Author Topic: First gen Emission control box fix!  (Read 2273 times)

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CrazyYota

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First gen Emission control box fix!
« on: Sep 20, 2013, 12:17:49 PM »
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       If you are having idling problems with your first gen Toyota then you need to take a look at the emissions control box. Over time some of the joints on the circuit board will break loose causing a bad connection. I am going to try to show you guys how easy it is to fix.  :thumbs: You are going to need a soldering iron, 63/37 rosin core solder, rubbing alcohol, and a toothbrush. 




The box





The problem area





This is the connection on the front that breaks

 




You can see all the fine cracks in the solder joints.












Take your toothbrush and apply some rubbing alcohol to it and brush it over the broken solder joints. This helps remove any dirt or old flux on the joints.








   When they are nice and clean take your hot iron and tin it (tinning). To properly tin your iron you heat it up apply some solder to the tip and then gently wipe it on a wet sponge to spread it evenly over the tip. Tinning the iron helps remove oxides and helps spread the heat to the joint.
   Then take your tinned iron to the first broken joint and heat it up and add your solder. It should take you about 2-3 seconds per joint. Any longer and you can burn up the circuit board. Also remember to wipe your iron on the wet sponge after every joint to keep it clean and remove oxides. They should be nice and shiny when you are done.

You can see the left side all done.

 



All done! :biggthumpup:







My fancy tools!  :haha:







« Last Edit: Sep 20, 2013, 04:04:02 PM by BigMike »
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CrazyYota [OP]

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Re: First gen Emission control box fix!
« Reply #1 on: Sep 20, 2013, 12:21:42 PM »
Here is a pic of one a smog shop charged my dad $300 bucks to fix! :shocking: Looks like it got a little hot! I think they used the wrong solder and flux. So save yourself some money and fix it yourself! :biggthumpup:

 
>Chuck Norris invented black. In fact, he invented the entire spectrum of visible light. Except pink. Tom Cruise invented pink.

rattlers

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Re: First gen Emission control box fix!
« Reply #2 on: Sep 20, 2013, 01:09:04 PM »
hello thanks for the write up, do you know if the 85 4runner has one of these boxes or simular and where its location is.  thanks
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CrazyYota [OP]

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Re: First gen Emission control box fix!
« Reply #3 on: Sep 20, 2013, 03:54:49 PM »
I think the 85 had them on the passenger side kick panel where the computer for the EFI would be.  :biggthumpup:
>Chuck Norris invented black. In fact, he invented the entire spectrum of visible light. Except pink. Tom Cruise invented pink.

BigMike

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Re: First gen Emission control box fix!
« Reply #4 on: Sep 20, 2013, 04:07:06 PM »
Nice write up and pics CrazyYota! :clap2: I added this thread to our main Tech page :thumbs:

BigMike
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CrazyYota [OP]

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Re: First gen Emission control box fix!
« Reply #5 on: Sep 20, 2013, 09:42:53 PM »
Nice write up and pics CrazyYota! :clap2: I added this thread to our main Tech page :thumbs:

BigMike

Sweet! I hope it helps keep another first gen going!  :driving:
>Chuck Norris invented black. In fact, he invented the entire spectrum of visible light. Except pink. Tom Cruise invented pink.

Rokntoy

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Re: First gen Emission control box fix!
« Reply #6 on: Oct 19, 2013, 09:30:09 PM »
I had forgot about that thing and mine is running rough Thanks for the fix!
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