Date: 8 Jul 2004 07:31:05 -0700 From: joelnewsnospamail.com (Joel) Subject: 1999 Saab 9-5 misfire diagnosis
My '99 9-5 began "bucking" on uphills under high power and low RPM and The "check engine" light came on (4 cylinder engine). My mechanic read the OBD-II messages from the computer and they were "cylinder 1 misfire" and "random cylinder misfire." He changed the spark plugs and then the ignition cassette (which is the entire computer/coil assmbly that plugs onto the four spark plugs) and was surprised that it still behaved the same way. Any thoughts on what else could cause this? Thanks! Joel