Author Topic: 1980 running like dog poo  (Read 1507 times)

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skin6061

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1980 running like dog poo
« on: Apr 11, 2012, 06:31:09 PM »
Quick run down.   1980 toyota   82-22r 95,000 miles,   New 20r head-268 cam about 1000 miles on after head was replaced.

I was coming home and the truck started to shutter, when i would step on the clutch it would die.  When i got it to fire it felt like it was running on only a few cylinders.  Once I got home i checked the timing--that's fine---checked the fuel system---that's fine--pulled the plugs---all look normal--replaced cap and rotor---no difference.   So i started checking into the Ignition control module and coil.  Here's where i'm stumped.   According to the Haynes manual i check the primary coil resistance  which are the 3 wires that come off the ICM and go to the coil.  According to the book it says it should be between 1.3 to 1.7 ohms.  I show it reading .6 ohms.  Next i check the secondary coil resistance according to Haynes it should be between 12.0 and 16.0 ohms.  It's  reads 13.0 ohms.   Now all these reading were done with the truck not running or the key in the on position.  The book does not say it should or should not be running or the key in the on position or not.     If i did this correctly which is what I hope is someone will tell me.. I assume the coil is good but my ignition control module is bad and needs replaced.

emsvitil

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Re: 1980 running like dog poo
« Reply #1 on: Apr 11, 2012, 06:54:49 PM »
Did you measure the coil resistance with the ignition module and everything else disconnected from the coil?
Ed
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86 SR5 XtraCab
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skin6061 [OP]

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Re: 1980 running like dog poo
« Reply #2 on: Apr 11, 2012, 06:57:30 PM »
No it was still connected to the ignition module was still connected to the coil like the Haynes manuals picture shows. 

H8PVMNT

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Re: 1980 running like dog poo
« Reply #3 on: Apr 11, 2012, 07:06:50 PM »
Try a different ignitor.  I had a similar problem and that fixed it. My old on checked out OK on the ohm meter too.
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skin6061 [OP]

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Re: 1980 running like dog poo
« Reply #4 on: Apr 11, 2012, 07:12:22 PM »
I would try a different ignition module but i dont have one, i did try another universal coil but it ran like poo with it on there too.

Slolyfe

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Re: 1980 running like dog poo
« Reply #5 on: Apr 11, 2012, 08:42:47 PM »
I would try a different ignition module but i dont have one, i did try another universal coil but it ran like poo with it on there too.

When my control module went out the truck would not fire. Dont know if that helps.
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skin6061 [OP]

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Re: 1980 running like dog poo
« Reply #6 on: Apr 12, 2012, 05:17:18 PM »
My truck is running again.  Not sure what caused the problem but i believe I had a leak around the carb somewhere. Re timed the motor, adjusted the air gap, re gapped the plugs and took the carb off and retightned all bolts.   Kinda odd that its working now since i'm not positive what caused the problem, i just hope the little gremlin does not show up again.

 
 
 
 
 

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