Thanks all! I'm stumped as to what AAV stands for? Had hoped for an easy resolution but appears that will not be the case. I've noticed, also, that the idling is getting rougher, although it still smooths out after warming to 175 degrees. Very odd to me.

Thanks again!

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Leigh Anne

'77 450SL
'95 Mitsubishi 3000GT Spyder
'07 Chevrolet Suburban