robwidner Posted June 6, 2013 Report Share Posted June 6, 2013 Hello everyone, i just got back from the Hot Rod Power Tour, and on the way home my car started feeling like it was surging ever so slightly at a constant throttle setting. The car doesn't seem to do it when idling, or when getting into the throttle,only at a steady setting it seems, such as when cruise control is on. Before leaving for the trip i had been to a local car show and the car started missing on the way home. I plugged in my Diablosport tuner and it showed a misfire on bank #8. I pulled coil covers and found the one on the passenger side against the firewall seemed to be loose. I replaced the coils { weapon X } and put the originals back on. Problem gone. But on my way back from the power tour it started feeling like a very slight surge at steady throttle. I have plugged in my tuner and shows no codes, any ideas? Bad gas, fuel filter, etc.. Link to comment Share on other sites More sharing options...
ingram4868 Posted June 6, 2013 Report Share Posted June 6, 2013 I would check all the intake connections just incase you have unmetered air sneeking in. Link to comment Share on other sites More sharing options...
robwidner Posted June 7, 2013 Author Report Share Posted June 7, 2013 Hey David agree with your idea, but i checked and found none. Any more ideas? Link to comment Share on other sites More sharing options...
2007tungstenGT500 Posted June 7, 2013 Report Share Posted June 7, 2013 it could be the tune file. i had a Mustang GT with a diablosport tune that worked fine initially but started hanging and surging in hot weather. swapped it for a ford racing tune and it went away for good. Link to comment Share on other sites More sharing options...
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