Hey there,

I have a Volvo 850 non turbo 94. Currently, when I start the car, it runs great. But as I keep driving for 15-20 minutes, the car runs super rough stuttering, idling bad, loss of power, and decreased acceleration. I checked the spark plugs and they were fine, as well as the mass air flow sensor and they were fine. The car has 200k miles and the throttle body and I suspect the PCV system having a issue? Thanks!

 

Pull the codes and see what comes up. If it is having all those problems Id assume it threw a few codes. Post them here and Im sure someone can point you in the right direction.

 

Hi thanks! The codes are listed221

213

122

 

Long Term Fuel Trim Lean at Partial Throttle
throttle position signal too high
Intake air temp sensor missing or faulty

Sounds like a bad MAF to me

 

https://www.matthewsvolvosite.com/read-codes-volvo-850/

122 Solenoid S1 open circuit
213 Throttle position (TPS) signal too high
221 S2 solenoid short circuit to ground or control module fault