Cleaning ICV and Throttle Body on the E30 !!! 

My VR head gasket leaked oil down the side of the block. Stay away.

very true they suck

​@Mark Romans I replaced my head gasket years ago with a VR and I also ended up having oil running down the passenger side of my block. I ended taking my valve cover off and I torqued my head bolts a little tighter and the leak stopped but then came back after only a couple hundred more miles.. I was thinking it was maybe because I reused my head bolts and also thought maybe because I didn't check my block to head surface to ensure it was perfectly flat. I did get my head resurfaced and pressure tested before installing so I'm pretty sure it's not the head.. so yeah, perhaps I need to do the job again and use brand new head bolts this time, ensure the block is true flat and try a different brand gasket. Did you end up replacing your head gasket again?

alec mathews BMW Style 5

Kajakas777 Its for the cruise control.

Hey did you figure out the issue?

Need an o ring

@@pasmichael what is the o ring for?

Push Weight Not really, a dirty throttle body usually causes a low idle and if its bad enough could cause the engine to stall at times but I suppose it could if it was dirty enough and the throttle plate was sticking ?

Coolant hoses

Yea I figured that out I had to remove the throttle body off to get to the throttle body coolant housing

@@EricNomads7 i took my throttle body off and i forgot to take pictures, i am trying to get the coolant lines put back in the same spot, could you tell me if the top line on the throttle body runs into the back of the block or does it go to the thermostat housing

log dog Top goes to block and bottom to thermostat housing

Around 800rpm. How about yours?

like 500/600rpm

I would try cleaning the ICV and Throttle body first since thats the cheapest. If that doesn't help, when was the last time you changed spark plugs, wires, cap, and rotor ?

Thats the first thing I did.. spark plugs have about 2k miles on them wires, cap, rotor no idea but I don't think that affects the idle. Also replaced the tps. I was thinking it could be the afm?

It could effect the idle. If the cap and rotor contacts are worn out the spark will won't be as strong causing even a slight misfire which will feel like a rough idle. You can clean out the AFM as well if just to make sure it isn't that. Something else to think about is a bad blue temp sensor making your car run rich and idle low. To go even further with the diagnosis, there could be an exhaust leak before the 02 sensor. which would cause your car to run rich as well. let me know how it goes !

Play Or Die I’ve used WD40 and an old toothbrush when cleaning the throttle body but probably not the best for the ICV

You might have a vacuum leak somewhere. Try spraying carb cleaner on some vacuum hoses, throttle body, intake manifold gasket area, and injectors while the car is running. If the idle changes when you spray a certain spot then I suggest replacing that gasket, hose, etc..Also clean the ICV and Throttle body.

Thank you...i'll try tomorrow ...i'll report back

cleaned icv...also replaced it...no help..it even went up to 2000 rpm ...cleaned throttle body as well. nothing good. the only interesting thing is that when i disconnect the MAF the car shuts down. other than that still idling very high

Esteban Canela Any vacuum leaks ? Yeah thats weird usually it would stay running but put the car into open loop. Maybe your car is idling high because it doesn't go into closed loop. To go to closed loop the blue temp sensor needs to see a certain temp and then the o2 sensor starts giving the DME accurate measurements to adjust fuel accordingly. If there is no vacuum leaks Or exhaust leaks before the o2 then you should look into testing the o2 or blue temp ?

Este Can did you ever find a fix??

You probably have a vacuum leak somewhere. Try smoking the system or spraying brake cleaner around all the intake system and listen for the idle to change.

There was a leak in that hole in the valve cover. I ended up getting a new valve cover. It has a hole in it and and that inner plate that sits on the inside part of the valve cover was filled with junk. I needed up replacing the whole engine during this.