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Engine Tech Technical discussion related to all relevant engines such as KA, SR, RB, CA, 2JZ , L24/26/28, VG, VQ, and LSx series. |
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01-23-2009, 12:17 AM | #2 |
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Made a new website dedicated to RB engines check it out:
RBforums - Forums-RB parts catalog/wire diagrams/FSM's. |
01-29-2009, 04:34 PM | #3 | |
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Quote:
A couple of days ago, I finally got the 240 started up and drove it in the driveway. There are a couple of things that I am concerned about. 1. As I am cranking the motor, it is turning over and making a grinding sound. It starts up, but I was thinking maybe it has something to do with the Starter not engaging correctly. 2. When I am in neutral and open the throttle, it seems like there is a rev-limiter on it. I think that may be due to the MAF Sensor and/or wires. I am going to recheck those wires and make sure everything is solid. Anything else I should check into?
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01-30-2009, 11:03 AM | #5 |
Zilvia Junkie
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not entirely sure. if i had to make an educated guess, i would say between 2500-4000 rpms. we only wired up the necessary wires to get the car started. i have to drive it from one place to another to get someone else to help me finish up the wiring.
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02-25-2009, 10:39 PM | #6 |
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on the intake manifold near the AAC Valve, there are 2 lines that i believe are vacuum lines and i was wanting to know if someone has a picture or information to where it connects to. i thought it was hooked up to the charcoal canister, but i am not sure.
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02-28-2009, 11:55 PM | #8 |
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thanks Zacho!!
it looks like the lines are the "To Canister" and "to recirculation valve". since i do not have the charcoal canister, i can put a cap on those 2 lines, correct? today i swapped the MAF wires (the black ones) and now i can rev higher than i used to. i tried to put it in gear and drive it and it was trying to stall out while letting the clutch out. could that possibly be a vaccuum leak?
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02-08-2009, 03:01 PM | #11 |
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you know what else you can do to fix that rev limiter problem .
i remember in my car at one point did the same thing. turns out that it was the Cam Angle Sensor was barely connected thus rev limiting at the same point in your case 3-4K RPM . so just check out the Cam angle sensor
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1992 240sx (RB20. 362whp@16psi) |
02-14-2009, 12:15 PM | #12 |
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Thanks. I will check that out as well.
Update on mine: I believe that the starter is going bad. Sometimes it starts and sometimes it seems like when I try to crank it, it does not do anything. I tried another battery and that did not solve the issue, so I believe that it is the starter going out. The car seems to idle fine, but when I put it into gear and let the clutch out, it dies. I made sure the connections on the MAF were good. I am going to try and switch the black/gray, black wire to see if that makes a difference or not.
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02-16-2009, 11:28 AM | #13 |
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Hey guys, I couldn't find a post with anyone sharing the RB25 ecu codes...so I thought I would post them up. These are straight out of the ecr33 manual.
11 Crankshaft position sensor 12 MAF sensor circuit (air flow meter) 13 Coolant temperature circuit 14 Vehicle speed sensor circuit 21 Ignition circuit 31 ECU (ouch!) 34 Knock sensor 43 Throttle position circuit 45 Injector leak 51 Ignition circuit 54 Auto signal to ECU 55 All OK --->There are three different types of factory ECU available in Skylines. One type has two LEDs and five modes The second type has one LED and two modes The last type has no LEDs, the output is done with the engine checklight in the instrument cluster. Acts as a single LED ECU. How to check codes: 1. Switch on the ignition, but don't start. The LED on the ECU will be glowing. 2. Turn the selector screw clockwise all the way (gently!) 3. For two LED ECU's: the LED will flash once, pause, flash twice, pause... all the way up to five. This is the diagnostic mode. Mode 1=one flash, mode 5=five flashes. When you reach the right mode, turn the screw back counter clockwise. Mode 3 is what most people use. 4. For single LED ECU's: wait a couple of seconds, and turn the screw back counter clockwise, the ECU is now in mode 2. 5.The engine check light on the dash will mirror the LED on the computer. The LED will flash out a code(or series of codes if there is more than one fault) The ECU will keep error codes in memory for 50starts, so keep in mind if an error happened 51 starts ago, there will be no record of it in the ECU. More recent ECU's have two LED's (red = first digit, green = second digit, for example, red 2x flash, green 1x flash = code 21) The ECU's on most R32's have one LED, long flash = first digit, short flash = second digit, for example, long, long, short = code 21. Hope this helps you guys! |
04-01-2009, 11:15 PM | #14 |
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Ok, so after finishing a nice RB25 S2 swap into my S14 the last thing we do it run a 180 degree "U" to recirc the heater core input/output on teh motor. Well, it wasn't tightened down as good as I thought and when I started up motor it idles perfectly and everything was nice. Only thing is, a litle started to leak onto my starter and now I can't turn the key to start my car anymore, only push start. Luckily I have a hill down my driveway.
I could've sworn I read somewhere another starter could be used but is my only option an OEM one? |
04-02-2009, 11:34 AM | #15 | |
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Quote:
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04-02-2009, 01:25 PM | #16 |
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i cant get on nico club right now, but theres a US replacement for the starter, from what i remember its really cheap too. search the rb section there and you will find it.
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04-08-2009, 03:49 PM | #17 |
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Just got some RB30E short blocks and will be making a couple hybrid swaps using Rb25 and RBb26 heads. will post all of the detailed modifications needed for the swap as well lots of missing info from posted guides that are posted online.
Set up 1 R34 Neo Turbo head swapped to the Rb30e bottom end - normal aspirated version / turbo version. Set up 2 same as above but using the Rb26DETT head and intake will post photos and steps needed. |
04-15-2009, 02:35 AM | #20 |
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Just thought I would post this... replacement for rb25det S2 starter is any 2.5L suburu starter. It's all Toshiba/Mitsubishi stuff just like is on our RBs..
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04-15-2009, 03:58 AM | #21 | |
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Quote:
i also heard somwhere that its possible to use a sentra starter , not sure what year though
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1992 240sx (RB20. 362whp@16psi) |
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04-23-2009, 02:22 PM | #23 |
hello there, first post.
i'm installing a s2 rb25det into my s13 coupe and i'm trying to find a way to adjust the tach signal. now i know you can use the j30 tachometer and they are available anywhere ie: ebay, junkyards. but i have h.u.d. in my car. will this in any way affect the electronics in my hud? has anyone tried it before? i don't want to switch to analog speedo cluster. i found link a few weeks back that show step by step on how to adjust (w/ pics) the tach from the back w/o having to replace the gauge itself. does anyone know? tried googling it but i forgot how i word it. thnx |
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04-23-2009, 02:37 PM | #24 | |
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Quote:
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04-23-2009, 04:38 PM | #25 | |
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i think for the speedo u wanna use a '96 300zx z32 n/a vss m/t. but i might be wrong |
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05-25-2009, 05:56 PM | #26 |
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any one knows how to install the water tube into a gredy style intake manifold. my came seperated and it looks like its brass or copper. i took it to get it welded but the guy said he could n do it, i heard that u could just push it in with a rubber mallet, but min is to loose and it just goes in any ideas tnx..
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06-03-2009, 12:08 PM | #27 |
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coat it with a bunch of red high temp sealant and push it in, or go to your local home depot and get a peiece of tube that fits better and also coat it with sealant to prevent leaks
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06-15-2009, 01:52 PM | #28 |
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im putting an rb20 in an S14
any suggestions on what i can pick off my Ka stuff and use with RB and also which trans can go on it besides an rb one and suggestions on mounts or is this gonna be almost direct |
06-17-2009, 12:40 PM | #29 |
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I'm pretty sure people have been using the stock KA xmember with RB mounts and you can use the stock driveshaft. You can use the KA radiator also. Only the RB bell housing will work so you can't use another tranny (unless you swapped the bell housing)
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06-29-2009, 05:46 PM | #30 |
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okay guys... my 240sx project is nearly completed. the major thing left to do is get it painted and figure out the wiring for the tach/speedometer.
anyone have a link that will help explain how to wire up the transmission to get the speedo/tach working? Am I just going to have to get an aftermarket Tach? I tried searching, but could not find what I was looking for. Maybe someone who has seen a thread before can point me in the right direction. thanks!
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