RB20DET Troubleshooting, no start - VIDEO

[Acecool]

cpt, lemme try that real quick, ill find which one has power without relay in and see if that does it :-)

Josh

[Acecool]

yes, orange connects them together, but does not go into harness... just them 2 connecting...

Isnt orange ground????? - I have one orange wire connected to it, but maybe thats why im not getting spark, maybe the white connector needs to be connected with this orange wire??

I did a test, I cut the wire, lights turn off, and on properly... but relays DO NOT CLICK unless the wire is together...

Josh

[craz4240]

Ok this may sound like a dumb question but do you have 12v going to the center wire on your coils with the brown wire disconnected from your white/purple?

Also have you pulled an injector plug and put a noid light on it to test if the injectors are pulsing?

One of those plugs on your video towards the bottom of your motor looks like the one I have going to my starter...but thats not your issue.

Without the brown wire going to the white purple you are having better results...leave that off.

DO you have an FSM? you need the relay wiring diagrams cause you are gonna have to check power on the green relays and also continuity between the orange wires on the relays and the ecu,the switched ground on injectors and ecu,the injector power wires and ecu.

Did you pull your CAS??And spin it with a couple coils with spark plugs sitting close to your rocker covers to see if your getting pulse?

You have a wiring issue....first thing...ignore the brown wire to white/purple...unhook that and leave it.You need to send power to your relays and make sure they have continuity with the ecu...thats step 1.make sure you do this via wiring diagram on the fsm.

[Acecool]

Just got a wiring diagram for that connector from skylineowners.com...

Also, for the question, with constant power to the white/purple yes,, power to center wire...

Ok, heres the diagram...

Orange/green w silver bands = neutral switch to pin44 on ecuLight green with silver bands = aircon relay pin 9light blue with silver bands = power steer pin 19white/purple constant 12v pins 58 and 59red/black = ign on pin 45 (switched power goes here)white/black = constant 12v pins 58 and 59..

Im going to rewire the connector with this diagram...

[Acecool]

She lives, check the other thread for the video :-)

Was a wiring issue... ecu wasnt getting the start signal which is the orange wire from 240sx to the ecu pin 43 black/yellow in my case, and the relay orange wire to the orange wire on the ecu which is for the ign relay :-)

YAY!!

[silviasgp06]

is it a common practice to try and star the motor with no MAF?

and yeah i saw that someone told him to unplug is but did he not get what was happening before it was unplugged.

HE has the MAF hooked to the tube that goes to the intake of the turbo like its supposed to BUT the turbo is pumping air back into the atmosphere because he does not have the turbo piped to the throttle body(inter cooler or not)therefore the metered air the the maf is getting is getting sucked into the turbo and back out into nowhere and the engine is running naturally aspirated

21 seconds into video 3 you can see that no piping is hooked upand in the running shot all this is still not hooked up

sure it started, but it will not drive right, if at all like this.

this is the second time ive seen someone trying to get a rb20 to start like this.

so is it common practice to try and start a rb with no MAFS?

[Acecool]

no maf = limp mode = will not rev above 2500 rpm...

Ive got all the tubing back on now except the fmic piping and it idles flawlessly.. the surge you heard in the video was from the alternator belt not being tight enough...

so, once I have the vacuum system sealed all the way then the maf will go back on :-)

Josh

[silviasgp06]

ok cool, yeah i know it would of went into limp mode, but i wanted to know if you understood that when it was all hooked up that metered air was going nowhere,but since you know thats good. cause i knew a kid here in Grand Prairie who tried to the same thing, clearly not understanding how a turbo piping system works lol

but yeah get that thing piped up, and clean up the wiring a lil and take it for a test drive. and post another vid.-good luck

[Acecool]

Will do :-)

Waiting on a few more parts, and I am going to make a custom hose for the power steering then hook that up to the ecu so it knows to bump up the idle to compensate.. and I am going to reintegrate ac into it :-)

But first, Ford Taurus fans need to be ziptied in.... I have to cut the shroud a little for that to happen...

Ill post tons of vids when everything is done :-)

Josh

[FAST-DATSUN]

Its defently a wiring problem,, what have you is power all wires hooked to KEY on power , what wires to have hooked to the RB large black with the red stripe??? you have to have (large)white /purple and (large)white/black to 12v all ; not key on power. there are probley others wrong also...