Interesting...

Topic: Interesting... (Read 2041 times) previous topic - next topic

Interesting...

December 14, 2012, 11:21:10 PM

Well to me anyway. I took my TFI off my distributor just to check resistances, and it came out good. Then I pulled the EEC out again and looked it over for any visual defects (hot spots). It's 26 years old so I thought I would replace the three electrolytic Nichicon 47uf, 10v capacitors being they do go bad with time. Two were right in the ball park, but one was getting a reading of 3.5uf. I replaced them all with new Nichicon 47uf, 100v, (plenty good). So tomorrow I will hook it back up and see what happens.

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Reply #1 – December 14, 2012, 11:25:22 PM

Was it having issues that led you to do this?

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Reply #2 – December 15, 2012, 09:46:48 AM

I've had several strange electrical issues with this car. I believe more in "better safe than sorry" than "If it works don't fix it".

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Reply #3 – December 15, 2012, 02:15:03 PM

What type of issues?

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Reply #4 – December 15, 2012, 04:35:45 PM

Mainly timing. It would run at 10 degrees ATDC smooth and powerful, but when I moved it to 10 degrees BTDC it would run rough and smoke. The plugs would also turn black. Strange!

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Reply #5 – December 15, 2012, 07:07:52 PM

Should be interesting to see if that fixes it.

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Reply #6 – December 15, 2012, 08:34:39 PM

I went to a local auto store to buy a re-manufactured one about a month ago and they wanted $99.00 for it and $76.00 for a core. There also seems to be about a hundred different ones to choice from. When I looked at it I was shocked at the paint job and labeling it had. Looked like a five year old fixed it. I wanted to keep the core and rebuild it myself, but it's hard to find the right schematic for it. I found one that gives me the resistor and cap. values but it's a little different form the EEC I have. The schematic I saw said that all resisters are 1/4 watt unless labeled otherwise. There are quite a few that look more like 1 or 2 watt resistors. I guess I could build it with 2 watt resistors where they will fit. Most of the time I need to take the resistors off the board in order to tell if they are still good. If I could find the right schematic I would love to rebuild it with higher quality parts and could order the parts all in one shot. The problem with trying to read the color codes on the 26 year old resisters is the colors are hard to read and reading the values with test equipment is no good unless they are still good. So, it is imperative that I have a good schematic to work by. I will probably still work on it some more, after all this is the brains of the outfit.

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Reply #7 – December 15, 2012, 10:42:30 PM

I just found two bad resistors in the same vicinity as the bad capacitor. No turning back now.

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Reply #8 – December 16, 2012, 08:11:47 AM

Nope, now you're making a reman PCM.

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Reply #9 – December 16, 2012, 01:18:05 PM

Hope it works out. If it does, maybe you can do a write up on it.

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Reply #10 – December 16, 2012, 01:20:14 PM

I'll be interested to see if you find a common denomniator,,,
like components in or on entry of pin #X are effected.

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Reply #11 – December 16, 2012, 11:01:08 PM

I'm ordering parts tomorrow, so it will be a while before I can finish up this project. I will keep you informed.

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Reply #12 – December 18, 2012, 01:49:55 PM

any progress yet,,,?

and you know we need pictures! : )

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Reply #13 – December 21, 2012, 10:05:03 AM

I got lucky, I was able to check all the resistors right on the board. The two resistors that I had thought were bad were good, the colors were hard to read. So, all I found was one bad electrolytic capacitor out of the three. Being they were all old and inexpensive, I replaced them all. I haven't had a chance to find out what it will effect yet. Thanks!

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Reply #14 – December 21, 2012, 10:14:49 AM

i wasnt even thinking, i could have (still can) done a stare and compare with one of my EEC's to help you make out colors and such.

btw, i think santa got me a huntron!!!!!

can you imagine how convienient it is to be able to check caps, transistors and such without lifting a leg?