Terrible gas mileage.

[96RS Alex]

Re: Terrible gas mileage.

I'd replace the EGR Valve first, its quite easy to do and will increase your mileage. It eliminated my SES light as well. Mileage went way up on my 3.8 M5.

As far as the O2 sensors go, have a tech take a look at the circuit to see if they're actually heating up for proper output readings and which particular sensor. If you have the time, replace them all.

[95redslp]

Re: Terrible gas mileage.

well what engine does he have? 3.4 EGR valves can be expensive ... i found one on ebay though for $85... can be quoted over $200-$400 from a shop or auto parts store

[ssms5411]

Re: Terrible gas mileage.

Nope, just an inaccurate gauge.

On mine if the needle is just below the half mark, it means I have 4-5 gallons left in my tank. I have tested this about 20 times. So yes the gas gauges are way off in our cars. Or it could just be mine. LOL

[jnxV6]

Re: Terrible gas mileage.

On mine if the needle is just below the half mark, it means I have 4-5 gallons left in my tank. I have tested this about 20 times. So yes the gas gauges are way off in our cars. Or it could just be mine. LOL

I have the same problem with my gas gauge as well, when I fill it full it goes way past the F mark on the gas gauge.