I just bought a 2008 with 102k miles, that will be used for towing. I'm new to the ford diseal. It is using "or leaking coolant" I can not find a leak. can a defective EGR valve cause it on this motor? What does the egr delete kit do exactly? will improve perforance or should I just install new OEM unit? I'm in Ga. where there is no inspections. My brother told me i was messing up buying a ford. I would love to prove him wrong.