sr only gets spark on 1st cylinder

[fairladysx_s13]

I used to have a tuned ecu that came with the engine i swapped in 2 months ago and it ran fairly well but way too rich. All cylinders were firing. i got another ecu becuase i didnt need a tuned one already since i have a stock set up basically, just bolt ons. i plug the new one in and it doesnt start. I start with spark and fuel. i have fuel but i only get spark from the 1st cylinder. i switch coils and no matter what coil is plugged into the harness for cylinder 1 it will always spark. on cylinder 2 3 and 4 i dont get any spark at all. Anyone have any ideas? I think i got another worthless ecu.

[180sx_Drifter]

maybe you got the wrong ecu? try another ecu and see if anything changes.

[fairladysx_s13]

i would try that but i dont kno anyone with an sr swap around by me and i dont want to order one. whats the difference between ecu's? i used to have a number 62 ecu. idk what thiis one is because the number was scratched off. but i kno there are different number ecu's.

[180sx_Drifter]

correct me if im wrong but i believe 62 is for redtop and 5 is for blacktop? dunno if it matters but im pretty sure if you search more you will find the right answer.

[duffman1278]

I'd bet my money on the ECU, for sure.

[fairladysx_s13]

yea i have a redtop. E5 i believe is blacktop. well i guess im ganna try another ecu and see what happens.

[driftin_180sx]

what number is on the new ecu. Sounds like you have a Kouki ecu. If you are trying to run a kouki ecu you will only get spark on number one because the wiring pinout are different.

[fairladysx_s13]

like a #63 ecu instead of a #62? How can i tell the difference? half the sticker is scratched of so idk what ecu it is. the 2 codes still on the sticker is A18-F80 G20 then theres the 2371060F10. All i kno is i have a stock redtop sr20 and i need the ecu to go with it.

[duffman1278]

For redtops it doesn't matter, 62 or 63 is fine.

[fishhouse]

e5 and 62/63 should work, j4 will cause it to fire on one cylinder.

[nrg]

maybe the tuned ECU was a J4 (kouki s13) ecu and the previous owner had the harness repined for it. And now you're trying to use the 63 (redtop) ecu and it's not working. check the harness and repin if necessary.

[broken_s13]

I Had the same problem a while back when i did my first sr swap. turned out i had a bluebird ecu.

[DDSR240]

ITS YOUR IGNITER CHIP.....trust me if your ignighter chip is not protected from heat its more prone to fail get a new one, relocate it to a cooler spot or put some heat reflective tape on it and this one will last 4 times longer.

[Landers]

^^^^ Couldnt agree more...Its your ignitor chip brotha! Replace it or check wires in their connections and your car should run.

[sr20det drift]

i agree on the ignitor chip

[fairladysx_s13]

i kno exactly whats going on now. The tuned ecu was a number 62. This is the ecu im suppossed to use because its a 91-94 redtop m/t. The second one i received has to be a j4. I opened it up and compared it to a fried #62 ecu i have and its completely different. Ived read using the j4 will cause to fire on the first cylinder. Im waiting for the new 62 i ordered so we'll see what happens. Im 100% positive its not the ignitor. Thanks for the ideaas though.

[jskateborders]

you coulda just repinned your harness. Sorry I was too late. If your still interested, pm me, it takes like 5 mins.

[jskateborders]

if not, wanna sell the j4?

[fairladysx_s13]

ill sell it. It was the wrong ecu. Cars running great. The sticker is damaged and u cant see it saying j4 but u can see the bottom of the 4 because all the other ecu's numbers arnt just a line down it.

[errolorion]

open up that ecu and check all the internals look for fryed circuits
check your injectors

[fairladysx_s13]

The problems been solved. It was the wrong ecu.