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08 Mariner 3.0 slight jump

2K views 4 replies 2 participants last post by  CatSkinner 
#1 ·
Hello everyone my name is Brad and I'm new to the forum.
I replaced the spark plugs on my girlfriends 08 Mariner 3.0 liter. Now at 25 to 30 mph it's banging into gear a little bit.
It use to do it every once in awhile but now it's every time.
I properly gapped each plug and made sure to reconnect each coil pack to its original home and the same thing with all other electrical plugs. I also cleaned throttle body and replaced the 6 plenum gaskets.
Does anybody have any ideas or tips to check?
No codes have flashed either.
Thanks.
 
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