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You need to inspect the wiring @ the actuators, upper harness and the leads coming off of the MAF's. All of this will fail...Did it All on our 94 w/ 35K miles a few years ago. Also, be sure to pull the caps and rotors and give a close look for any carbon tracing. These like to burn up their insulators Behind the rotor and arc through to the block. Causes all manner of Fun.
I like to smoke the intakes on these looking for leaks, unmetered air will through the mixture into a tizzy.
I'd also just 2X check and make sure the cat's are there just for fun...wouldn't be the first time I'd seen an M120 sans cats after they failed from poor running.
Awesome, Awesome car but staying ahead of her/keeping on top of things is going to make owning a Fleet of SD's look like a nap;-)
jono
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