What is this part called?

[SalvadorP]

EDIT: I found the name. "Throttle link rod" I just don't know how to adjust it and I'm affraid of breaking it.

I think this "Throttle link rod" is adjusted too short and that's why the idle is too high. No matter how much i unscrew the little adjustment screw the idle does not drop from 1000.
The sensor is clicking and is well adjusted.

[360beast]

I call it the throttle linkage rod, you slacken the little 8mm nuts off and then turn the metal bit in the middle with the flats one way to lengthen it and one way to shorten it. Be careful not to overtighten the nuts as the plastic will be brittle and can easily crack, make sure you are using a guide on how to do a basic idle setting as you don't want to just mess around with it blind.

It's worth pooping the ball sockets off and putting a small bit of grease in them.

[SalvadorP]

Originally Posted by 360beast

I call it the throttle linkage rod, you slacken the little 8mm nuts off and then turn the metal bit in the middle with the flats one way to lengthen it and one way to shorten it. Be careful not to overtighten the nuts as the plastic will be brittle and can easily crack, make sure you are using a guide on how to do a basic idle setting as you don't want to just mess around with it blind.

It's worth pooping the ball sockets off and putting a small bit of grease in them.

I was consulting this guide on brickboard: https://brickboard.com/RWD/volvo/168...djustment.html
The proess you describe is after releasing the ball sockets right? And that is my issue. It looks like you just pop them with a screwdriver and the ball soket will release right? I just don't want to assume and brake them.

Btw, do you agree with my deduction that that is the reason the idle is high? I mean, the throttle lever isn't even touching the adjustment screw and the idle is steady at 1000.

[SalvadorP]

you pop these and they open up?

[SalvadorP]

Either I'm missing something in my understanding of this system, or my car has some part that is not mounted/set-up correctly.

I untied the linkage rod and the adjustment screw and the idle did not drop one bit. The throttle lever just remains in the same position, just doesn't drop/close any further. What does this mean?

I don't know if this means anything, but with the car runing, i pinched the inlet hose that goes to the IAC and the idle dropped (don't know how much because I was doing this alone) but the car didn't stall.

[griston64]

Idle is adjusted with the TPS did you check that was ok ?

[Forrest]

Yes. You pop the clip on top of the ball sockets up and you can then click the linkage off. They still attach quite firmly even if the clip is broken, so best do this when they are warm to try to minimise the risk of breakage.

If you do break either of the plastic parts then they are still available. They are different and sold individually without the metal threaded rod, which is sold separately.

Right-hand thread (top) 946703
Left-hand thread (bottom) 946704

You adjust the linkage per the attached. It will adjust in situ because of the opposing threads, but you need to undo the lock nuts which are also left- and right-threaded.

You do not use this linkage to adjust idle. However, you do want to ensure that it is properly adjusted before checking idle. The steps to set idle are covered succinctly in this thread on Turbobricks, alas without pictures.

https://turbobricks.com/index.php?th...1/post-2921952

However, before embarking on this bear in mind that none of these settings generally go out unless someone has previously messed with them to try and mask another problem. Erratic or high idle is not going to be due to a sudden conspiracy in these components!

[SalvadorP]

Originally Posted by griston64

Idle is adjusted with the TPS did you check that was ok ?

You mean the position of the sensor influences how high/low the idle is?
I had messed with the TPS recently and the car was idling bad and very high. I think it was when I tighten the bolts the sensor probably moved slightly and maybe it wasn't clicking. Now it's idling very steady. Although slightly high at 900rpm give or take, but seamingly better than it was before I tried adjusting it the first time.

Originally Posted by Forrest

However, before embarking on this bear in mind that none of these settings generally go out unless someone has previously messed with them to try and mask another problem. Erratic or high idle is not going to be due to a sudden conspiracy in these components!

Fortunately the plastic seems to be in great shape. Maybe it's not original. I did however realize that the linkage did not indeed need adjusting.
There is still soething about this system I'm not understanding fully.

Grinston said above that the idle speed is adjusted on the TBS. Does that mean depending on the rotation of the sensor the idle will be high or low? This is probably a very stupid question
Does it mean that if I keep rotating the sensor counter clokwise after it clicks the idle will be lower? I screwed it it place right after it clicked.