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Stumble at idle story/fix
Had the MAF failure like stumble/stall at stops with normal higher throttle response. Had fixed this problem with a new MAF a couple of years ago but suddenly returned. Got a new MAF just "cause" but problem didn't disappear this time.
Thought of a vacuum leak but hoses I could see were good. Closer inspection of the manifold intake plastic showed a crack on the lower PS side where there was a dual hose insert site, one for the valve cover breather hose. I guess 25 years of hot oil soaked vapors finally got the best of this plastic seam which seemed like a heat weld of the 2 pipes into the manifold body. Solvent clean, air gun dry of cracked area and hi temp RTV at crack site seems to be the fix.
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1992 Dark Teal LSL, 4.44 swap, B&M trans cooler, AFPR, RX8 rims, 235/40-18 tires, SS brake lines, Hawk HPS pads, Strongflex poly ft/rr swaybar bushings, starter solenoid mod.
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