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Check engine light is on. Another fine mess

623 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
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