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I was very surprised myself. Yep. Grabbed a pack of 4 elbows at Autozone for $6. My check engine light finally came on even though I was having idling issues for months. I got a code 13 from the OBD1 and one of the possible explanations was atmospheric pressure from the MAP. That elbow was...

Just gonna add my 2 cents in case anyone has a similar issue. I replaced my iac, map, tps, plugs, etc because of a very rough idle (sometimes stalling out at stoplights and other times idling at 1500 rpm). It ended up being a loose vacuum hose connection running from just below the throttle body...