I should have been more specific. Van has 140,000. Customer brought it to me with blown head gaskets. Found that the leaky water pump was the cause. Did the head gasket repair, had heads machined and gone through, replaced water pump and surpatine belt, spark plugs. Got the engine back together and runs fine with low/rough idle. Didn't really get the chance to test drive vehicle, but did drive it into shop and the low idle didn't stand out at that time? Saw a post about the crank senser being bumped during surpatine belt install. Ill check that when I get home from work. Any ideas??? Thanks, Shane