Join Date: Jun 2012
Location: Johnson City, TN, US
Local Time: 06:38 PM
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limp mode on long grades on interstate
my 04 MCS goes into limp mode when traveling up a long grade on the interstate. Triggers fault code for misfire in cyclender 4. I have had the coilpack changed, plug wires, plugs. Had the car to two different dealers and two independant garages. Dealerships just tell me it's plug or a wire and then blow me off. The guy at the last shop put a computer on the car and drove up a nearby mountain till the fault occured. According to him, the car never developed a miss but he couldn't find the cause.
I'm thinking maybe a problem with the bypass valve or maybe the coilpack is a cheap aftermarket piece and should be replaced with a hotter unit.
Any thoughts? Any contact information as to who to talk to at MINI. Seems like a safety issue (I keep thinking an 18 wheeler is going to land in my back seat).