Like the title states. I searched but could not figure out what I should be looking for specifically.

When I start the car cold it barely runs. Car chugs really bad and knocks when revved. HG has been replaced, wires, plugs, cap, rotor, dizzy. Plugs appear as if the car is running lean. I can floor it and it makes almost no difference, car still is idling at 50-75rpms, chugging for almost 20 minutes. Once it's warmed up, it runs perfect, absolutely perfect. No CEL.

My thoughts are: ECT, FITV, IACV, O2?, injectors, or FPR. I am leaning towards fuel due to the plugs and knocking. I just never thought temp would have much to do with fuel delivery? Maybe it's vaccuum related? Is it possible I have a vac line collapsing when cold and killing the fuel delivery?

I don't think it's mechanical simply due to the fact that it runs perfect when warm. Not even a miss, idles perfect also.

Thoughts?

 

Clean the FITV:

https://honda-tech.com/forums/acura-integra-6/%2A%2A%2A-how-%2A%2A%2A-clean-your-fitv-aka-fast-idle-thermo-valve-1564019/

 

But it won't run almost any different at full open throttle.

 

That's a good point. Still, use your finger to check whether the FITV port in the throttle body is pulling a strong vacuum when the engine is cold. If not, the FITV may be part of the problem.

Other candidates might be the coolant temperature sensor, the distributor sensors, MAP sensor, or even the throttle angle sensor.

 

will do and report back.

 

I had the same issue with my 94 it was the fan switch. The colant sensor on the thermostat housing.

 

This is the ect, correct? Im picking one up tonight to try and fix it.

 

The FITV whistles like a **** when it's pulling vacuum right? The upper hole inside the TB ? When I plug it the car dies, is that normal behavior?

 

The FITV draws air through the lower port of the throttle body. You should feel a strong vacuum from this port when the engine is cold but no pull at all when the engine is warm.