DTMAce's Z26 project - DD usage for the time being - 6-8-12

[3X00-Modified]

I don't think that is true... The vss is a simple magnet hal effect sensor... the cluster is run from the ECU.

BUT if you want to try it, it's on the passenger tail shaft of the trans.

[DTMAce]

I would have to agree with you Jon.

I would think if that sensor was messed up, the gauges would have been acting up no matter if the lights are on or not. However, I will add it to the list of possibles. I have to go for now, will look into the wiring and that later today hopefully.

Still. Does anyone have an idea of which plug at the computer goes to what? It would help me a bunch in trouble shooting this.

[3X00-Modified]

I'll email you a wiring diagram later today

[DTMAce]

Thanks for that Jon!

I may have found something to check that is causing the problem. There is a common ground that ties into both the ignition stuff and the cluster, and its located on a transaxle nut near the exhaust (apparently located along the middle of the engine/trans). Will check that ground later today and see what I find out. Fingers crossed.

[snowblindburd]

So what did you find out?

[3X00-Modified]

Last I spoke with him he was tracing grounds and doing continuity tests on them to see if anything is showing up shy or extra resistance. I haven't heard anything since then. He was also contemplating an ECU swap from the 95.

[DTMAce]

#@#*($(O*)(#(*^&@)_#$

Well, you can't cuss with a damn on here.

Went over several ground points. All good.
Swapped the computer. STILL NO CHANGE!!! I MEAN SERIOUSLY?

Current symptoms:

Turn running lamps on. Both turn signal indicators light up, along with the bright indicator, to tell you the bulbs are missing. (They aren't and they are all working fine, I checked)
It also either freezes the RPM and Speed gauge, or causes them to go bonkers. If you use the turn signals with the lights off and going down the road, it causes the RPM and speed to go bonkers.

It is also running rougher than ever, like its not getting spark all the time. It will die, stumble, run rich, etc.

This all smells of an electrical problem SOMEWHERE, but I be bloody dammed if I can find it. I have been pouring over the diagrams, but not putting it together as to where the problem actually is. Ugh!

Any ideas? Please read through the last couple pages before answering, many things have already been tried.

[3X00-Modified]

Pull the engine harness from the 95 and swap it in... I think there is something hiding within the harness that's causing this issue...

Hell it could be the interior harness as well I have no clue at this point.

This sounds like Geoff's skip he got after stalling that was only solved after he went to OBDII and replaced his entire harness, in and out.

[DTMAce]

I have one word for that.

Ugh.

lol

Sure you don't want to visit? It would only take you what, a few hours? lol

[3X00-Modified]

If I had a few hours to spare I might take you up on that offer but I don't even know when I'll be able to take a crap next... My weekends are packed and I'm stuck at work during the week and I can't take any time off due to being in the middle of a MFG software implantation.

[woody90gtz]

Ummmmm....I'm thinking. I don't know though. It's definitely a problem in a wire somewhere. They can be a real bitch to find though.

[3X00-Modified]

disconnect the alternator and see what happens... Both the plug and the lug wire... just for shits and giggles...

[woody90gtz]

I wonder if a 5v reference wire is screwy. That will skew the reading the ECM sees from multiple sensors even though the sensors are functioning properly.

[Money pit Beretta]

Oh I like that one Woody, there are only few of them, so it would be an easy check.


Just for fun....did you check the fuse panel(fuses and wiring)?

[DTMAce]

If I had a few hours to spare I might take you up on that offer but I don't even know when I'll be able to take a crap next... My weekends are packed and I'm stuck at work during the week and I can't take any time off due to being in the middle of a MFG software implantation.

Well, we have plenty of time to plan that... LOL Maybe I will do the engine swap/harness/transmission rebuild all in the same weekend. Though to be honest, if I'm going to swap the harness, I will probably make the effort and go with one out of a 96, though the 95 harness is right here... Who knows.

Ummmmm....I'm thinking. I don't know though. It's definitely a problem in a wire somewhere. They can be a real bitch to find though.

LOL

disconnect the alternator and see what happens... Both the plug and the lug wire... just for shits and giggles...

I can try that, but not sure what it will prove. It is charging the system good though.

I wonder if a 5v reference wire is screwy. That will skew the reading the ECM sees from multiple sensors even though the sensors are functioning properly.

Where is that wire and what color is it, etc. Would that also affect the gauges like it does when I turn the exterior lights on?

Oh I like that one Woody, there are only few of them, so it would be an easy check.


Just for fun....did you check the fuse panel(fuses and wiring)?

LOL No, I haven't technically. This has been building up, its not like it came on suddenly, if that makes sense, but yeah, I can check those too.