Wynona the wagon's resurrection!

User avatar
DRIVEN
Posts: 6497
Joined: Thu Jun 27, 2013 7:05 pm
Location: I've been everywhere
Has thanked: 397 times
Been thanked: 204 times

Re: Wynona the wagon's resurrection!

#681

Post by DRIVEN » Mon Aug 26, 2019 7:06 pm

Got injector pulse on all 6?
When the only tool you have is a hammer every problem starts to look like a hippy.

User avatar
HRH
Posts: 828
Joined: Sat Jan 18, 2014 8:54 pm
Cars: Lots
Been thanked: 75 times

Re: Wynona the wagon's resurrection!

#682

Post by HRH » Tue Aug 27, 2019 6:41 pm

Just stopped by Harbor Freight tonight and got their 39 dollar noid light set. Should make it easier.

User avatar
HRH
Posts: 828
Joined: Sat Jan 18, 2014 8:54 pm
Cars: Lots
Been thanked: 75 times

Re: Wynona the wagon's resurrection!

#683

Post by HRH » Tue Aug 27, 2019 7:08 pm

Confirmed. 1 and 2 have no injector pulse. I didn't check the rest given the symptoms, I think it's pretty obvious. So now I'm going to scour the fsm and find out what controls the injectors. It's getting spark definitely, which should mean the CAS is working. I'm not sure how the fuel is controlled. Checking for stuff I may not have plugged in, but haven't found anything so far.

User avatar
HRH
Posts: 828
Joined: Sat Jan 18, 2014 8:54 pm
Cars: Lots
Been thanked: 75 times

Re: Wynona the wagon's resurrection!

#684

Post by HRH » Tue Aug 27, 2019 8:32 pm

Ok, doing the tests, I'm not getting continuity through terminal 1 of the 6 block that goes to the injectors. I'm getting battery voltage at the injectors, but those have to switch to ground to fire. The 1 spot on the injector harness going to the ecu block is the problem. I hate reading wiring diagrams, but it also mentions Air Regulator (-) 1 and Air Regulator (+) 2 next to the 6 block connection on the wiring diagram for troubleshooting injector system.

I'm thinking that means I have a break in the 1 wire, which would indicate it can't find a ground to switch for the ECU???? Or something to that effect. Anyway, test is put spot 1 to each injector wire on the ECU connector block, and all of them have good or crappy continuity with 3,4,5, and 6, but none have continuity with spot 1. Which means something is screwed up. Unless having the connector disconnected to test is why. Fuck. I HATE WIRING!!! I'm so crossed up now I'm giving it a rest for the night.

Short of it is, the injectors are getting power both sides like they're supposed to, but they're not getting a ground signal to fire, hence the issue.

User avatar
HRH
Posts: 828
Joined: Sat Jan 18, 2014 8:54 pm
Cars: Lots
Been thanked: 75 times

Re: Wynona the wagon's resurrection!

#685

Post by HRH » Wed Aug 28, 2019 5:06 pm

After thinking on it, I found that negative is common to all the injectors, seeing as it's a batch fire. So basically, now I need to trace the 1 connector up from the 6 plug, and find where the 6 wires join into it and either find the bad crimp there, or a broken wire somewhere in between. If I fix that, it should allow the ground to complete, which will then cycle the injectors and IAC normally. That's my working theory anyway.
Last edited by HRH on Wed Aug 28, 2019 5:08 pm, edited 1 time in total.

User avatar
DRIVEN
Posts: 6497
Joined: Thu Jun 27, 2013 7:05 pm
Location: I've been everywhere
Has thanked: 397 times
Been thanked: 204 times

Re: Wynona the wagon's resurrection!

#686

Post by DRIVEN » Wed Aug 28, 2019 5:08 pm

It's not sequential? Well, huh.
When the only tool you have is a hammer every problem starts to look like a hippy.

User avatar
HRH
Posts: 828
Joined: Sat Jan 18, 2014 8:54 pm
Cars: Lots
Been thanked: 75 times

Re: Wynona the wagon's resurrection!

#687

Post by HRH » Wed Aug 28, 2019 5:10 pm

You know, I'm not sure how that works. I know the KA in the truck is multi-port-fuel-injection but batch fire also. So is the old 280zx turbo. I guess maybe the Neo Rb25s and what not are sequential maybe or Nissan just figured batch fire worked well enough, who cares? Rbs made decent power. They've definitely used it for years.

User avatar
DRIVEN
Posts: 6497
Joined: Thu Jun 27, 2013 7:05 pm
Location: I've been everywhere
Has thanked: 397 times
Been thanked: 204 times

Re: Wynona the wagon's resurrection!

#688

Post by DRIVEN » Wed Aug 28, 2019 5:13 pm

So all the power feeds and all the grounds are together?

Most 'modern' engines have a common power feed but separate grounds at the ECM.
When the only tool you have is a hammer every problem starts to look like a hippy.

User avatar
HRH
Posts: 828
Joined: Sat Jan 18, 2014 8:54 pm
Cars: Lots
Been thanked: 75 times

Re: Wynona the wagon's resurrection!

#689

Post by HRH » Wed Aug 28, 2019 5:24 pm

The test procedure is checking for continuity between terminal 1 and all the other terminals for each injector on the ECU harness (101, 103, 105, etc) And given they all have the same 12 volt signal, the ECU grounds each one whenever it needs to fire, and since they're batch and firing together, all 6 injector spots go to 1, as it shows all of them tied together on the diagram. I only have the engine manual though, not the electrical schematic. Either way I know 1 is a problem so I'll unmask that and see what I find. If nothing, I'll go another route.

User avatar
DRIVEN
Posts: 6497
Joined: Thu Jun 27, 2013 7:05 pm
Location: I've been everywhere
Has thanked: 397 times
Been thanked: 204 times

Re: Wynona the wagon's resurrection!

#690

Post by DRIVEN » Wed Aug 28, 2019 5:30 pm

Interesting
When the only tool you have is a hammer every problem starts to look like a hippy.

User avatar
HRH
Posts: 828
Joined: Sat Jan 18, 2014 8:54 pm
Cars: Lots
Been thanked: 75 times

Re: Wynona the wagon's resurrection!

#691

Post by HRH » Thu Aug 29, 2019 2:38 pm

Motherfucker. So when you check for continuity between terminal 1 on the 6 block connector near the front of the engine, ignition has to be on. Surprise surprise, I have continuity. Back to the drawing board.

What I've established so far is the CAS works. I removed it and spun by hand, both IAC triggers and spark triggers. However, no injector pulse. Reading lots of other forums for similar no injector pulse, haven't found squat for resolution. Theoretically, if the CAS triggers spark, it shouldn't have any issue triggering injectors.

The last guy said the fix was crappy connectors near the wheelwell, super helpful. Anyway, digging into information, I know it's something simple, but yeah, not sure yet. ECU possibly, but a few other threads that have the same symptoms said they tried another ECU, same thing.

This is the link I used, seems to be correct from cross-checking. https://forums.hybridz.org/topic/90784- ... -datsun-z/

Anyone else got any ideas?

User avatar
DRIVEN
Posts: 6497
Joined: Thu Jun 27, 2013 7:05 pm
Location: I've been everywhere
Has thanked: 397 times
Been thanked: 204 times

Re: Wynona the wagon's resurrection!

#692

Post by DRIVEN » Thu Aug 29, 2019 3:52 pm

Keith knows, he's just being a dick and making you work for it.

Can you backprobe your noid light at the ECM? That would eliminate all the wiring.
When the only tool you have is a hammer every problem starts to look like a hippy.

User avatar
wayno
Posts: 4153
Joined: Thu Jun 27, 2013 8:44 pm
Location: Vancouver WA
Has thanked: 58 times
Been thanked: 250 times

Re: Wynona the wagon's resurrection!

#693

Post by wayno » Thu Aug 29, 2019 4:04 pm

OK, the thing I would check now is if you have power to everything when the key is in the start position, remove the wire that excites the starter and see if you still have power to everything in the start position, maybe you already have done this.
“The difference between genius and stupidly is that genius has its limits” Albert Einstein

User avatar
HRH
Posts: 828
Joined: Sat Jan 18, 2014 8:54 pm
Cars: Lots
Been thanked: 75 times

Re: Wynona the wagon's resurrection!

#694

Post by HRH » Thu Aug 29, 2019 8:28 pm

I found one injector ground that wasn't grounded. Grounded it. No change. Got depressed and angry. Finally called a guy I know and told him cash money to make this thing work. He's coming by Sunday. I'll let you all know what we find. If nothing, I'll buy the $700 harness from wiring specialties. Hoping I can make this one work. Everything works, except injector pulse. I think it's a ground issue, but damn if I can find it.

User avatar
DRIVEN
Posts: 6497
Joined: Thu Jun 27, 2013 7:05 pm
Location: I've been everywhere
Has thanked: 397 times
Been thanked: 204 times

Re: Wynona the wagon's resurrection!

#695

Post by DRIVEN » Fri Aug 30, 2019 4:31 am

Can you post the wiring diagram?
When the only tool you have is a hammer every problem starts to look like a hippy.

User avatar
HRH
Posts: 828
Joined: Sat Jan 18, 2014 8:54 pm
Cars: Lots
Been thanked: 75 times

Re: Wynona the wagon's resurrection!

#696

Post by HRH » Fri Aug 30, 2019 5:00 pm

Unfortunately, this is what I have. https://wiki.r31skylineclub.com/images/ ... inouts.jpg

I have the engine FSM for the RB, but it doesn't include wiring diagrams. I have basic wiring diagrams in the engine manual, but not the old spaghetti line pullouts like in the '83 FSM I have. Just began wondering about the oil pressure switch. I remember Honda's having the needed before the fuel pump was operational. Not sure if mine is plugged in, I'll have to go check. I think it is, but you never know.

User avatar
wayno
Posts: 4153
Joined: Thu Jun 27, 2013 8:44 pm
Location: Vancouver WA
Has thanked: 58 times
Been thanked: 250 times

Re: Wynona the wagon's resurrection!

#697

Post by wayno » Fri Aug 30, 2019 5:30 pm

I don't know how newer engines work, but my diesel engines need oil pressure for them to start, but if I unplug the wire from the sender/sensor it thinks it has oil pressure when I turn the key on because there is no ground as I removed the wire.
“The difference between genius and stupidly is that genius has its limits” Albert Einstein

User avatar
DRIVEN
Posts: 6497
Joined: Thu Jun 27, 2013 7:05 pm
Location: I've been everywhere
Has thanked: 397 times
Been thanked: 204 times

Re: Wynona the wagon's resurrection!

#698

Post by DRIVEN » Fri Aug 30, 2019 5:44 pm

So if you unplug all the injectors, then turn on the ignition to "run", what do you have at each injector connector? 1 12v and one open? Or 1 gnd and one open?
When the only tool you have is a hammer every problem starts to look like a hippy.

User avatar
Laecaon
Site Admin
Posts: 4437
Joined: Wed Jun 26, 2013 7:21 pm
Cars: '71 510 Wagon, 02 BMW 325i Wagon
Location: PDX, West side.
Has thanked: 90 times
Been thanked: 117 times

Re: Wynona the wagon's resurrection!

#699

Post by Laecaon » Sat Aug 31, 2019 11:01 am

Wiring Specialties posts the pinouts here:https://www.wiringspecialties.com/ecu-pinouts/

R32 GTR FSM, page 778 on are the wiring guides https://nicoclub.com/FSM/Skyline/rb/R32 ... Manual.pdf

User avatar
HRH
Posts: 828
Joined: Sat Jan 18, 2014 8:54 pm
Cars: Lots
Been thanked: 75 times

Re: Wynona the wagon's resurrection!

#700

Post by HRH » Sun Sep 01, 2019 6:47 am

DUDE, LAECAON, THANK YOU!!! I couldn't find that for what ever reason. I had the engine manual, but didn't give the whole schematics with wire colors, the guy who's coming over was already pissed about that. I quote, "You're doing it the hardest way possible and you went balls deep." Lol, this will undoubtedly help. I have the wiring specialties instruction manual for their wiring harness (which I don't have....yet) and I've been comparing it too. I know there has to be just something stupid not in the right place or not connected, just haven't been able to figure out what.

I have pins 43 and 10 with continuity at the ecu, which is odd to me, because one is a ground, the other is the start signal that's supposed to go to the starter. Which maybe the momentary positive while cranking is supposed to operate like that because Nissan loves to switch grounds and whatnot.

If I connect pin 18, fuel pump relay, I get a 3/4 knock sensor code on the computer. If I leave it disconnected, its 5/5, all good.

I'll report back today, we'll see what comes up. Worst case, something is fucked, I get a new harness. Best case, the engine will run today.

Post Reply