RB not starting

[jrd450r]

Well I finally have time to work on my car since its summer and im done with classes. I have my car all wired up, 1990 s13 with S1 RB25det. Everything seems like it is right, I turn the key to acc and then to on, when i hear relays click on, my fuel pump primes, and something on the left side of the car is making an intermittant click. Then I turn the key to start and nothing happens, my starter solenoid does not click nore does the starter turn. I think its a problem in my starter wireing. At the starter I have a wire going to the battery and the the solenoid wire, I have going to the interlock relay under the passenger fender by the grey and brown plugs. My solenoid wire came cut so I looked in the 240 diagram and it said that wire went to the B/Y wire on the interlock relay. Any ideas? my starter does work though, I hooked it directly to the battery, and it clicked then spun like it should. Please help me out I wanna start this thing this weekend.

[March]

I think i may know what your problem is... its a relay you have to bypass i think, i had the same problem. ill see if i can dif up the info for you.

[jrd450r]

Well I was able to solve the starter issue today, for some reason the wire diagram had the input and output switched on the interlock relay. But still an issue. Now it spins the starter but doesnt start. I went though all my ecu and dash plug wiring, and it all seems right. I also probed the wire going to the injectors and it is 12V when the key is ON. Im not sure what the issue is. I just put new plugs in also.

[USMCgetsome]

ok things to check then. SMELL OF FUEL. Check ignition firing. Check that all sensors are plugged in. Knock, water, air, maf, o2. IF still nada pull codes from ecu. If all clear. Reset ecu. Then start again. still nada call me 210-837-1670 name is mario.

[jrd450r]

I dont think Im geting any spark. I probed the wires going in and out of the ignitor on top of the valve covers and its showing 0v every where. Do I need to run a power source to the ignition? If so where should I run the power to? I really appreciate help guys Ive been trying to get this thing started for like a month now.

[Bluefire]

coils get power via the ecu relay... Should be the relay down by the ecu...

[jrd450r]

Well I did alot of troubleshooting today and found out my plugs werent sparking, I needed a 12v source for the coil. I then pulled the plugs and the CAS and verified that the plugs were firing. That is now fixed and it still doesnt start. So next I spun the CAS and listened for the injectors to fire. Im pretty sure they are working. I hear a very very faint click noise as I rotate the CAS. Does this mean they are working? When I pulled the plugs they were completly dry. Any more advice or tips? Again this is much appreciated! Thanks.

[jrd450r]

I just poured raw fuel into my cylinders and it started instantly. So the issue is my injectors are not working. As I said in my last post I tested them and could hear a faint click when testing them. They have 12V to the gray power wire. The other wire gets like 0.4V when triggered by the CAS. Could it just possibly be clogged injectors? Any other guesses?

[ISUJinX]

Make sure that its a constant 12v and not just "start" position 12v. It should be "t"'d into the Black/Red wire that runs to your ECCS relays under the dash by the ECU. And then check your ground straps. Twice.

[URAS]

check to see if your fuel supply and return lines are not back to front (the one off the reg is return)... i did this once many years back.... very embarassing. :P
Modified by URAS at 4:58 PM 5/15/2007

[jrd450r]

For the last two replys, Yes it is a constant 12V, I jumped it diectly to the battery to see if mabey it wasnt getting enough power but no change. As for the fuel lines, I am 100% sure they are right since i pulled the feed line off and made sure it shot out gas when I put the key to ON.

[sniperbill3]

Sounds like you have major problem on your hand make sure all the wires are connected everywhere they are supposed to be

[ISUJinX]

Does the engine crank and not fire at all, or does it sputter? Does it not crank? i.e. is the starter wired up right? Is the fuel in your tank good? Has the engine started before - or is this a new swap? Check to make sure you have ECCS power, and have both relays in.

Pull a plug and crank it to see if its squirting fuel at all. If its not then check your wiring again =/. My problem for the longest time getting no fuel was because my gray wire (injector power) wasnt hooked up right... but it sounds like you got that fixed.

EDIT: ok... didnt read the whole thing today like i did last night. The only thing you have to wire up to make the injectors fire is the Power source. They ground through the ECU when it switches them on, so I'm at a loss.

[jrd450r]

Its a new swap, if i put gas in cylinders or spray some carb cleaner in the intakes, it will sputter for a second and thats it. I know every cylinder is sparking, since I tested that. I tested my injectors and I can hear them but I did not visually inspect them to see if they are squirting since I really dont want to pull one out and mess up the seal.

[Bluefire]

Ok make sure the injectors are actually clicking... you should be able to put your finger on one and feel and hear them click as you spin the cas. If they are clicking but no fuel is coming out, then you are not getting fuel pressure in the line. and either your lines are backwards or your fuel pump is not working.

If the injectors do not click and they are getting power, then most likely a problem with the ecu...

-Bluefire

[jrd450r]

Yea I already tested them by spinning the CAS. I could hear a faint clicking sound. I thought mabey fuel pressure too, but I opened the gas tank cap and it went "pshhh" like there was a decent amount of pressure in there. I know there is fuel getting up to the motor because I pulled off the feed line where it connenct to the motor and then I turned the key to ON and gas flushed out of it. I also know that my lines are on properly. I have the feed line going through the injectors and then the return line comes off of the stock FPR.

Any idea on what numbers should be on my ECU? The company I bought the motor from gave me the wrong MAF, mabey its the wrong ECU. I have a Series 1 RB25. The plugs went together fine though.

[Yellow4g63]

Try and unplutging the maf and starting the car. It won't rev past 2500 without it tho but a good way to test if it's the maf. Check the ecu codes too.

[jrd450r]

Still no luck, I worked on the car a bit today and testedmy grounds to make sure there was not too much resistance but they checked out fine on the ECU and manifold grounds. I still know its an injector/fuel issue becuase if I spray carb cleaner in the manifold or some gas, it fires instantly and then just shuts off. I spun my CAS and can hear my injectors clicking slightly so it sounds like they wre firing but I dont think any thing is coming out. What could cause this?

[URAS]

are you 1000% sure that the feed is connected to the right part of the fuel rail? is sounds like you have the feed hooked up to the return and the return hooked to the supply.

swap them round just fo the hell of it.