Hi Matt,
I've certainly learned alot about Volvo's in the past 2 months! The parts are fairly cheap and I really like working on it in my spare time.
Thanks for the input! I forgot to mention that I did replace the brake booster check valve and brake booster vacuum hose. The brakes seems fine. I have also pinched the brake booster vacuum line to test the booster itself and I haven't seen any change in the lumpy idle.
I've also clamped the vacuum line going into the cabin that controls the vents (and possibly other thing). Again, no change in the lumpy idle.
I'm tempted to pick up a reman MAF (AMM) and see if that changes anything, but I feel that will be a waste of money.
- Mike
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