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Old 08-14-2019, 06:32 AM   #1 (permalink)
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Default Ignition problems. model identification / need FSM

Hi everyone,

I've spent the past 3 days trying to diagnose and fix a problem with my Suzuki Sierra with little progress. What do you guys think is buggered with this thing?

The car is a 1990 Suzuki Sierra JX. 1298cc G13BA Carby.
Vin is JSA05SJ70 000305762 im unsure how to break it down.
I starting to suspect the car has had a engine swap

A week ago i tried starting it and it just kept cranking over, it has fuel but no spark. I check all fuses and relays and cant find them/the 1 i can find isn't blown, I figured its old so i moved on, i then traced the no spark back to the ignition coil, it is looking pretty sad and wasn't producing a spark so i replaced it, spark plugs and the battery. Tested it and it still has no spark. So i thought i would look inside the distributor and test the Generator and Igniter. Here's where i'm stumped, i dont know how to test if the distributor is working and cannot find a Workshop manual that matches my wire colors or exact parts. On the link below i have followed the Ignitor test but i dont trust the FSM because things aren't matching.

Can someone either guide me to a working link to the FSM/wiring diagram or help solve this no spark issue.

helpful points are
the closest FSM i found is http://www.acksfaq.com/HTML/pdfs/198...SamuraiFSM.pdf
The coil will spark after i stop cranking and switch the key back to the On position, this causes the engine to shake slightly, seems like 1 signal of spark is firing a cylinder.
Generator has an acceptable resistance as per http://www.acksfaq.com/HTML/pdfs/198...SamuraiFSM.pdf
The Ignitor in the FSM is not accurate to my Ignitor, (link to mine below) can anyone confirm if i can still do the test on my Ignitor or will i need to find an accurate workshop manual? https://forum.suzukiclubuk.co.uk/viewtopic.php?t=10902
My Ignition barrel colors are W/B, B/W, B/Y, W. Should i be taking these colors from the Ignition Barrel or the Loom?


Please help!!! I've never been so frustrated trying to find a free or paid workshop manual!
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Old Yesterday, 12:49 AM   #2 (permalink)
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Default Voltage update!

Battery reads 12.72v
10.23v at coil with Ignition On
8.9 - 9.3v at coil with Ignition Start (Cranking)
12.6 v at the Ignition barrel main power feed and drops to 11.62v at Ignition barrel once turned to On position

I doubled checked the Vin and i have added a 5 in by accident it should be JSA0SJ70 000305762.
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Old Yesterday, 04:49 PM   #3 (permalink)
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You have power on the run position, but not on the crank (start)...
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Old Today, 12:19 AM   #4 (permalink)
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Hi Aqua,

On another forum a fellow suggested the following and these were the results.

Hi Woody
From what you are describing it sounds if you have a ignition switch issue .Try running a electric cable from the battery positive and connect direct on the plus side of your coil . Then try and start it .

My reply is below, does this mean it isnt the ignition switch?

Hi Smarty,

thanks for the help

I just followed your test and still no spark.

It might be worth noting that the key is worn out and falls out of the ignition barrel. I previously thought this may have caused the issue so i pulled apart the barrel a few days ago and it is worn but functional, i didn't do a continuity test but did do a voltage test and it was reading voltages once at each stage of ignition ACC, ON and start, so it seemed to be working. the key barrel is separate to the ignition switch so it cannot be the key.
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