM, and I would expect it to throw misfire codes if it was that bad. Probably wouldn't hurt to clean the idle controls, maybe check for signs of the coolant leak those get, but again, it sounds like that system is doing its job. If your throttle body isn't the fussy electric one, maybe give that a clean, on the off chance.

I cleaned mine a few times in the past before this started happening. I'll try cleaning it again over the weekend to see if it changes anything. Chris.

Maybe clean your MAF sensor.

My 2001 R50 Pathfinder 4X4 Manual, recently started doing the same thing. It's almost like it's about to stall when I'm stopped at a red light in neutral, it does this about 3-5 seconds after coming to a stop but it seems a bit intermittent in my case, anyway. Chris.

Update to this age-old post: turns out it was a malfunctioning Pulse Air Valve (goes by a couple of different names, but the part number is 22660-5210V). It was kind of a weird replacement, because it met all test procedures - just kind of stumbled upon it while running some other tests: According to manuals, you are to measure the resistance of the two pins and if it is between 70-80ohms and as long as it checks out, you move on to diag'ing the harness etc. Apparently my solenoid was still functioning (I think it was around 72-73ohms) but something was causing the valve to not close as much as it should (possible worn internal spring?), thereby sucking in a bunch of unwarranted air. This was accompanied by a strange "air surging" sound coming from the intake - almost sounded like a dang vacuum at the air filter. I diag'd it by removing the two 10mm bolts and plugging both the intake plenum hole and also the valve itself. The "vacuum sucking" sound stopped at the intake and the idle mellowed out. Anyway: if anyone has this bizarre issue, and the intake sounds like a vacuum or 'surging/sucking' sound, it pays to firstly unplug your IACV (easy test - if your idle drops, you know it's okay), then check that pulse air valve/air regulator. Especially if you can find no other exterior, other vacuum leaks in any of the other hoses/tubes. hope this helps someone.

You’re crazy on that water crossing Sent from my iPhone using Tapatalk

More OHV fun on a day off

Some action shots I received from my neighbor when we had our snow storm back in January Sent from my SM-G960U using Tapatalk

about time i got to go fishing with friends Sent from my iPhone using Tapatalk

Not to be argumentative, but simply to point out there’s differences in taste, I like the amber corners. In fact, I intend to put more amber on my truck (Raptor mod & maybe front & back running lights on rack). Unless you’re murdering out your truck (as above), I don’t get the clear corners. Honestly, I don’t even get it much in cars. It’s a European thing, not really a Japanese, Australian or American thing. In fact, some places put extra amber lights on the sides of the front fenders (secretly, I kind of like it because it reminds me of my Z). I also kind of like the bright amber running lights in Toyotas. That said, truly to each their own. I may just need to start an Amber Support Group (Oh, maybe Amber Anonymous), I’m starting to realize I might actually have a problem. I don’t dislike the clears in trucks, it’s just not for me. Also, I get that it’s an easy mod to do to just do something and I’ve certainly made changes for that reason alone too.