New? Start here. See the forum's active topics. Say hi contact Matthew.
This Amazon link helps MVS!

’97 850 Turbo De-Tuning

“Help Me Make My Volvo Slower”?

I know I’m going to sound stupid and ignorant with this, but I need to know if there is any way to tune down my 850 turbo. I kicks in at the slightest throttle pressure and is just eating up gas at a horrific rate. It apparently is not an engine tuning problem because 2 different Volvo mechanics have checked that out and they say that the engine is in great shape and running at peak.

Is there any way to tune the turbo that allows me to keep it from cutting in at low speeds?

’97 850 Turbo Tuning

Bonus! More on the Volvo 850

Volvo unveiled an entirely new model series in June 1991, the Volvo 850 GLT. The Volvo 850 GLT was launched under the banner of “A dynamic car with four world-beating breakthroughs”.

The four new features were: transverse 5-cylinder engine driving the front wheels, Delta-link rear axle which combined the dynamics and ride comfort of independent suspension with the security of a live rear axle, the SIPS integrated side-impact protection system, and the self-adjusting front seat belt mechanism.

The exterior design of the 850 bore a strong Volvo identity, and its 740 and 940 heritage was immediately apparent.

Volvo 850 GLT received a tumultuous welcome; seldom has a new car reaped so many awards as the 850.

Over the intervening years, the 850 series has been expanded with additional variants, among them turbocharged petrol versions and a direct-injection turbo-diesel.

The Volvo 850 was also the first car in the world to offer side-impact airbags, which were introduced in autumn 1994.

In model year 1997, the S70 replaced the 850 Sedan car.

Subscribe to the MVS Newsletter

The MVS Volvo Newsletter is a once-a-month email delivered to your email. It’s simple to unsubscribe at any time if you change your mind.

Visit The Official Volvo Cars Website


I would check to see if someone shortened the rod to the wastegate. To get the turbo to kick in sooner you shorten the rod a turn or three and it takes out some of the delay of the turbo kicking in. Someone may have shortened yours up a bit much and you may need to start lengthening it one half turn at a time.

It sounds like your Sports mode selctor switch is set on performance, try selecting the Economy mode and shifting will become normal. The swith is to left of the gear shifter.

Your turbo is actually helping you improve your gas mileage. It actually gets 4-6 more mpg than the naturally aspirated

Leave a Reply