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Originally Posted by sad-lumina-owner
(5) Intake Leaks:
This sounds like useful information. I presume that the only fix is to re-gasket the intake manifold. Fair enough. If I can't get anywhere with other things, I will get to this too.
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Well, no, at least not till after you test. See post #6.
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The main point is that no codes are forthcoming
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Engine light has been on for 5 years.
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If you have a check engine light, you have code(s). And if the light goes out when you turn off at night, then it will blink your codes under the right circumstances. One of those circumstances is with a paper clip.
If your ALDL connector is different than the one I posted, you need to identify the pinouts for yours, and find out which 2, when jumped, will tell you your codes.