Car idling at 4k with white smoke

[Law_]

i guess coolant pipes should go to idle motor yes !

[Spoof]

Can you make some pictures of your current situation? so we can see more and probaly give some more advise

Ill get some up tomorow does anyone know if any coolent pipes should be going to the throttle body?

Dont know if you question is answerred, but you dont have to. Is only against freezing in the winter.

[Dodo Bizar]

Original D14 has 2 small coolant lines which run towards the throttle body, or to be more precise, the RACV (idle valve). Those 2 cooleant lines may be short-ciruited with each other so no coolant passes through the RACV, which keeps it cooler.

One of the coolant lines passes through the inlet manifold right next to the fourth runner (right side of the car). Now my worry is that this passage has a leak, did you clean the original gasket from the head? Sometimes this can be very nasty to do.

[mynameisowen]

what is the purpose fo the two coolant lines that run to the RACV? is it to help with cold starting or something??? no issue short-circuiting them?

[Dodo Bizar]

When you have a cold start, the coolant is also cold... no diff there. It is more while driving in extreme cold conditions, no icing on the TB and other internal part while you're in -40 Celcius or so. Really extreme conditions to my opinion. I drove it in minus 25 once and still no issues with everything short-circuited.

[mynameisowen]

but if the engine is warm, say your restarting after having driven for some time. Maybe the ecu measures coolant temperature in the block as usual but also adjust airflow when semi-warm starting so it doesnt let too much air in, which would make the revs higher using more fuel than is needed...

[Law_]

I thougt the coolant lines passing through throttle body were just to "tell" throttle motor when to decrease from 1500 to 900rpm based on the liquid temperature.

[mynameisowen]

law i thought the ecu used the temperature sensor in the block to determine that but maybe it could use two measurements???

[Dodo Bizar]

Both are right, ECU is primary system, coolant is secondary system in case the ECU or cables from it fail... which really is very unlikely though. With other D-series both functions are split and there are actually two valves in many D's. One for ECU, one for coolant (cold idle valve in those cases).

[Law_]

Great. Thanks for the clarifying.