SR20DET S13 Injectors Not Firing, I haven't found answers!

[tiger]

Ok, I just cranked it for the first time yesterday, the fuel pump primed for a second and sounded kinda weird... it would crank but not turn over.

I have spark and also removed the fuel feed line, put it in a cup and primed the pump and it filled the cup with gas, so pump is good and I have pressure to the rail but I keep checking the plugs and they aren't wet nor do they smell like the old nasty gas that is in the tank. I don't have a multimeter so I removed the cas with the ignition in the on position and turned the gear by hand and the injectors clicked 1,2,3,4.... I suppose this means that they are getting power? I used to have an AFC hooked to the wiring harness but I soldered the wires back together, besides, none of the wires to the AFC really would interfere with the injectors firing.

So, If It was a wiring issue or sensor issue, where would I look first? I'm pretty sure that the CAS is responsible for telling the injectors to fire, Right?

I found a similar issue in the search but it was someone with a CA and they were talking about a dropping resistor..?? They didn't really talk about the CAS that much though.

Any help would be appreciated

I'm about to run to the store and get a can of carb cleaner/engine starter to see if i can get it to run!

yes It ran with teh carb cleaner in the intake.. but only for a few seconds. I swapped fuel pumps to another known working one and it works but still no injector fire.. I have spark .

i guess the ECU is not grounding out for the injector pulse. I connected all of my wires just like the FR Sport guide said. My ECU was working the last time I used it. I'm about to give up and just buy an uncut wiring harness because I know it can't be mechanical. Can someone else suggest something else I should try?

[tiger]

Ok, some more info might help...

I just went downstairs and unbolted my fuel rail so that I could see the tips of the first three injectors..

I also unbolted my CAS...

I turned the ignition key to ON

spun the CAS and heard the injectors clicking (No fuel was coming out)

I also hear a relay clicking every so often in the fuse box by the battery (I assume this is normal)

While turning the CAS, I can hear my fuel pump rumbling around (Doing what it's supposed to, right?)

I'm positive I have fuel pressure right up there and my pump is tested and works properly.

So with all that working, are my injectors stuck closed from sitting so long??

Someone PREASE help me... : ( I have to revive my SR!

[duffman1278]

Can you smell fuel when you crank the engine? Because last week, I was having the same issuemy injectors felt dry but I was getting pressure from the fuel pump. Well ended up being a faulty wire on the fuel injectors. So I fixed that wire and I tried cranking it about 2 times for like 5-10 seconds and after the 2nd time I could smell gas fumes, just a bit. Now however I have no spark. So check the wiring on the fuel injectors. Also, some have mentioned a black/red wire around the relay box. Check that one too. And I suggest you get a multimeter, really helps. You should check the resistance.

[tiger]

i dont smell fuel at all, I have spark, the plugs have no trace of fuel on them. I was given a set of nodes, i think that's whta they are called... to put in place of the plug on the injector and see if the light flashes .. I haven't tried it yet because i'm at work. None of my injector wiring has been messed with. Where is this black and red wire exactly and what does it do? Where can I find out what these other people are saying about that wire? I have no multimeter, but I suppose these node things will work or let me know if i'm getting power to the injectors, I figured since they click when i turn the CAS that meant they have power.

[duffman1278]

The red/black wire should be around the fuse box somewhere in that pile of wires. Its for the fuel pump. Maybe check your relay, should be the last relay looking from the top down at the box. Its a green on on the left. make sure you're getting voltage, verify with the FSM but it should be the top 2 pins on the relay that require voltage.

[tiger]

but my fuel pump is working.....

[duffman1278]

Make sure you didn't mix up the return and feed line. Some people have done that before. But assuming you have them correct, you should test the injectors themselves to see if they work, but I would doubt their broken. I'm stuck lol

[ffreddie161]

there are to relays in the fuse box under the hood . one is the egi pump ...this is for your fuel pump the other is the egi relay right next to it...this is for your ingectors to fire ... some times a loose ground to the egi relay stops your injectors from firing...check it ...i had the same problem as you and it was the egi relay.....

[tiger]

ok thank you, I will check it out... I put a noid light on the first injector and it does not flash at all.. guess i'm having a problem with it. i'll let you know what my findings are!

[tiger]

Ok i tried using the multimeter, i set it to read Ohms. I placed the positive lead on the positive terminal of the battery and on the #1 injector connector, 2nd pin, I placed the ground lead... I got a reading of .583 k ohms .. and it was the same for the rest of the injectors. what does this mean?

now im not very smart when it comes to using a multimeter tool... the first time i was trying this.. I placed 2 small probing rods (made from safety pins) one in each pin and used both my positive and negative lead on the connector.. i got a very high resistance reading.. it would hang from 27-30 and sometimes spike at 40 and then my screen would say "O.L" whatever that means... can someone help me that knows more about multimeters?
Modified by tiger at 12:19 PM 10/5/2007