You know the "mechanic's fiances truck" problem.

I recently replaced the cam sensor in my 05' F250 Gas. The check engine light had been on for a while before that and my truck rode great, however I now want to sell it and I can't do that with a check engine light on. It's got about 85k miles on it.

After replacing the sensor, the light went off for about 20 miles, but it is now back on and my truck seems to miss every once in a while on acceleration or cruising. Some days it's worse than others. The check engine light still says cam sensor, but the sensor is brand new.

My fiance is a mechanic, so I don't know all the details about code numbers and such. However, I want to sell this truck pretty soon, and I would like it to run correctly. Any ideas? His dad (another mechanic) seems to think it could be a coil and wants to wait for that light to come on, but I would rather fix the problem and sell the truck!

 

What brand of sensor was installed? lots of the aftermarket sensors are worse than the bad ones they replace. If it isn't a Ford brand that might be the problem. I have seen this lots of times.