Volvo AWD S70 Forum

INDEX FOR 10/2025(CURRENT) INDEX FOR 3/2003 S70 INDEX

[<<]  [>>]


THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD




  REPLY TO THIS MESSAGE    PRINT   SAVE 

rough idle...but only when cold S70

posted by  jauty on  Thu Oct 30 13:30 CST 2003
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS] [RELATED]

When I start my s70 in the morning, the idle is rough, but just until it warms up, never stalls. I have noticed I have to drive at least 15 minutes for the temp gauge to get to mid point. I doubt these two facts are related but need advice. Also slow to heat.

1. Is the bad idle related to a possible bad mass flow sensor..I got a trouble code of P0102?
2. Is my thermostat going bad? Got 144,000 miles with plenty more desired. Thanks for any advice.








  •   REPLY TO THIS MESSAGE    PRINT   SAVE 

    rough idle...but only when cold S70

    posted by  someone claiming to be frgak on  Fri Oct 31 10:10 CST 2003 [RELATED]

    My 98 V70 did the same thing. Turned out to be the thermostat. When it gets old and sticks open, the cold coolant runs through the cold engine and doesn't allow the engine to warm up properly, hence the long warm-up time.








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

    rough idle...but only when cold S70

    posted by  jda2000 on  Fri Oct 31 07:06 CST 2003
    Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
    last visit: Sun Jan 1 21:27 CST 2012
    [RELATED]

    I bet the thermostat has failed already in the open position. It takes about 3 min for my temp gauge marker to get to the 3 o'clock position.
    --
    '88 240, '92 740, '98 v70 GLT John in Tampa Bay








  •   REPLY TO THIS MESSAGE    PRINT   SAVE 

    rough idle...but only when cold S70

    posted by  someone claiming to be Ray N. on  Thu Oct 30 15:09 CST 2003 [RELATED]

    The thermostats typically are good for about 70K miles. a few
    people recommend replacing them at the 70K servcie. So I suspect
    the thermostat on your car may need replacing (I think you should
    do so with that many miles on it).

    Not sure why it would idle rough when cold. I have a 98 S70 and it
    seems to warm up pretty quick (and my thermostat failed at about 65K
    miles).







<< < > >>



©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.