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Hi, I'm Ron and I will be helping you today.Stand by for a moment while I prepare your answer.
This circuit also includes the computer too, so I would do some testing on that with a scan tool and a lab scope to see if that's the problem. All your wiring can be good.
Also remember to check the rest of the harness too if you haven't already.
This is an electronic device that can fail at any time without warning. I've seen many cars that were also struck by lightning and took out every module on the car, it just happens.
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Also, the only effective way to test a MAF is with a scope, see attachment. These are just some of many samples to show you that you can't run these tests with a volt meter, the problem would never show up.
Everything I told you is accurate and points right at the computer, especially the way you explained the problems.
Thanks again for you question and my rating.
Hi, I'm just following up with you to see if you have any more questions.Thanks, Ron