[s-cars] S4 hesitates , stumbles at elevation

[George Verbryck]

Well I have gotten several replies for coil failure as the suspect. This unfortunate as the coils are the newer 2.0t coils for 06+ cars.The new style coils are beefier and bigger but I guess have not fully addressed the problem yet. I was trying them out in hopes I would not have to replace the whole coil system again . The plugs were changed at the same time with the NGK Iridium. I bet they do not have 5000 miles on them . I have the Apikol coil harness.  Again on flat land  I have no symptoms, I guess the extra umphh of passing uphill exposes coil failure quicker. In the meantime I can just wait for it to get worse, great. On the bright side it was still a great drive and I do not live in the mountains so I will not have to be dissapointed everyday. Regards, George