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Does the scanner even "come to life" when you plug it in? If not, check for raw power to the connector. There should be +12VDC (-ish) at pin 16, and pin 4 should be continuous with ground.
Yes, I have the dreaded p0171 and p0174.
I did some minor repairs to take care of it.
So far I cleaned the MAF, looked over all the vaccum lines, and changed the fuel filter.
I cleared the code and see what happens from there.
The front o2 is fairly new, so I will change them last. I might even just go with a spoof for the o2's.
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