Yes, I forgot to list the acoustic feedback as one of the inputs processed by the computer. Since the history of this engine is unknown, anything is possible, including a broken off spark plug tip having bashed in the top of a piston! Let's see what the compression check shows. I was just concerned that fuel/air in the crankcase might crack more than a piston! Dick Benjamin ----- Original Message ----- From: <dardal@xxxxxxxxxxxxxxx> To: <mailing-list@xxxxxxxxxxxxxxxx> Sent: Thursday, June 06, 2002 2:42 PM Subject: cracked poston, was IML: 82 Imp EFI won't start/run > > > If > > you have flames coming out the breather, though, you may a have a > > cracked > > piston or worse. > > DB, the only way I know you can get a cracked piston is if the engine was > knocking (pinging) continuously, and the driver did nothing to relieve the > situation. These engines are of low compression ratio, and they do have knock > sensors, right? > > D^2 > > >