SaabCentral Forums banner

Check engine light is on. Another fine mess

621 Views 2 Replies 3 Participants Last post by  Rod'899kT
Hi My 9000 is rough at idle It drops to about 400 the goes up to 2600 an back again. The check engine light is on. My mechanic thought it was the MAM which we replaced but did not solve the problem. He wants to change the ignition cassette. These $400.00 parts are getting too much any help would be welcome. Thanks
1 - 1 of 3 Posts
Try checking the Oxygen sensor. the resistance should be between 1-2 ohms. if it is bad the fuel mixture gets screwed up and it costs $80. Check engine light usually means pollution controls
1 - 1 of 3 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.