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Discussion Starter #1
So my Sami quit.
Has spark, has fuel coming out the return, has cam motion.
After taking the timing belt cover off it has near new unbroken belt.
Mechanic says its the ECM.
Took the ECM out of a good running 88.5, won't match plugs.
Many differences between the 91 & 88.5.
Looks like same as buddies 91 Tracker.
Will they interchange ?
Any other interchange possible ?
Does the forum guy rebuild the 91 as well as the 88 he advertises ?
Is the build as good as a new one ?
Other than changing the whole TBI carb to a non-TBI is it possible to
by pass the ECM and run the 91 on the carb from an 87? How about
just changing the head from the 88 and leave the ECM out of the
system entirely, will that work ?
Anything that will spoil the different ECM once it is installed ?
 

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Discussion Starter #2
ECM Sami

Ok so After exchanging the Tracker ECM with the Sami
one no change.
After changing the whole Fuel injection system with the
Tracker still same. The primary starts but does not
sustain so sputters. Once back on the Tracker it works.
Since they behave the same, that is work on the Tracker
but not on the Sami, would it be some electrical fault after
the ECM and before the Fuel injecting module ?
There was a slight electrical smoke/burn stench in the cabin,
when it sputtered to a stop.
Could it be the fuel pump not putting enough fuel pressure
into the system to continue to run ?
Could it be the wire to the main run system ? How would
that single wire be located...sorry cannot read those wiring
charts in the back of my manual...not patient enough ?
If fuel is sprayed down the venturi it runs on until that spurt
is gone. Ack can you help me out here ? Enjoy your words.
 

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as far as running without the ECM, the hitachi carb can not. It's got too many vacuum switching valves that require the ECM checks and balance system to operate. You could probably run it off of a Weber or other purely mechanical carb. You still need the ECM for the charging system, but you could probably get it started and running without that.

as far as your issue with the TBI, if you have fuel going to the TBI (supply line is spitting fuel) and the vehicle runs when you dump fuel into the throat. good chance your injector is not putting the fuel into your throttle body. Check and see if it's getting a signal. If it's getting a signal, see if it's opening and releasing fuel. It could be clogged or sticking closed.

I don't have much experience with the TBI's so this is just pure speculation... hope someone with more experience in the TBI units can help you.
 

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Discussion Starter #4
ECM back repaired

Takes time and money.
Also knowledge and the correct tools.
So what is learned:
The 91 has a unique ECM not exchangable with
the 91 Track/Kick.;
Not available new in my area off the shelf,
might take a month if in NADA, much longer
if dealer needs to go to Japan. ($1100)
This one was repaired in 1999 and now again.
Not subject to recall.
If the ECM did not run other electronics, it
would be bypassed in a heart beat and
replaced with Mikuni/Harley side draft.
Dealers know little about the system and
urged me to junk it and upgrade to another
4x4.
So now the confidence in the rig is waning,
thinking of going back to my 87 with no ECM.
But that EFI is awesome for sure.
 

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I can test/repair your ECM, PM me for details.
 

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I know i've heard of, seen people that repair the ecm's like rhinoman does. The components on the boards are low grade and get fried over time. I'm wondering how long my ECM still has before it's circuit board gives up the magic puff of smoke that makes it work. Some day I may be sending my ECM to Rhinoman, but I will never give up on my Zuke.
 

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About 10 years is the useful life of the caps. the quality isn't the problem its just that you have a lot of fast current switching in that circuit and the power dissipation in the caps is relatively high.
Modern caps are an improvement but even the top quality Nichicon capacitors have a rated life of around 11 to 12 years and if they aren't used at all then the life expectancy can actually be worse. I don't recall the last time I saw a Track/Kick/Vit ECU that hadn't been repaired previously, other than an 89 that had a large hole in the PCB.
 

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Discussion Starter #8
ECM rebuilt

This one was rebuilt in 1999.
So guess there was a bonus to 2013.
So Rhinoman can you sell without a core for the
figures you gave 75 British pounds + postage to Canada ?
The unit has several number codes on it...can
supply those. My understanding is that this one
needed for 91 Sami it unique to that year.
Don't know how to send a PM.
The plan is to carry a spare with the idea that
once there is a spare on board won't ever need it.
Thanx for your response.
 

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I can sometimes modify an ECU to suit the application, the majority of these ECUs area standard design used in several markets and they change a few parts to create a specific ECU. I do have a few Euro spec Samurai ECUs but they are from later years, the PCBs usually are all the same from 91 through to 98 but if the software is different and the original PCB is too badly damaged then I would need to swap the original processor to the replacement PCB.
You can contact me at:

[email protected]

I can't sell for that price without a core because I would then have to source another ECU myself.
 

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In the US samurais, the only ECMs that directly interchange are 90-93 samurai ECMs (I suspect it is the same for canada). The 94 and 95 samurais have a little different engine sensor setup. So while the 94 and 95 samurai ECMs will run a 90-93 samurai, the check engine light will be on constantly, because the ECM doesn't see the extra sensors that the 94/95 samurais have.
As you have found, a trackick ECM will not run a 90-95 samurai, even though the plugs will fit.
The best (cheapest) option is usually to get the ECM repaired. As long as the damage isn't too bad on the circuit board, from the leaking capacitors, the ECMs can usually be fixed.
You can look at buying a used ECM, but they usually need to be repaired too, at some point. Plus, most used samurai EFI ECMs sell for around $200.
Buying a brand new ECM isn't usually a viable option.
 
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