Additional question that I'll throw in here since it is related...
Last time I had a coil pack go bad, I had the mechanic at the shop in the car and he had a device hooked up to the computer while we drove. The reason was the car would not give the Check Engine light, but the miss from the bad coil was definitely there. I suspect I have the same thing again and would like to avoid the trips to the mechanic and just do it myself. (Curious if anyone else has had this problem) Anyway, was this simply a code reader (I know most recommend you only hook them up with the car off) or was this a data logger. With it, he could see the misfire code reported even though the check engine light never came on. I can tell you that it larger than other code readers I had seen, about 8" x 8" x 2" flat panel display, but I don't know anything of the specifics as it was some time ago and the shop has since been replaced.
Any have a recommendation for a good one to buy that is not overly expensive? The main thing I want is the codes and report while the engine is running...
