Quote:
Originally Posted by m5james
What sparks plugs did they use though? Others have reported power loss when using Bosch +4 spark plugs as opposed to the NGK's that should have been installed. Just an idea. I've worked for dealerships in the past, and sadly enough, it's not uncommon for them to either not do or "forget" to change something in the effort of saving a buck. Since you had the Insp II done recently, take 10 minutes and pull the plugs yourself and give them a look.
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thank you for the insight.
Well I supplied the shop with the NGK Part #BKR6EQUP that where recommended by ECS tuning. Now I dont know what the old plugs where I think NGK but prior to my Inspection 2 I was still getting crappy gas mileage even with my old plugs in and with the new ones there is no change.
I suspect the coils are weak. I remember in my old E36 M3 supercharged I changed the coils and plugs and noticed a horsepwoer increase of 25 to the wheels. Got better gas milage as well so I am thinking new coils ?? Spark maybe weak ? I just had a coil fail on me as soon as I drove from the shop
Anyone else with some ideas