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Discussion Starter #1
OK im very new to supras as this is my first one. Im getting a code 14 right now and it calls that code 14 is ignition signal.

Now im lost, what exactly is it telling me needs to be replaced??, or what do i look for??

Oh by the way this is an 88 turbo 7MGTE. IT does run , just like shit at the moment.

PLease help and thanks
 
S

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Discussion Starter #2
Not a very common problem, but let's try to go over it.

The "IGF" signal is a feedback loop from the ignition coils back to the engine computer. It tells the computer if the coil didn't fire, when it was told to do so.

The problem can be anywhere in the line, from the computer to the coils.

I'd start with inspecting the connectors that lead to the coils and the igniter. Look for any frayed or broken wires, corroded terminals, missing grounds etc.

Then I'd check the coils:
http://www.cygnusx1.net/supra/library/TSRM/ig/IG_12.html

And if that doesn't work, the igniter.
http://www.cygnusx1.net/supra/library/TSRM/ig/IG_15.html

If you think you found something, clear your computer codes (pull out the EFI fuse for 30 seconds) and see if it comes back.

Hopefully this will get you started. Best Luck.
 
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Discussion Starter #3
Thansk very much man, i got checkin and i found it is the small ahrness htat leads to my coils. THe wires were all cracked, im looking for another one, btu for now electical tape seems to have fixed it for the time being.

THANSK AGAIN for shooting me in the right direction.
 

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Republican
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Man, Shawndude, without you our forums wouldent be half as good as they are! thanks for all your answers, Dude!
 

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anti-hardtopper#1
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i threw that same code, then i reset it and tried again and i throw code 51, and haven't seen 14 since?
 
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Discussion Starter #7
i'm now throwing code 51 and 14... gonna check some wires... any reason for the 51 to come along with the 14?
 

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Ronin
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unfortunately, the factory codes arent good for much more than giving you an idea of where to look. Also, toyotas are double grounded meaning when certain things go bad in one circuit they can trip other circuits and shoot other codes, which are nothing more than something to get your attention. Really the only way to debug it with a computer is to use a factory tool, which has a tree of tests to follow before hitting a conclusion. It would be easier to diagnose for most guys on this board i think, if you describe EXACTLY what the car does.
 
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Discussion Starter #9
There really shouldn't be any correlation between the code 51 and 14.

Code 51 is a very common problem. If your TPS is the original 15+ year old one, I'd strongly suggest replacing it with a brand new unit if you can afford it.
http://www.cygnusx1.net/supra/library/EPC/MKIII_NATO/parts/89452.html

It however needs to be adjusted properly to function, but this won't fix a broken unit.
Adjustment instructions:
http://www.cygnusx1.net/supra/library/TSRM/fi/FI_103.html
http://www.cygnusx1.net/supra/library/TSRM/fi/FI_101.html

Your linkage must also be free to fully close, so lubricate it and make sure it isn't seized.

For the code 14, I would start by having the car idle, and wiggling and moving all the related wiring. Usually when you find the bad connection, the engine will die, or stutter or change the RPM or something.

Then I'd check all the voltages and grounds as shown in the TSRM. After that I would go get drunk, to forget about my troubles. :)
 
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Discussion Starter #10
The engine light comes on and it seems like the engine stalls for a split second and keeps running... then when i check the codes, 14 comes into play... a day ago, the car acutally stalled... but befor so, the car seemed to hesitate and bog... then i checked the code again... and it was 14... I'm assuming it's either a bad wire, igniter or coil pack... but the problem is soo intermitent that i'ts tough to pinpoint....

if someone had the same problem please speak up and let me know what you did.... other than selling the car... LOL

cheers!
 

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Ronin
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id be more inclined to think its in the wiring, a connection, i cant remember the last time a toyota coil pack or ignitor was bad. like shawn said, let the car run, and wiggle all the wires you see, start near the throttle position sensor and the idle air control valve, as those connections tend to get jostled quite often. then tell us what makes the car act funny when you pull on it.
 
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