Riddle me this -fuel filter - transmission '05 XC70

Faust · Post by **Faust** » 22 Jan 2021, 15:38

For the last few months, my transmission has been shifting (and downshifting) somewhat erratically. I had been waiting for warmer weather to attempt a fluid change. Last week, my fuel filter corroded right through; requiring an immediate replacement. Since replacement of the fuel filter, my transmission behavior has drastically improved. Can anyone see a connection? My "text window" (DIC?) which hasn't worked in recent memory, has also begun operating occasionally .

Post by **abscate** » 22 Jan 2021, 16:54

No connection there. Could just be low battery voltage for the rest.

Faust · Post by **Faust** » 22 Jan 2021, 16:59

abscate wrote: ↑22 Jan 2021, 16:54 No connection there. Could just be low battery voltage for the rest.

Didn't touch anything electrical. Only other change is sharply colder weather.

Post by **jonesg** » 23 Jan 2021, 08:35

fuel filter might have been sucking air a while, causing shift problem due to running lean/lower fuel pressure.

Faust · Post by **Faust** » 23 Jan 2021, 08:45

jonesg wrote: ↑23 Jan 2021, 08:35 fuel filter might have been sucking air a while, causing shift problem due to running lean/lower fuel pressure.

That I thought was a possibility, but wasn't aware of a sensor that might be activated. When my DIC first became activated, it indicated an average mpg of 12.5. This, I assume, resulted from severe leakage through the fuel filter. DIC has currently gone back to sleep and just glows.

Georgeandkira · Post by **Georgeandkira** » 28 Jan 2021, 10:52

Extremes in temperature can result in any faulty contact making or breaking.
After reading a bit about batteries lately, I'm all for throwing a charger onto an in-service battery once in a while.