[vss dash problems for ej swap]

On 8/16/2019 at 2:26 PM, FerGloyale said:

 

It's not a "safety switch"

It is simply a signal to the ECU, and has ZERO effect on cranking or starting.

Cold start-up the ECU doesn't care whether in "N' or driving, it's all open loop, fixed maps for warm up.

After warm up, it goes closed loop, and that's when it matters for idle. (in combo with VSS)

It never has any effect on cranking.  The "lockout" to keep it from being started while a gear is engaged is from the clutch switch and a relay.

Neutral switch is not part of that system, so it's not a "Safety Switch"

just clarifying. (It's like when people say "Pollution Control Valve" for PCV....ugh.)

Your problem sounds more like VSS with the Rev limit and all.

I pulled codes today and found nothing that would set it into limp mode, but I did read that this neutral could very much be my problem, could someone please help me find this part or a wiring diagram as my 88' gl doesnt have this (99' Impreza 2.2 phase ii engine)

[vss dash problems for ej swap]

27 minutes ago, czny said:

Notice the other hole in back of speedo with one angled & one straight barrier around it?

Maybe Zippy needs to look for a threaded hole connection in there - then bridge that to the nearest screw on pc board with some 16-22 ga wire.

Then ohmmeter test for VSS by slowly spinning the speedo again .

I thought the same thing but there's nothing behind it, I thought it was that too but it is literally an empty hole, no threads or anything, it looks like if there was a different model gauge that whole would be used, but not used on this model, and concerning the diagnostics, I probably messed up the wiring when putting it in the GL 

[vss dash problems for ej swap]

10 hours ago, alexbuoy said:

Is it still idling low? My brat did the same thing after startup it would run great then couple minutes later it would miss and barely rev. Turned out to be a fuel problem. 

Looks like your VSS is hooked correctly i did the same thing in my 91 loyale iirc. Good ground? 

Whats your fuel line situation looking like? Is evap line to vent or to original line.

Im thinking it’s more of a fuel related problem. I also wouldn’t trust an ej na-t with a stock EA FI fuel pump.

It's a walboro 255, and its ran at 60psi, like i said it runs perfect before limp mode, I would assume a nuetral safety switch would have terrible idling problems straight as you start the car... Literally the car starts, idles fine, car warms up, idle goes down, drives at full power for about 5minutes and then idle is reduced to like 200-500rpm and max rpm is limited to 4k tops, it doesnt hit a ceiling but it sounds like a rev limit... Havent had time to try the gauge to see if it worked but im pretty certain it is the problem so it's not fuel related, and the ecu is from a manual impreza, even if you rev it when you first start it up it will rev all the way to 5500rpm, but after the "limp mode" described, it revs hard up to 3k and then kinda breaks up as if its not running on all cylinders

[vss dash problems for ej swap]

15 minutes ago, l75eya said:

No speed signal will cut you at 4k is that what's happening? 

Yeah, I read on multiple forums that the ej phase ii goes into limp mode under two conditions, the knock sensor and the speed signal, Im pretty sure older ej's dont have this problem

 

[vss dash problems for ej swap]

3 hours ago, FerGloyale said:

seriously, that screw missing near the bottom right corner of the VSS unit looks like it is the contact to the trace sheet that corresponds to that pin with the Yellow/red wire.

I'm pretty sure this was the fix, if I take the screw out and measure resistance while spinning the speedo there is no change... But with the screw in there is a change in resistance, still no voltage but something is different, does this mean it is working?? 

[vss dash problems for ej swap]

I'll see if i can find a screw to fit and retry it, UPDATE, that screw was connected to the red yellow, but it still doesnt generate any measurable current with a multi meter, will it work regardless??

 

 

[vss dash problems for ej swap]

There is something wrong with the harness and the codes won't read, so that's another big problem, but it ran fine in the impreza, and it ran fine n/a in the GL, except for the limp mode 

[vss dash problems for ej swap]

Im still using the stock ecu, it also did the same naturally aspirated so I dont think it's turbo related, and I did connect the red/yellow to the speed signal wire to the ecu and nothing changed, it will run fine for about 5 minutes and then it has incredibly low idle (around 400 rpm) and revs out to only 4k

[vss dash problems for ej swap]

Well if you have any info about it, I would greatly appreciate it, but I haven't seen any of the wiring diagrams that look like this dash, I always find the older ones like 83,84 and such

[vss dash problems for ej swap]

Ok so the cluster isn't the problem, but which wires do I use for the vss signal then because I hooked it to a multi meter with many different wire combos, and everybody has said to use the yellow/red and black, but the multimeter didnt change in resistance nor did it change in voltage, and it isn't boost cut because it did it before when i drove it n/a

 

[vss dash problems for ej swap]

Ok so some back story, I have searched the webs and many forums for this problem, I have a 1988 subaru gl with a ej22 phase 2 engine in it from a 99 impreza. I then turbo'd it and it runs fantastic at 8 pounds of boost, UNTIL, limp mode happens. Now I have gotten a dash cluster which I think is compatible but it's from an 87 DL auto, which i thought had the reed switch thing I needed for the impreza's ecu to be happy, apparently not. So my question is what am I doing wrong, is the cluster not compatible or is it simply im not wiring it right, because a lot of people say to use the cruise control, but i have no longer  have the cruise control and/or wiring thinking I wasn't going to use an oem style speedo. Please help, even though it's probably been answered many times