'92 850 2.0 20V Intake Swirl Flap. Missing solenoid, do I lose a lot of power?

Post by **koralski** » 08 Apr 2025, 12:37

matthew1 wrote: 08 Apr 2025, 12:19
koralski wrote: 08 Apr 2025, 11:39 BTW, a little off-topic. Is there a way to directly support you Matt?
You found it.

Thanks for your donation, koralski!

No problem, thanks for your website. It really is a treasure trove of info. This 850 is my real first project. The guys here have been really helpful.

Post by **koralski** » 08 Apr 2025, 12:41

misha wrote: 08 Apr 2025, 11:52
koralski wrote: 08 Apr 2025, 11:23 I think we'll just change the intake. The system is complicated and the vacuum lines are gone, as well as the solenoid. I think the solenoid is NLA.
You will have the same results as leaving it as it is...because ecu is programmed to have variable intake.
You will need to tune the ecu to run the engine without it.

Are you positive about that?

Post by **misha** » 08 Apr 2025, 12:55

Pretty sure.
Without it...ecu will set CEL and disable or disturb the fuel trims.

Does the car have MAF on air filter housing or just IAT sensor like 10v cars?

Post by **koralski** » 08 Apr 2025, 12:58

It does have a MAF on the air filter housing, yes.

Post by **misha** » 08 Apr 2025, 13:57

Try with a regular intake manifold...you have nothing to loose...it can't be worse.

Post by **koralski** » 08 Apr 2025, 14:43

misha wrote: 08 Apr 2025, 13:57 Try with a regular intake manifold...you have nothing to loose...it can't be worse.

That is true. I will swap them. Is there any scientific test I can do to check if it is better or worse?

0-100?

Post by **misha** » 08 Apr 2025, 15:41

I don't know...i think that variable intake is there to provide more torque in lower rpm.
Not really sure what is it's purpose since all other engine managements don't have it.
Maybe Volvo solved that with different software.