2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

88 vert ECU in 91 vert? possible?

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Old May 27, 2016 | 06:42 PM
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88 vert ECU in 91 vert? possible?

sorry for all the thread spam but i can get an s4 ecu for superrr cheap what would i have to do to make it work with my s5?
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Old May 27, 2016 | 06:58 PM
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It won't, that simple
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Old May 27, 2016 | 07:03 PM
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all i needed to know thank you
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Old May 27, 2016 | 08:15 PM
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Yes it's possible. Switch over to an S4 engine/harness
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Old May 27, 2016 | 08:57 PM
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the S5 airbag sensors are tied into the engine harness as well, so you'd lose those even if you decided you're a masochist.
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Old May 28, 2016 | 09:34 AM
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Originally Posted by DC5Daniel
Yes it's possible. Switch over to an S4 engine/harness
Have you seen his other threads? Don't encourage him or satch will go postal LOL
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Old May 28, 2016 | 01:09 PM
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you're really trying to bag on me? im here for help and its the quickest way to get it. i search before i post if i dont find anything helpful i make a thread
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Old May 28, 2016 | 02:16 PM
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Originally Posted by Brian Deane
you're really trying to bag on me? im here for help and its the quickest way to get it. i search before i post if i dont find anything helpful i make a thread

Lets all be less thin skinned and in the process we'll get over it.
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Old May 28, 2016 | 03:25 PM
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Originally Posted by satch
Lets all be less thin skinned and in the process we'll get over it.
thank you satch im only here for help not to talk crap
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Old May 28, 2016 | 03:39 PM
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Originally Posted by Brian Deane
thank you satch im only here for help not to talk crap
You misunderstood my point.
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Old May 28, 2016 | 04:20 PM
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oh you meant thin skinned to me...okay lol
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Old May 28, 2016 | 10:50 PM
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Originally Posted by RotaryEvolution
the S5 airbag sensors are tied into the engine harness as well, so you'd lose those even if you decided you're a masochist.
Masochist?..no..he's from NORTH CAROLINA..

**woops..got that mixed up with Massachusetts...Sorry!.lol,,carry on..
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Old May 29, 2016 | 01:11 AM
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Originally Posted by misterstyx69
Masochist?..no..he's from NORTH CAROLINA..

**woops..got that mixed up with Massachusetts...Sorry!.lol,,carry on..
i actually live in CT im in nc for a little bit :p
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Old May 29, 2016 | 07:42 AM
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Originally Posted by Brian Deane
i actually live in CT im in nc for a little bit :p
I am so sorry..
We will send you help as soon as possible to get you out of there..(hahhahahaa!)

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Old May 29, 2016 | 08:17 AM
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Originally Posted by misterstyx69
I am so sorry..
We will send you help as soon as possible to get you out of there..(hahhahahaa!)

NC is a nice area, Styx. Although no abundance of Benigan's, hockey, and maple syrup, so I can understand your disappointment.
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Old May 29, 2016 | 08:40 AM
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Originally Posted by Brian Deane
you're really trying to bag on me? im here for help and its the quickest way to get it. i search before i post if i dont find anything helpful i make a thread
you gotta work on your joke skillz too man, I wasn't bashin you
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Old May 29, 2016 | 01:50 PM
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From: https://www2.mazda.com/en/100th/
how many FC owners does it take to change a lightbulb?
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Old May 29, 2016 | 05:45 PM
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Originally Posted by j9fd3s
how many FC owners does it take to change a lightbulb?
About 50, because that the cumulative amount of loose change they can mangle up to BUY the lightbulb
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Old May 29, 2016 | 11:37 PM
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it's 25 for the FC, 50 for the FB, get it right.
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Old May 30, 2016 | 12:06 AM
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Originally Posted by j9fd3s
how many FC owners does it take to change a lightbulb?
Who the hell knows?
They are too busy workin on the damn car to change a friggin lightbulb!
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Old May 30, 2016 | 07:53 AM
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From the research I've done, a lot more components of the car are tied in to the S5 ECU, S4 has a lot more mechanical stuff, like the OMP for example. It's not going to work.
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Old May 30, 2016 | 04:58 PM
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From: https://www2.mazda.com/en/100th/
Originally Posted by PinkRacer
From the research I've done, a lot more components of the car are tied in to the S5 ECU, S4 has a lot more mechanical stuff, like the OMP for example. It's not going to work.
its a different connector, won't physically plug in
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Old May 30, 2016 | 05:49 PM
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well i wouldn't say it is impossible, but the AFM is completely different, though someone who was determined could rewire an S5 to work on an S4 ECU, perhaps even use the S4 AFM with a few wiring changes there.

but then there's a matter of premixing.

but the S5 vert ecu isn't all that rare, not like the good ole N370 which has quickly turned gold plated.

i probably have one in the shop, but i don't give my parts away for next to nothing anymore, so there's that.

Last edited by RotaryEvolution; May 30, 2016 at 05:52 PM.
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Old May 30, 2016 | 09:07 PM
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i just got a n351 for $40 ill be getting it within a few days ill post back if my problem is fixed. it all seems like its leading to the ecu and well it sat in water while the P/O showed me it ran and it idled for like 30 minutes. and i couldnt even pull any codes from it since the cel was on when it was running

Last edited by Brian Deane; May 30, 2016 at 09:14 PM.
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Old May 30, 2016 | 10:22 PM
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you can pull codes while the CEL is illuminated, its kinda preferred since you know a code is stored at that time. when you turn the car off any stored codes are erased and the cycle starts over.

by "stored" i mean this is old technology and there is nothing really stored longer than 1 ignition key cycle.
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