My 2003 ML was running very unhappily this weekend, like it was missing 2-3 of its cylinders. After 3/8 mile it put on a CEL so I turned around and went home.
After seeing the crappy spark current traces on a Snap-On Soleus scanner, I figured it was time to get rid of the unknown age spark plugs and see if that cleaned it up. Coils are $50 each and a plug wire set is over $100. It's running OK now after I cleared all the codes, so I wonder if the ECM shut off the cylinders that were throwing too many misfires. I wonder how old the plugs are, and if I could have saved any fuel if I'd replaced the plugs 3000 miles ago when I bought it. 20-22mpg hwy is the best I ever got out of it. Rock is selling Autolite XP3924 Iridium plugs for $4.15, and Autolite has a $3 rebate, so I figured that was a decent deal on a car I have to buy 12 plugs for. They started charging sales tax, so the tax exceeded the 5% coupon code I used. Maybe I should have just bought them on Amazon for free shipping. Mitch. _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
