Ron took our 2018 Ford Escape to the dealership this morning for an oil change and that the car ran rough when first started.  On the way there the check engine light came on.  No blinking but steady.  So the dealership told Ron that to even do the tests would be $360 plus the cost of the oil change along with any needed repairs.  They came back to Ron nearly 2 hours later and told him we needed a new engine for $10,000 because of a dome spark plug clearance problem.  Ron told them he drove it there with no issues and he was driving it home.  I called Randy who has some knowledge and works with mechanics who say that it is possible but not likely and that the engine should go for $3,500 not $10,000.  I found online that normally it is the plug that is the problem, using the wrong plug or the plug specs have changed a small amount.  But like anything online I couldn’t find a real clear answer.  I could use some help if anyone out there understands engines and this stuff.  Thanks and hugs