Help get her started

Discuss the RB20, RB25 and RB26 series engines.
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420_240
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Joined: Tue Jan 20, 2004 12:21 pm

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I'm getting so close to the end i can almost taste it... i'd appreciate any type of help i can get so we can have another member of the "running" rb community....I had my harness done by mckinney.... I've hooked up all the plugs in the bay, and connected it to the ecu... grounded the negative battery cable, the very small ground that comes out of the harness, and any other ground i could find has been grounded. this seems like i should have power whenever i turn the key in the ignition... i have none. I've tried turning the key to start and it does nothing....

I haven't got any clutch fluid so my clutch has zero compression...

Please help me diagnose this.... I'd be more than happy to answer any type of questions or suggestions you guys throw at me....Thanx


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NissanTurboSix
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Joined: Wed Nov 17, 2004 6:44 pm

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Not a whole lot that can be wrong if you aren't getting power anywhere. Try to verify that you arent getting power to anything.

First and foremost, check your battery. Your car hasn't been run in a while. Make sure you have a well charged battery in the car.

Check Ohms resistance btwn:Neg. Terminal and chassisNeg. Terminal and blockPos. terminal and starterPos. terminal and the 12 gauge (white I think) wire that feeds power to everything but the starter

Check all fuses.

I just drove my 25 for the first time yesterday so I know the anticipation that you feel!

rb250sx
Posts: 292
Joined: Wed Jul 16, 2003 4:32 pm
Car: '89 s13 w/ RB25DET
'07 Nissan Frontier
'14 Jeep Rubicon

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if you dont have power to ANYTHING then you may have blown the main fuse that connects to the altenator. its a 75 amp fuse in the engine bay fuse box. and if you blew it, you more than likely arent grounded somewhere, more specifically the altenator. I believe this is the only fuse that will cut everthing off in the vehicle

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420_240
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It's dark outside and i can't really see what i'm doing right now... but i went with the weak battery idea... I hooked up my battery... then pulled another car next to mine... got some jumper cables and when i connected both batteries... there was a winding noise coming from the starter i believe.... couldn't really see cause it's dark... but thats where the noise was coming from... i might need to switch the pos/neg. terminals on the lower harness... maybe this would be the problem... after i hooked up the second battery... i had dash lights, my wipers started, turnsignals, ect.... i should have some more information tomorrow with the help of some sunlight... please keep the suggestions comingvery appreciative

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NissanTurboSix
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Goofy **** happens when you battery isnt up to par. Jumper packs and other batteries could cause other problems. I found this out the first day I tried to start my car:

http://www.240sxforums.com/for...44052

Charge your battery/get a new one. I wouldnt do much until then. You would be just waisting time and frusterating yourself.

EDIT: This forum edits out swear words? That takes out all of the flavor. What the ****.

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420_240
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would clutch fluid be neccessary to start the motor?... since i have none my clutch pedal has sunk to the floor... when i hooked the battery to the jumper cables i had power to my dash so that was a good sign... so i should charge my battery, check fuses, and fill clutch/brake resevoir, add coolant flush... god i wanna hear that I-6 combust!!!!!

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NissanTurboSix
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You dont need clutch fluid. Just make sure you in neutral.

When you go to add fluid, dont get freaked out when the pedal doesnt rise. It needs to be bled ALOT in order to function right.

S13Sil-line
Posts: 526
Joined: Thu Jul 31, 2003 10:02 am
Car: Full throttle-*** out sideways

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Nope. Thats how I did mine for a week until I decided not to be lazy.

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sparksta
Posts: 66
Joined: Tue Jul 27, 2004 6:01 pm

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hey man wassup. if you need some extra help man hit me up on aim. even though i dont have a rb25 its always better to have someone to get feedback off of. my aim is : sparkybeerandon
Modified by sparksta at 7:46 AM 11/23/2004

rb250sx
Posts: 292
Joined: Wed Jul 16, 2003 4:32 pm
Car: '89 s13 w/ RB25DET
'07 Nissan Frontier
'14 Jeep Rubicon

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although you dont need clutch fluid if you are starting the engine, make sure you have transmission fluid in there, because the input shaft does spin. kinda off topic, but didnt want to you start it up with no fluid in there.

theXfiend
Posts: 27
Joined: Sun Oct 24, 2004 7:47 am
Car: 1992 240sx coupe SE w/ rb25det

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make sure you connected the starter ground, without this none of your power will work.

its a 1 prong connector that clips onto the starter, and from there splices to the thick black/yellow wire at the KA fuse box

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420_240
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I'm not sure if i grounded that right... you could be on to something... rb250sx thanx for the input about the transmission fluid... I need to pick some up as well... where is the plug on the transmission to fill the fluid??? It seems like i only have access to the plug on the bottom... thanx again for the input about the clutch fluid as well... i'll have more info tomorrow when i can actually see what the H*ll i'm doing

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sparksta
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i believe the plug was on the left hand side of my transmission

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JonPowell
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theXfiend wrote:make sure you connected the starter ground, without this none of your power will work.

its a 1 prong connector that clips onto the starter, and from there splices to the thick black/yellow wire at the KA fuse box
That is not the starter ground, it is the solenoid trigger!!!

The starter ground through the engine block!!!

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420_240
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update:with lots of help from jon powell... i realized i had my lower harness all fooked up... had to do a lot of switching around and what not. Only delimma is the spade plug that clips to the rb starter.... I'm curious if i can remove the ka female spade plug and the wire that attatches to the ka starter... and somehow manipulate it to attatch to the rb plug. It's a really tight stretch if i just try to fit the spade plug onto the rb starter prong.... maybe by removing the piece from the ka i won't have to extend any wires?

blk240sx
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Joined: Mon Jul 29, 2002 5:29 pm

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Hey 420 ..whats your name? I have a close friend that use to live in Paducah. my email is [email protected] same for AIM too

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420_240
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Update: I took my spade female and wire from my KA starter... jbwelded it to the rbstarter prong... with the 240battery hooked up to jumpers and another car... it'll go, "chuchuchuchuchu" if i try again, "chu-chu-chu-chu", and again, "chu--chu--chu--chu" so on.... not sure if i'm getting fuel cause i have a t-fitting in my fuel feed line, (filter -> bottom fuel rail line).. nothing is connected to the t-fitting (i'm going to use it for my fuel pressure gauge... so it should have spit gas everywhere but it didn't... not sure.

blk240sx: my aim is azinkrb250... i added mmdeuro to my buddylist so i should bealbe to talk to you next time you're on

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NissanTurboSix
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Go ahead and spray some carb cleaner in the intake. Car should start. The problem probably lies with your fuel pump. Tear off one of the lines and see if there is fuel there. If not, take the black/pink wire that if you followed the 8-step wired to a plug, and cut it and ground it to the chassis.

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420_240
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I need some suggestions on why my fuel pump isn't pumping...i checked the fuel fuse... it's good... the wiring harness is good cause mckinney did it... Shouldn't the fuel pump prime whenever you turn the key and power to the cabin is accessed? (right before you start the car).... so i should hear it correct?... I know the pump is ok cause i bought it brand new... i think maybe the wiring from the pump to the plugs might have something to do with this... the butt connectors i used didn't work that well so i need to double check... When should there be pressurized fuel in the fuel lines?

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NissanTurboSix
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When the key is in the ON position, you should hear the pump. If you have a walbro, its loud. Make sure you are getting power to the fuel pump fuse. Check fuel pump relay.

When I wired my car, the black/pink wire goes to the ecu which triggers the fuel pump. For some reason my ecu was not grounding the pump. Since the fuel pump fuse only got keyed power, I just grounded the black/pink wire my self perminently and by passed all the other crap. Works like charm and Ive been running my car like that ever since.

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420_240
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Ok when the key is on i don't hear a fuel pump... so i am assuming i will have to remove it again and do a better job at connecting the fuel pump pos/ground to the plug pos/ground.... Nissanturbosix... i will look into the blk/pink wire and see about grounding it... thanx for the info brutha's keep the information/suggestions/ideas/improvements flowing

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NissanTurboSix
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Your fuel pump is probably installed right. Its hard to screw up. Locate the black/pink wire. If McKinney wires their harness like most do-it-yourselfers its probably near the front of the car on the intake manifold side of the engine bay. Just cut that wire (leaving enough wire to splice it back if it doesnt work) and ground it to the engine bay with an eye-lid connector.

theXfiend
Posts: 27
Joined: Sun Oct 24, 2004 7:47 am
Car: 1992 240sx coupe SE w/ rb25det

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the ECU gives the signal to the fuel pump to turn on. so if all the other stuff checks out you may have an ECU problem

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420_240
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thanx for all of your suggestions fellas i really appreciate the help... i'm going to mess w/ the pump tomorrow so hopefully i can get it going...

this is a little off topic but i'd like some input anyways... i've read that when installing the walbro... it's a good idea to use the oem sock from your previous pump... due to reasons of gas below a 1/4 tank and hard cornering the 2x2 walbro sock fails to pick up fuel? ... anyways just something i wanted to throw out there....

I really do think it's the buttconnectors i used (i hope)... i'm going to remove the pump AGAIN... and check the wiring... any suggestions on a better way to wire the pos/grnd together without using those shiitty connectors????

thanx everyone

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NissanTurboSix
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I hate those butt connectors too. I kinda of took a chance and decided to try solder and shrink wrap. Im thinking the gasoline might eat away the shrink wrap but Ill check in a few months and see how its going.

If the connection is good, dont freak out and think the ecu is bad, just ground that black/pink wire. Personally, I would to that before I even pull the pump.

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420_240
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ok i've pulled the pump... took off the butt connectors, twisted the wires together by hand.... still nothing. I switched them to see if that would do anything... got nothing. Fuse is good. I'm looking for a pink/blk wire can't find it anywhere... could you send me a pic of what you're talking about? i'm not sure if this problem would have anything to do with this picture... these are the only two plugs i can't find a place for....**Where the hell is the fuel relay??? s14 fuel relay????? anyone????
Modified by 420_240 at 2:08 PM 11/26/2004

theXfiend
Posts: 27
Joined: Sun Oct 24, 2004 7:47 am
Car: 1992 240sx coupe SE w/ rb25det

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the black/pink wire comes out of the Main white RB plug, and runs into the engine bay to a plug behind the battery.

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NissanTurboSix
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Joined: Wed Nov 17, 2004 6:44 pm

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Plug looks like this:



Should around where the battery goes if you still have your battery under the hood.

On a side note, do you still have your front clip?


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420_240
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Joined: Tue Jan 20, 2004 12:21 pm

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Hey man that picture won't work... it's that stupid red X... yes i still have my clip

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NissanTurboSix
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Joined: Wed Nov 17, 2004 6:44 pm

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Err, right click the picture and hit properties. Copy/paste that into your browser. BTW the pic is just from the 8-step.

About your clip, are you using KA gauges are RB gauges? Can you send me your R33 cluster plugs if you arent going to use them?


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