97 850 hesitation at highway speeds

[97 850]

I have an 850 that hesitates at about 68-70mph and pulls back with no let up on the accelleration, the tach actually goes up slightly. Hoping it's not the transmission. Any ideas?

Thanks,
Chris

[Guest]

Sounds like the transmission. Any codes set?

Your Volvo stores information on how the car is running. If there's a fault(s), that fault will be stored as a code in the computer's memory. The fault may or may not also trigger a warning light like "Check Engine" or the dreaded flashing arrow. To see these codes on 1997 and newer Volvos, you must take your Volvo to:

a Volvo Dealer (call first to check price, reading should be free)

independent mechanic (call first to check price, reading should be free)

parts supplier (call first to check price, reading should be free)

or buy an OBDII tool to do it yourself ($100 - 300)

Look for Tsquared's post regarding a new $40 code reader.

[matthew1]

Whoops, that last post was mine.

I've noticed my Google Ads at the top of all MVS forum pages now advertise code readers, FYI. I don't recommend any one brand over another, by the way, only because I haven't done any head-to-head testing.