quicktsi
Registered User
My 91 SC w/ aod is only averaging 18 mpg on the highway. The trip is on a flat 20 mile stretch of highway. I average about 70-80 mph on the highway. The car does not run bad at all, even when the tach drops out. The car gets only 91 octane premium gas. What do I need to do? Will a bad cam sensor affect gas mileage?
Here is a list of what I have done.
New tires
Alignment
4 month old fuel filter
Mobil 1 changed 1k ago
redid the DIS with artic silver 5.
Things to check/replace
Cam sensor
boost leak test<--and install teflon gaskets if needed
check air pressure in tires
air filter <--can not see light when you hold it up to sun light
plugs and wires<--original owner said they have been changed
02 sensors
Here is a list of what I have done.
New tires
Alignment
4 month old fuel filter
Mobil 1 changed 1k ago
redid the DIS with artic silver 5.
Things to check/replace
Cam sensor
boost leak test<--and install teflon gaskets if needed
check air pressure in tires
air filter <--can not see light when you hold it up to sun light
plugs and wires<--original owner said they have been changed
02 sensors