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Gasket?
- Thread starter mizzutgr
- Start date
I don't have an answer for that question. Just trying to get to the bottom of a huge Milage decrease. Runs just fine, plugs look good, no sign of blown head.....
But, I have a lot of leaks along the whole exhaust manifold. Throttle body is also clean. It's a bigger decrease than the usual winter decrease. Just trying to unravel the mystery.
But, I have a lot of leaks along the whole exhaust manifold. Throttle body is also clean. It's a bigger decrease than the usual winter decrease. Just trying to unravel the mystery.
- Location
- Hammertown, USA
cracked exhaust will mess with your o2 sensor, could cause a decrease yes.
- Location
- Virginia City, NV
Take a really thorough look at your header when you replace the gasket. Id bet its cracked. I have a apn on mine. It has three good sized cracks at only a year old.
- Location
- Minneapolis, MN
Exhausts manifolds cracks or leaks will allow fresh air to enter the exhaust flow and confuse the O2 sensors. Expect about a 20-30% drop in mpg's.
Fix all known issues first, and then see if the gas mpg's are acceptable.
Fix all known issues first, and then see if the gas mpg's are acceptable.