91 240SX Nissan ECU - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Troutman2 · 12-10-2008, 10:18 PM

My ECU shorted out. I am looking to buy a used one, NO. A11-B47 G1O, (27). It is a Calif. car. The used ECU has the same numbers except for the one in the bottom right corner of the green tag. Mine is OX30. What is the significance of this number? Do they need to match?
I would appreciate any help.

Thank you

blackrms13 · 12-10-2008, 10:37 PM

Quote:

Originally Posted by Troutman2

NO. A11-B47 G1O, (27)

stands for a 1991 KA24DE Auto ECU
and #27 is from Cali
I used have #27 and now using #29, a Non-Cali KA24DE Auto ECU

for it to work, no it dont have to match
but some minor details might be little different

180sx Fan · 12-10-2008, 10:45 PM

from what ive heard the only difference between auto and manual ecus is that the auto one does not have a speedlimiter. Never checked this myself so im not sure about this.

s13Carlo · 12-11-2008, 01:57 AM

yea auto ecu have to speedlimiter and im not sure but i think they are better on gas while cruising there is no big differences between any dohc oem ecu, i have a 5 speed one sitting in my garage

tre4s13 · 12-11-2008, 04:44 AM

So what exactly IS the black print's purpose??

Troutman2 · 12-11-2008, 11:35 AM

Quote:

Originally Posted by tre4s13

So what exactly IS the black print's purpose??

That was my original question. I don't think it matters.

ZenkiKid · 01-16-2009, 10:46 AM

sorry to bump this but i didnt want to make a new thread, is there anywhere where i can identify dohc ecus? and is it true youll get a CEL if you run an auto ECU on a 5 speed setup?

bbejj123 · 01-16-2009, 11:20 AM

back when i had my 240 it was a 5 spd i bought an ecu from an auto at the junkyard... it has a better fuel map and has no speedlimiter allows you to rev to 7k and no stop at 115
well worth it in my opinion and my cel never came on that may have been cuz it was taken but im not completely sure but either way you might as well take yours out unless you really want it

projectRDM · 01-16-2009, 11:39 AM

The fuel map is NOT different on an auto ECU. You may think it was, but it's not.

On an S13 you can pretty much use any 91-94 ECU, auto or manual, Federal or California, if it's a manual chassis. Autos of course require an auto ECU.

For S14s you can use any 95-98 ECU but for 97-98 ECUs in a 95 chassis you need to repin for wires, same for swapping the other way, a 95 ECU into a 97-98 chassis.

12-10-2008, 10:18 PM	#1
Troutman2 Join Date: Dec 2008 Location: California Posts: 10 Trader Rating: (1) Feedback Score: 1 reviews	91 240SX Nissan ECU My ECU shorted out. I am looking to buy a used one, NO. A11-B47 G1O, (27). It is a Calif. car. The used ECU has the same numbers except for the one in the bottom right corner of the green tag. Mine is OX30. What is the significance of this number? Do they need to match? I would appreciate any help. Thank you

01-16-2009, 11:20 AM	#8
bbejj123 Zilvia Junkie Join Date: Nov 2007 Location: La Crescenta Age: 35 Posts: 482 Trader Rating: (0) Feedback Score: 0 reviews	back when i had my 240 it was a 5 spd i bought an ecu from an auto at the junkyard... it has a better fuel map and has no speedlimiter allows you to rev to 7k and no stop at 115 well worth it in my opinion and my cel never came on that may have been cuz it was taken but im not completely sure but either way you might as well take yours out unless you really want it __________________

01-16-2009, 11:39 AM	#9
projectRDM Post Whore! Join Date: Dec 2002 Location: Atlanta Age: 51 Posts: 13,812 Trader Rating: (12) Feedback Score: 12 reviews	The fuel map is NOT different on an auto ECU. You may think it was, but it's not. On an S13 you can pretty much use any 91-94 ECU, auto or manual, Federal or California, if it's a manual chassis. Autos of course require an auto ECU. For S14s you can use any 95-98 ECU but for 97-98 ECUs in a 95 chassis you need to repin for wires, same for swapping the other way, a 95 ECU into a 97-98 chassis. __________________ FORMERLY R240NA Learn what's really going on and protect your assets now before they're gone forever: www.paypalsucks.com

12-11-2008, 01:57 AM	#4
s13Carlo Leaky Injector Join Date: Feb 2008 Location: 805 Posts: 105 Trader Rating: (0) Feedback Score: 0 reviews	yea auto ecu have to speedlimiter and im not sure but i think they are better on gas while cruising there is no big differences between any dohc oem ecu, i have a 5 speed one sitting in my garage

12-11-2008, 04:44 AM	#5
tre4s13 Zilvia Junkie Join Date: Oct 2008 Location: Winston-Salem, NC (336-926-0641) Age: 41 Posts: 323 Trader Rating: (6) Feedback Score: 6 reviews	So what exactly IS the black print's purpose??

01-16-2009, 10:46 AM	#7
ZenkiKid Post Whore! Join Date: Nov 2005 Location: Nowhere Age: 35 Posts: 3,285 Trader Rating: (9) Feedback Score: 9 reviews	sorry to bump this but i didnt want to make a new thread, is there anywhere where i can identify dohc ecus? and is it true youll get a CEL if you run an auto ECU on a 5 speed setup?