Volvo AWD V70-XC70 Forum

INDEX FOR 10/2025(CURRENT) INDEX FOR 12/2009 V70-XC70 INDEX

[<<]  [>>]


THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD




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

Can you diagnose (answer included)! V70-XC70 2001

Back ground: 01 V70 T5 with 89,500 miles. 3 hour road trip from Bay area to Reno Nevada.

1st indication: Cruise control goes off. At the time we were descending the mountain from Donner pass, and had coasted up to about 85MPH (cruise was set at 65MPH). Initially thought because of the excess over speed, it had tripped, but even after slowing down, it would not reset.

2nd indication: Could feel the engine miss a few beats every 5 minutes or so.

3rd indication: Substantial Power loss as we approached a hill.

As we approached our destination and transitioned off the freeway to city streets, the car continued the above indications, but continued to run. We parked and had a 3 hour meeting with our supplier. I hoped the cooling off might reset something, and off we’d go!

Upon restarting the car I checked if the cruise control would turn on. IT WOULD NOT. As we pulled out of the parking lot, and went about 50 yards to make a U-turn, the car stalled. It immediately restarted, but would only run about 4 seconds. During the 4 second run time, it would both idle or rev up, but would immediately shut off after about 4 seconds, but would always restart, and shut down, no matter how many times I’d try it. Answer below: Don’t peak, Ha Ha!!!








ANSWER: The air tube from the high pressure side of the turbo had disconnected at the front of the engine near the radiator where it transitions to a rubber hose to the intercooler. I had disconnected this interface when I had moved the plastic tube to gain access to the cover over the spark plugs about a week before. Apparently while I had remade the connection, I had forgotten to tighten the hose clamp, and the hoses had disconnected! A lesson learned that hopefully I can pass to fellow forum members! So who can explain why the cruise control would not turn on? The power lose is obvious, but wouldn’t the car keep running on non-boost, and essentially revert to a Non-Turbo engine? Hope you enjoy learning from my experience. Any other members care to share too?

Jerry
01 V70 T5








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

    Can you diagnose (answer included)! V70-XC70 2001

    All of us DIYers who own a turbo have forgotten to tighten the IC piping at least once! Usually, we "test drive" the car afterward and learn that at full boost the engine sounds like something exploded ( the IC piping coming apart) and then limping home.

    Your electronics kept the CC off because there was a problem. My 1998 will do the same thing because the manifold pressure will be at zero, too low to sustain CC knowledge.

    An engine designed with a turbo is not the same as an NA engine. Of course, if you take the air hose off an NA engine at the throttle body, it won't run either!! The reason your car started and then stalled in 4 seconds was that the fuel pressure was too high, vacuum regulates fuel quanity and your vacuum was zero, which is around 1500 rpm?? It started because the system is in default mode at start up time and then checks the sensors and modifies fuel/spark/air while the car is running. Just 4 seconds?

    Klaus
    --
    Just driving a 1998 V70R :)







<< < > >>



©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.