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2013-14 Shelby GT500
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<blockquote data-quote="SteveWK" data-source="post: 16045364" data-attributes="member: 139323"><p>Update on this fiasco. Got car towed back to Ford on flatbed. It was a spark plug that worked its way out. Picked the car up and drove it back to my place. Before I got home, the same problem began again. The car is getting towed back to Ford tomorrow. The only difference this time is I'm going to watch them work on it. </p><p></p><p>Personally, I think they FUBARED the threads on the head. They replaced the spark plugs trying to hunt down a random misfire problem I have been having. I have logged random misfires on all the cylinders during my diagnostic pursuits and haven't been able to figure out the problem. I thought Ford could with their more advanced diagnostic tools. Long story short, after they replaced the plugs they drove it extensively, but their diagnostic tools told them that cylinders 1 and 2 were down on power. Random misfire codes were still present on various cylinders; however, it did pass the IDS relative compression test. I then asked them to perform a leak down test. Everything looked good. I drove it home with the intention of figuring out the random misfire problem myself. I put maybe 30 miles on it and this whole problem started. They had to pull the spark plugs between the time they did their shake down test and the time they did the leak down test. I think this is when they messed it up.</p><p></p><p>What do you think?</p></blockquote><p></p>
[QUOTE="SteveWK, post: 16045364, member: 139323"] Update on this fiasco. Got car towed back to Ford on flatbed. It was a spark plug that worked its way out. Picked the car up and drove it back to my place. Before I got home, the same problem began again. The car is getting towed back to Ford tomorrow. The only difference this time is I'm going to watch them work on it. Personally, I think they FUBARED the threads on the head. They replaced the spark plugs trying to hunt down a random misfire problem I have been having. I have logged random misfires on all the cylinders during my diagnostic pursuits and haven't been able to figure out the problem. I thought Ford could with their more advanced diagnostic tools. Long story short, after they replaced the plugs they drove it extensively, but their diagnostic tools told them that cylinders 1 and 2 were down on power. Random misfire codes were still present on various cylinders; however, it did pass the IDS relative compression test. I then asked them to perform a leak down test. Everything looked good. I drove it home with the intention of figuring out the random misfire problem myself. I put maybe 30 miles on it and this whole problem started. They had to pull the spark plugs between the time they did their shake down test and the time they did the leak down test. I think this is when they messed it up. What do you think? [/QUOTE]
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