Retrobird Tech Tip...Regarding Limp Mode...
Dot Lang of Porthole Authority provided me with this additional information regarding the 2002-2005 Retrobird Limp Mode problem..
"As for the limp mode. There are other causes of that happening besides it being a coil problem. It can also happen if there is an air bubble in the water system. (had that happen to our 05, once only). Thank goodness the limp mode didn't affect the driving of our 02 like I've heard of for a very few of the 04s. Had a friend with an 04 limited edition PCR that sold hers because she found it unreliable because of that problem though her dealership never seemed to find the source. She lived in Dallas at the time. We didn't know much about the coils at that time. Most of us have quit using Ford dealers to diagnose problems as they just remove and replace. Parts are getting much harder to find thru Ford dealers. Independents are the way to go now with their age.
Part of the problem with going into limp mode, is the driver. When there are 1 or 2 coils going out, stomping on the gas is sure to bring in the limp mode but that's hard to keep from doing if you're in traffic and need a sudden burst of energy from the car. Best to keep a steady, light foot on the gas until it can be checked out and fixed. You may have experienced that feel when you're driving an old car at slow speeds in high gear and trying to go up hill and you find the engine "lugging". Remember that term? You probably just put it in a lower gear and moved on. Whenever we have a coil going out in our 02, we're just more careful about pushing that gas pedal but we're also aware that it is a coil going out when we start to feel the car jerking. We also take it out of 5th "overdrive" gear and back into the more direct 4th gear. The 02 has gone thru 2 sets of coils and is on it's 3rd set now for 2 years but we also have 177,000 miles on it now. I drive it almost daily. Dot."