Won't start

[capowered240]

I wanted to know if I have fried my ecu. I did a CA18DET swap in my S13 240. I didn't know about the dropping resistor. So I got everything hooked up and ready to be started for the first time. So I cranked it over and it wouldn't start. I did that 2 more times. It still didn't start. So I just left it alone for awhile. I got home, got on the internet and found this Nico.com, the ckicked on the CA forum. I had found that someone had wrote, you can fry your ecu if you try to start your car without the dropping resistor. Is that true? also when I turn the ignition to the on position, the red and green lights come on on the ecu, but then when I try to start it, they both go off. injectors are good, all coil packs are good, I get spark, I get fuel. Wha does that sound like? Hopefully I didn't fry the ecu.

[NISTECH]

If your getting spark and the injectors are pulsing you likely didnt fry your ECU. Have you run a compression check on the engine to determine its integrity? How much fuel pressure do you have and is the timing on as checked with a timing light when cranking?

[capowered240]

When I turn the ignition to the on position, the injectors don't make that clicking sound. I haven't ran a compression test yet. I don't know how much fuel pressure I'm getting. Also, I haven't checked the timing yet neither. The only thing right now that I'm trying to figure out is the injectors not making the clicking sound. I tested all the injectors and their all within the 2-3 ohm range. The compression, timing, and the fuel pressure test I'll do this weekend.

[NISTECH]

use a noid light to test the injector circuits. Search for noid light I have posted many times about it.

[capowered240]

What if I don't get a pulse checking the injector connector? The dropping resistor is good.

[NISTECH]

I assume you didnt get a pulse while cranking since you ask. You need to see if you are getting power to the injector connector then. One of the wires should be battery voltage with the key in the on position. If you gont have it, you need to check fuses and your EGI/Eccs relay.

[capowered240]

I'm not getting any power to the injector connector with the key to the on position. All the fuses are good. ECCS relay is good.

[NISTECH]

The you need to see if your getting power to the ECCS relay. DO NOT use a test light in there. Use a volt meter and check for power in the relay sockets. Tell me which ones have power. Also is this the original car harness or is it a swap in harness. I am not familier with all this swap crap but I can likely figure it out if I know what is in the car.

[NISTECH]

Also what year is the car?

[capowered240]

When I turn the ignition to the on position, the eccs relay clicks. This is an 1989 240sx. It had the ka24e in it. Swapped it out with the ca18det. I got the engine, engine wiring harness, ecu and 5 speed trans. I think they had swapped the transmission out before they shipped it because It came with engine wire harness for an auto. It still had the 2 wire dropping resistor for the auto still on it.

[NISTECH]

The eccs relay receives 2 seperate power sources. It is essencaily 2 circuits one is the relays operating circuit the other is the realys switch ciruit. If power is not available to the switch ciruit the relay switching wont do anything. This is why I told you to check for power.

[capowered240]

I checked the relay sockets and with the ignition to the on position, #1,2,5 get power. #3 doesn't.

[NISTECH]

You should not get 12 volts at 2 with the key on.

[capowered240]

I'm sorry I'm wrong. #1,3,5 get power. #2 doesn't. I really do appreciate you helping me with this.
Modified by qwade25 at 10:06 PM 10/1/2005

[NISTECH]

Ok now you need to install the relay and position it so you can probe the back side of the relay socket with the relay installed. turn your key on and check for power on the 4 sockets that are closer together 1 and 2 should be far apart as compared to those other 4 terminals . DO NOT probe 1 and 2.

You should have 12 volts on all 4 of those terminals.

[capowered240]

With the relay in and the ignition to the on position, 1,3,5 get power. #2 doesn't.

[NISTECH]

DO NOT probe 1 and 2.

Did you miss this in my last post?

Your relay is not completing the circuit.try another same color relay and see if it works.