KL31 or KL36 ecu

mx3man83 · Post by **mx3man83** » January 8th, 2004, 8:28 pm

Which ecu should I buy? Does it make a difference if i have the straight neck KLZE or the curved neck manifold? Thanks.

Gro Harlem · Post by **Gro Harlem** » January 8th, 2004, 8:56 pm

KL-31 = 5speed model KLZE ecu
KL-36 = automatic model KLZE ECU.

I"m using a KL36, works good, but my motor is also from an automatic car.

I don't know if the ecu's tuning is any different. I do know that the KL36 has extra circuitry for the auto tranny brain or whatever it is called. PPL on probetalk believe they are "identical in every way" But until I see some kind of fuel curve maps that someone pulls off each, I won't believe it.

On lots of cars, the automatic ECU's are tuned less agressively to prolong the life of the tranny and to prevent warranty claims....so i wouldn't be surprised if it was detuned a little bit.

babyblueMX3 · Post by **babyblueMX3** » January 8th, 2004, 10:40 pm

Originally posted by Gro Harlem:
KL-31 = 5speed model KLZE ecu
KL-36 = automatic model KLZE ECU.

mmm...i always thought that klze came with atx only...never heard of someone that got a manuel tranny with their ze's..might be wrong tho

i personnaly have the kl36 ecu and works great

Taras · Post by **Taras** » January 8th, 2004, 10:42 pm

Funny thing that both have same Mazda part number. May be it is a year to year variation. Some say that both 5spd and Auto cars could come with either. Not sure on the tuning thing though.

killerpickle · Post by **killerpickle** » January 9th, 2004, 1:01 am

the mx6 had a klze in europe I believe...that would explain the 5spd

Steeb · Post by **Steeb** » January 9th, 2004, 4:01 am

ze's come in mtx and atx.

IanL · Post by **IanL** » January 9th, 2004, 5:14 am

Originally posted by killerpickle:
the mx6 had a klze in europe I believe...that would explain the 5spd

The European MX-6s have KLDE engines. The KLZE is only sold to the Japanese Domestic Market. However, I understand that JDM MX-6s were available with MTX - that may apply to 626s as well.

Millenias are ATX only, but they are not the sole source of KLZEs.

mx3man83 · Post by **mx3man83** » January 9th, 2004, 3:10 pm

Well, i've heard a couple of people that the kl31 is for the mtx. Maybe the kl36 will work as well, i don't know but, I'm going with the kl31. Thanks guys.

Taras · Post by **Taras** » January 9th, 2004, 10:30 pm

Hmm... my engine came out of 1995 Eunos 800 with curved neck manifold and had MTX flywheel on it. I guess in Japan anything is possible.

IanL · Post by **IanL** » January 10th, 2004, 5:25 am

I expect that flywheel was fitted after the engine was removed from the 800.

gsrbomb · Post by **gsrbomb** » January 10th, 2004, 4:31 pm

The manual tranny from Mazda6 V6 comes from some japanese eunos 800 5 speed.

I talked with a guy in australia with a KLZE Baja . He as bought a jdm Mx-6 front clip (manual). and i asked them for the ecu number and it shows KL36.

Long neck IM, KL31 Cams.

Vaf: JE50

Gro Harlem · Post by **Gro Harlem** » January 11th, 2004, 9:56 am

hrmm that could also be it. Guys on PT say that the kl36 is atx and kl31 is for mtx, but hell, maybe it has to do with which camshafts your motor has.

HOpefully this isn't the case, because I have the long-neck KL31 version, and am running a kl36 ecu

gsrbomb · Post by **gsrbomb** » January 11th, 2004, 2:42 pm

Long neck KL31 version ? You have a curved neck in your pics.

Don't believe all the things you see on PT ...

The cams doesn't make influence on ecu no.

MX-3.com

KL31 or KL36 ecu

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