Track5tar

iTrader: (2)

i recently had my crankshaft oil seal replaced at firestone and since then my car will run fine sometimes but there are times at stop lights or stop signs when i come to a stop and the rpm idles from like normal to almost shutting off...if i keep my foot on the gas a little it will stay on. even when i stop and put it in neutral the rpm jumps from like 500 to almost 100...which its never at..but when i press the gas all is fine..any ideas?

i scheduled to have firestone look at it.. i think when they redid the timing it might be off a hair?