Posting this for a friend who has a 2007 Ford Ranger 3.0 V6 and auto 53k miles. Truck ran fine until one morning when he started it up and was missing like crazy with check engine light flashing … Could not get vehicle to go over 30 MPH so had it towed to a mechanic. He said it sounded like it was running on 3 or 4 cylinders with raw gas smell out of exhaust.
Mechanic said coil pack bad and replaced. 3 days later same symptom, mechanic replaced coil pack again.
Same thing again 2 weeks later. Making a long story short replaced with coil pack number 4. Mechanic stated he found a bad plug wire and replaced,
He never inspected the spark plugs.
Got truck back tonight and running fine "for now ". I am an older fellow who has older cars with carbs, points etc
so not too up to date with newer models.
What would cause 4 coil packs to go bad in a month ? I am saying “maybe” bad spark plugs.
Maybe you guys can give me some info on what would cause this issue as I told him he should dump
this mechanic and find someone else. I feel like going over to his home and pull the plugs to check them
or just replace out of my own pocket making sure gap is set correctly etc, as he can’t afford much more
of this right now.
First time he was charged 150.00 to replace the coil pack, 2nd and 3rd under warranty, now he socked
him another 160.00 for the fourth one and a new plug wire.
Also my friend advised that he can hear the coil pack "clicking " I thought maybe an over voltage problem with alternator but says he has a steady 13.9v through different RPM ranges so ok there.