Coilpacks not firing on #1 and #2...

ONLY for ADVANCED technical discussion about the 240sx!
Boney
Posts: 28
Joined: Tue Nov 01, 2005 8:30 am
Car: 1992 S13 240sx - 2003 turbo Spec V - 2006 Acura RSX-S
Contact:

Post

OK, this is about my last draw with this car... I have been working on it everyday for the last month or so. Its a 92 hatch that had an SR in it already with bad compression and it ran on 2 cylinders when i got it. I got a fresh redtop from heavy throttle and have been transferring everything over. I finally finished a few days ago and I fired it up yesterday.

It was idling very sluggish and sounded very familiar to the other motor... I set TPS voltage, and then I tried to set timing and my timing light wasnt picking up a signal. I tested the coilpacks and #1 and #2 arent even firing!! Exactly like the bad motor. So either wiring is bad somewhere, the ignitor is bad, or the ECU is bad??? These are different coilpacks than the old SR. Anyone have any ideas??


180fan
Posts: 7799
Joined: Sat Dec 14, 2002 12:16 pm
Car: 89 fastback

Post

test the ignitor. if the ignitor is ok, then check the cas.

Boney
Posts: 28
Joined: Tue Nov 01, 2005 8:30 am
Car: 1992 S13 240sx - 2003 turbo Spec V - 2006 Acura RSX-S
Contact:

Post

Whats the best way to test the ignitor?

Boney
Posts: 28
Joined: Tue Nov 01, 2005 8:30 am
Car: 1992 S13 240sx - 2003 turbo Spec V - 2006 Acura RSX-S
Contact:

Post

Ok, i tested the coils and its not them. All 4 are working bc I switched them around and 3 and 4 are still only firing. I took the coilpack harness out and tested for continuity and its all fine. I also got a new ignitor and it didnt do anything. So they arent getting a signal. So its either my ECU or harness, correct?

shifty
Posts: 2
Joined: Sat Apr 22, 2006 4:26 pm
Car: 1990 240 sr hippo sleek g-fx racing hearts lotsa blitz n greddy stuff daytona blue

Post

I went thru the same on mine when i first put it in it was the ecu. after swapping ignighters with a friend and coil packs around.

180fan
Posts: 7799
Joined: Sat Dec 14, 2002 12:16 pm
Car: 89 fastback

Post

easier to take a multimeter on the ignitor and test that first. there was a thread on that in the RWD-SR board a while ago.

Boney
Posts: 28
Joined: Tue Nov 01, 2005 8:30 am
Car: 1992 S13 240sx - 2003 turbo Spec V - 2006 Acura RSX-S
Contact:

Post

yea i did and got no beeps so i thought it was bad... i got an ecu coming so we'll see...

Boney
Posts: 28
Joined: Tue Nov 01, 2005 8:30 am
Car: 1992 S13 240sx - 2003 turbo Spec V - 2006 Acura RSX-S
Contact:

Post

Now why would my coilpack harness and engine harness have the wires going to the coils from left to right as Ground, Positive, ECU; and on my coils it says ECU, Positive, Ground? Either I got the wrong coilpack harness or the wrong coils, both of which didnt come from my last engine, harness, or this engine.



Modified by Boney at 12:47 AM 4/29/2006
Modified by Boney at 12:56 AM 4/29/2006

Boney
Posts: 28
Joined: Tue Nov 01, 2005 8:30 am
Car: 1992 S13 240sx - 2003 turbo Spec V - 2006 Acura RSX-S
Contact:

Post

EDIT: Wrong Post
Modified by Boney at 12:26 AM 4/29/2006

Boney
Posts: 28
Joined: Tue Nov 01, 2005 8:30 am
Car: 1992 S13 240sx - 2003 turbo Spec V - 2006 Acura RSX-S
Contact:

Post

Ok its not the coil harness, got my engine harness rewired, put it into another redtop s13 and it works fine... Still my car is messed up. I'm 100% sure its the CAS... it was in the old motor which is beat and has 80k+ miles on it. So i got one coming, does this sound like thats it?

180fan
Posts: 7799
Joined: Sat Dec 14, 2002 12:16 pm
Car: 89 fastback

Post

yeah sounds like you nailed it.


Return to “240SX Technical Forum”