Quote:
Originally Posted by Undertoad
I am shocked SHOCKED that the mechanic performed the checks that tw repeatedly complained he must not have done.
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He did what I posted and did not do what I suggested. Please read what was posted.
Problem is intermittent. If an intermittent IACV, then he did nothing to identify a sticky, temperature sensitive IACV. He did what a diagnostics chart says to identify a constant (hard) failure. Apply voltage. Hear it click. But this is not a hard failure. A valve failing as I have suggested will always pass that test and continue to fail intermittently.
What UT did not read. An IACV works by opening and closing quickly. So fast that only an oscilloscope can see that timing. Did you read the word ‘oscilloscope’? Now read what was posted and tell us the mechanic did what was suggested.
Computers rarely fail. And do not fail only when an engine is warming up. Valves that fail only during warm up do so intermittently. Which part more likely causes an intermittent?
My second point that UT did not read: Mechanic is now doing only what he understands - shotgunning. Just keep replacing parts until something works. He reloaded software. No change. Replaced the computer. No change. So he is replacing the computer again without any reason to believe it is bad. At what point does it become obvious that the computer probably is not a problem? He has resorted to the “I don’t have a clue” option. Shotgunning because he has no idea what else to do.
The best part to shotgun is the one most likely to cause this type of intermittent (heat related) failure. What was posted, and not what UT read. UT go find a paragraph that includes the word oscilloscope. Now read this time what was posted.
Well, he is replacing a second computer - for free. If that does nothing, he should then shotgun the part that was more likely defective - an IACV. I put an IACV at about 65% likely to solve the problem - which is why I so dislike shotgun solutions.