P0850 neutral switch code w/ details
Hey All, I haven't logged in in some time. I have an '04 6-speed (one of the earliest models off the line in '03). It has 78k miles, and Mazda America covered install of a reman at 52k. At the same time I paid to have the clutch resurfaced.
3-4 months back I noticed my idle starting out high at 2k, and then settling into ~750. More recently, my idle at lights with the clutch in started getting unstable and dropping down a bit closer to ~600. It didn't choke out, but I cleaned and oiled my K&N intake, cleaned my throttle body and MAF sensor and ran Seafoam through my gas at quarter tank. That seemed to smooth things out for a time, but then the idle at lights got a little unstable--not jumping between 750 and 2k every 5 seconds, but back to holding at 2k at start and then fluctuating between ~600-850. I ran another Seafoam @ 1/4 tank recently, and got a CEL light part way through. I didn't check it immediately since I've been getting the evaporative code a lot from a cheap replacement gas cap. I checked it tonight and it gave me a P0850 code. I read the posts here about that code with insight from Jonathan and ASH8, but I move a lot and don't currently have a set of jack stands. I'll follow up with https://www.rx8club.com/series-i-do-...switch-200453/ In the mean time, I'm wondering if anyone can help me interpret the details of my CEL: Throttle Position: 15.7% Engine Speed: 3448 RPM Barometer Pressure: 29.8 "HG Calc Load: 19.2% MAF: 1.88 LB/M OUT TEMP: 66 DEGF COOLANT: 93 DEGF IAT: 66 DEGF IGN ADF: 31.5 DEG SECOND AIR: Atmospheric ST FTRM11: 0.0% LT FTRM1: 10.2% VEH SPEED: 27 MPH ABS LOAD: 17.3 % FUEL SYS 1: Open-Drive FUEL SYS 2: N/A REL TPS: 4.3% THROT CMD: 6.7% ABS TPS B: 32.6% ACC POS D: 31.8% ACC POS E: 20.4% CAT TEMP11: 1533 DEGF EVAP PURGE: 0.0% CMD EQ RAT: 0.925 CLR DIST: 708 mi CLR TRPS: 136 FUEL LEVEL: 14.9% VPWR: 14.277 V ENG RUN: 01:08 Thanks in advance for any insight. |
P0850 neutral switch code w/ details
1. What are the miles on your plugs/coils?
2. Are you using a k & n filter in the oem air box? Or is your intake aftermarket? 3. Have you checked your intake for any oil or leaks? MAF sensor still good? |
Miles on plugs, coils and wires are 26k.
K&N in oem. Haven't checked intake yet. Will check now and look for leaks/oil. Cleaned and oiled the K&N and cleaned the MAF about 500 miles ago. |
I checked the intake and it's practically as clean and dry as when I last cleaned it.
The only thing I can think might be an issue is that when I last cleaned the MAF, I stripped out the plastic threading on one of the two screws. I locked it down with electrical tape which is still in place seemingly tight. Does anyone have a tip for how to lock this down tighter without having to purchase a replacement? My engine started hunting at idle this morning during a wait in drive-through. My clutch was engaged, and the idle dropped from ~800 to ~500 and almost choked twice. I revved it and it stabilized. Not sure what that means. Thanks for the input. |
P0850 neutral switch code w/ details
Something I forgot to mention is to give your eccentric shaft position sensor a good wipe and reset the NVRAM (20 brake stomp procedure).
Other areas you can check: Neutral switch (broken/ loose wires) Air intake filter Fuel injectors/ pump Or try searching Google using this method site:rx8club.com hunting idle (copy and paste that into Google search bar) |
It ran smooth enough today.
Thanks, I'll try that. |
just have the neutral/idle switch replaced.
I had the same problem and replacing it with a new one was the only solution. |
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