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3 new sensors bad out of the box. Had to mess with the MAF settings in the bin file, too.

I had my 3800TPI absolutely F*CK with my head for months. Checked all vacuum lines, cleaned all kinds of sensors, plugs, and contact points. It would run fine while cold, but start surging at idle in Park while up to temp. It would also stall when going into reverse. I was SURE it was MAF-related... Nope, It was the g***amn o2 sensor. My brother was the one who figured it out, after going through many of the same steps I took. I've never had any other car react so severely to a bad o2 sensor, ever. It was very blind-sighting. Exhaust never smelled particularly rich or lean, either.

Lol… so just quadruple that for todays cost…

That was over a decade ago and the repair was less than $500.

That is a very typical spot for these cars to rust out. Being a MI car that doesn't surprise me for there to be rust in that area. It is repairable, I had a shop repair rust on my old car in that exact same location.

"Linkage adjustment" generally involves bending the linkage back to the shape it was supposed to be. The linkage rods are not strong enough, they bend. As they bend, the handle has to be lifted more and more to actually open the latch. When the handle reaches the limit of it's travel...you pull a little harder and the handle breaks. LOOK at the striker on the body. Is it wearing on top? If so, the hinges need to be re-bushed or adjusted. Lube everything...but lube is for "prevention", generally not for "cure".

I seem to have gotten it to work okay with a combination of a certain tune and a certain MAP sensor. It's only reading like 2 psi boost max and 12 psi vacuum. It should be reading 100 w/ key-on, but it's reading 84. That's the closest any of the 4 2 bar MAPs I've tried. (NAPA L32 162 kPa, AMZ L32 185 kPa, other L67 168 kPa). Offset for GT is 10.33 and GTP is 7.99. Someone on the DHP/HPT fakesbook martinsplace group got pretty snappy with me trying to convince me it's a wiring issue. I have 5V input and ground. The reference signal is controlled by the MAP. I'm confident that it's an issue with all of my sensors. The NAPA one brand new $70 unit won't change readings with vacuum applied. That dude is still in my head, though. I don't want to change the scaling and offset this sensor being off, but it looks like that's what I'm going to need to do. I talked briefly with the guy that tuned my Forester and those were his initial thoughts, too, that the scaling was off. I'm going to flash it to the same tune it's running now but with an offset of 10.33 instead of 7.99.