Or you can just yank the #6 fuse for a bit, which will reset the ECU. Did you check for OBD codes in sockets #6 and #2? The car may be trying to tell you something else... "What's that girl, Timmy's stuck in a well?"... :-)

Holes in intake hoses are not good things, but they don't necessarily suddenly appear, which means that hole could have been there for some time, and you may still have a problem elsewhere. Late 240's seems to be pretty good at compensating for gradual problems (like gradual vacuum leaks), it seems they they get most upset when a sensor starts feeding the ECU bad information.

Quick anecdote: my '90 240 suddenly started running very lean. Check engine light went on. Mixture and injector codes set. I did find a hole in the intake hose. Based on the "geometry" of the hole, it wasn't a sudden failure... it likely took quite a while to wear through. I replaced it. I had disconnected the battery for another job, so I buttoned everything up, went to start the car and it ran *terrible*. Very very rich. Then it would die after about 10 seconds. My heart sunk. I couldn't get her started. I disconnected the AMM. She started and ran. Reconnected the AMM, and it went back to rich running and stumbling. Replaced with a good used AMM, and everyone was happy.

Moral: The likely root of my problem was actually that the AMM had failed slowly and the ECU compensated for it over time, yet the AMM went completely out of spec causing the running problems. When I cleared the computer's memory by disconnecting the battery, it no longer rememebered how to cope with the AMM. So it ran awful, and only then did the car show classic AMM symptoms. Replacing the intake hose on my part was good, but it probably wasn't the root of the problem.

-Ryan
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Athens, Ohio
1990 245 DL 130k M47, E-codes
1991 745 GL 280k (Girlfriend-mobile)
Buckeye Volvo Club