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Automotive Repair Car Troubleshooting Topics   Car Troubleshooting   Engine Troubleshooting   Engine Fault Codes   Electrical and Wiring   Transmission Problems Car Repair Topics   Car Making Noises   Car Stereo Repair   Heating or AC Issues   Motorcycles and ATVs   Tricks of the Trade   Truck Repair Advice Site Options:      Login   Sign up here! Latest Forum Post   Drive Shaft Repair I have a 2015 Chevy Traverse AWD. The fr...   2006 Toyoto Camry XLE Driver Side Electric Window Trouble Hello, Looking for a little brain help ...   Tierod end change caused some kind of leak Hello so I just took my car to the nearb...   2011 Dodge Nitro OBD scanner seems to drain battery in 10-20 minutes When I bought this car in summer 2023, a... Grounding Cable, 2017 Jeep Renegade Trailhawk The Cable that connects my negative batt... Rough Idle (Found new thing) Hi everyone. First of all sorry for bad ...     equipment hey yall. im a first year engineering st...   HELP I have a 1956 1/2 ton panel truck, 69 35...   Howdy     Just wanted to s...   ABS/Tractiob/Brake Lights on But No DTCs Hello all, Recently while driving m...

Search Auto Parts Search '07 Mercedes Misfire Sign up here!   Email This Post Auto Repair Home>> Automotive Repair>> Engine Troubleshooting Mojo New User Oct 1, 2012, 3:43 PM Post #1 of 4 (2300 views) '07 Mercedes Misfire Sign In Hi All, I have a 2007 C280 Mercedes with 160,000 miles, and a couple of weeks ago, I was pulling up to a stop sign and the car shuddered violently and the engine light came on and the car started shaking. I pulled the codes: Cylinder 6 misfire and Crankshaft position sensor. The misfire occurs maybe 15 seconds after starting the engine, while idling. The shaking (misfiring) is much better at higher speeds. I swapped the coil packs and spark plugs around, with no change, and replaced the wiring. I didn't believe it was the crankshaft sensor, so I took it to the dealer to try and diagnose it. On the way to the dealer, the car shuddered violently again, all the warning lights came on briefly, and then the car started running very smoothly with no misfires. However, after I parked at the dealer, the car would start again, indicating the CKS, so the dealer replaced the crankshaft sensor. Now the car starts again, but the misfiring is back. The dealership has no idea, so I came looking for help. Asking around, the valve springs on these cars apparently have a tendency to wear early, so could this be the case? Any ideas or help would be greatly appreciated. (This post was edited by Mojo on Oct 1, 2012, 3:44 PM) Hammer Time Ultimate Carjunky / Moderator Oct 1, 2012, 3:49 PM Post #2 of 4 (2289 views) Re: '07 Mercedes Misfire Sign In Quote I swapped the coil packs and spark plugs around, with no change, No change to what? I would expect it to keep misfiring but did the misfire move to a different cylinder? ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional. Mojo New User Oct 1, 2012, 3:54 PM Post #3 of 4 (2280 views) Re: '07 Mercedes Misfire Sign In The misfire stayed at the original cylinder, sorry. Hammer Time Ultimate Carjunky / Moderator Oct 1, 2012, 4:10 PM Post #4 of 4 (2273 views) Re: '07 Mercedes Misfire Sign In Somebody is going to have to replicate the symptoms and do some testing while the miss is present to determine if it's ignition, ignition trigger or fuel that it's losing. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.   Email This Post   Automotive Repair     Auto Body Repair and Refinishing     Heating or AC Issues     Electrical and Wiring     Brake Systems     Car Stereo Repair Advice     General Discussions     Car Making Funny Noises     Engine Fault Codes     Engine Troubles     Exhaust Systems     Steering and Suspension     Transmission Troubles     Tricks of the Trade Automotive World     General Discussions     Antique Car Talk     Car Shows and Events     The Bargin Bin     Motor Vehicle Inspection     Car Care Tips     Traffic Tickets     Gasoline, Motor Oils, Concept Cars and Engines     Auto Insurance, Financing, Leases, Warranties Truck Repair     General Discussions     Truck Engine Repair     Truck Suspension Repair Motorcycle Repair     General Discussions     Motorcycle Engine Repair CarJunky     Open Posting     Board FAQ's     New Board Suggestions

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