Volvo AWD V70-XC70 Forum

INDEX FOR 10/2025(CURRENT) INDEX FOR 5/2015 V70-XC70 INDEX

[<<]  [>>]


 VIEW    REPLY TO THIS MESSAGE Replies to this message will be emailed.    PRINT   SAVE 

MPG problem V70-XC70 1998

posted by  jadnhm on  Tue Nov 15 09:13 CST 2011
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Tue May 22 18:03 CST 2012
[RELATED]

haha yeah it's getting pretty bad.

It has a pretty new O2 sensor in it - I put a new Bosch on about 2 years/20k miles ago hoping to fix my fuel economy problems back then....

I can see the live output on my scanner and it really looks good. The scanner has a 'test o2' mode and it always passes, and my O2 system monitor always passes as well. I haven't set an o2 code either. I /think/ the O2 is fine right now, but I guess there's always the chance that something could be off...

I will definitely test the sensor out, but I can see the output from my scanner and it looks to be pretty accurate to me. I think the best way to check would be to test the temperature of the thermostat housing and compare it to the output as seen on my scanner. If they're too far off the ETC should be replaced?

Strangely enough I got an EVAP leak code last night P0442 (small leak) and I did a quick test with pressurized air (~4psi, which is the official test described in VADIS BTW) on the intake system and found no leaks at all. I was surprised! So maybe I've got a small leak in the EVAP system, perhaps in the purge valve like this guy:
http://www.matthewsvolvosite.com/forums/viewtopic.php?f=1&t=31691

--
1998 V70 AWD->FWD->AWD Turbo 220k+






THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD

New Thermostat Temperature Theory
posted by  jadnhm subscriber  on Mon Nov 7 09:52 CST 2011 >


<< < > >>



©Jarrod Stenberg 1997-2022. All material except where indicated.


All participants agree to these terms.

Brickboard.com is not affiliated with nor sponsored by AB Volvo, Volvo Car Corporation, Volvo Cars of North America, Inc. or Ford Motor Company. Brickboard.com is a Volvo owner/enthusiast site, similar to a club, and does not intend to pose as an official Volvo site. The official Volvo site can be found here.