1990 Tracker crank no start

2899 Views 62 Replies 8 Participants Last post by ViewSonic, 2 mo ago

ViewSonic

Discussion Starter · 3 mo ago

I have a 1990 tracker with the 5 speed manual and 4x4. The other day I was idling in my tracker and it just shut off. After getting a tow I did a lot of research on here and I keep coming to dead ends.

My issues so far are as follows:

-No fuel coming from injector yet the fuel pump is ok after testing it. Fuel is getting to the throttlebody
-Noid light test gave no pulse signal.
-Tach is not moving when cranking over the engine.
-Engine will only run off starting fluid. Tach will work when the engine is running off of starter fluid.
-ECM is repeatedly flashing code 12- flipping that hidden switch does nothing.
-TPS readings are within normal limits.
-Injector is within spec

I had new capacitors put on my ECM and im still having these issues. Should I just spend the money on a new ECU?
Any help would be appreciated thanks.

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Bex

· #9 · 3 mo ago

If the noid test gives no signal, it is possible that the injector driver in the ECU has fried (and can be replaced). Normally this will happen due to a short in the injector wiring. Before trying to find a new ECU, open your ECU up and take a look.
See post #6 here, and follow the top link in that post (bottom link won’t work)

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No noid When Loaded

Good Day, I`m working on My son`s 92 8v, auto, 4x4, 2dr, tracker. I`ve read the kick fix pages (very helpfull). I have noid light when connected only to the plug, No noid light when the injector is connected as well. Is it safe to Assume I`ve lost 1 injector driver on the ECM? I`ve tested...

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Bex

· #11 · 3 mo ago

Open up your ECU, and first see if the original Rubycon capacitors are still there. Some people have advised that they still get the code 12, even though one or two of the caps have failed.
Regarding the injector drivers, you are looking for Q101, etc.

Passive circuit component Circuit component Electronic instrument Hardware programmer Electronic engineering

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Bex

· #14 · 3 mo ago

I don’t know much about this either, other than the fact that I have had what potentially may be a similar situation. Start reading here at post #21…..regarding the tests I was instructed to do

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electrical short??

I had originally made an appointment with my mechanic as I had a short somewhere in my 91 Tracker. It started with the radio cutting out when I put on the brakes, indicators or hit a bump. Then the brake lights stopped working completely. In the meantime (when it rains, it pours) my ECU went...

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Reactions: 1

Bex

· #16 · 3 mo ago

Finding a 1990 ECU might be a bit of an adventure. If you are unsure how to check to see if the injector drivers are good or not, most computer geeks will be able to do this….they’ll be able to check your caps and board, as well.
And going back to Fordem’s advice in post #2, when you are cranking, you’re advising you get a code 12. The way Fordem’s test works is that when you stop cranking, you leave the key in the on position, and then check to see if the code changes to 41 or 42. Did you leave the key on??

Bex

· #22 · 3 mo ago

fordem said:
To be honest, I don't see any "local electronics repair shops" as being willing to take on motor vehicle ECU repair work, it's more of a specialist field.

Perhaps a moot point now, but the computer ‘geek’ in my local town was able to replace my caps, test and replace the injector drivers, clean the traces, etc., in my ECU, as well as make a recommendation to run an inline inline fuse in the injector wiring circuit so that, if the injector wires caused more problems, the fuse would blow well before any damage to the ECU. Then again, he was building computers, and not just some guy in an electronics shop.

Reactions: 2

Bex

· #25 · 3 mo ago

On the red injector wire, between the injector and the ECU, just after where it goes through the connector shared by the TPS.

Reactions: 1

Bex

· #32 · 3 mo ago

Sadly, most of the guys on ebay that do a repair and ‘core return’ won’t work on the 89/90 ECU’s, AFAIK.

Bex

· #39 · 2 mo ago

Where are you checking for voltage? Check both at the TPS, as well as at the ECU connector. The TPS voltage at the ECU connector is meant to be only about 1v, with the key on or the engine running, according to my FSM. Your gray wire should connect on the yellow connector of the ECU.
So, even with the new ECU, you are not getting the pulse with the noid test? Have you tried just running new wires from the ECU to the injector?

Bex

· #46 · 2 mo ago

You advise in post #36 that your noid test still fails….correct? No signal? Have you tried running new wires from the ECU to the injector??

Bex

· #49 · 2 mo ago

There was a recent post around here somewhere, where someone did an ‘old school’ cleaning of his injector. I suspect that if your fuel filter was so gunked up, the 10 micron screen on the injector is probably the same. I‘ll see if I can find the post I’m thinking about……

Bex

· #50 · 2 mo ago

Post #32 here:

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Carb conversion

Hey everyone. More or less new to suzuki trackers. My son and i bought and old beater tracker. 1994 5sp manual in canada with at 1.6L 16v. We just put a new fuel pump in it because that one that came with it was burned right out. The truck runs like crap. Starts and idles not to bad when...

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Bex

· #52 · 2 mo ago

Hope it helps…..it’s certainly worth a try, rather than sending the injector out for professional cleaning.

Bex

· #54 · 2 mo ago

Do the noid test at the ECU connector itself to see if the ECU is pulsing. If there was a wiring problem with the injector, then plugging in a new ECU and cranking would have fried the driver in the new ECU as well.
I don’t have the FSM for the 1990, but take a look in your engine at the ignition coil. If there is a brown/white wire coming from the coil, follow that….it should lead to both the igniter and the noise suppressor.

Bex

· #59 · 2 mo ago

I’ve read through this again….on #45, you say that the injector is working, but then in #53, you advise no pulse??? I’m confused……

Bex

· #62 · 2 mo ago

Thanks for the update, and glad you finally got this sorted.

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