EGR95

i bought a GSR tb ( its installed in a b16a) and the inside of the tb there two holes. the top hole goes to the IACV (IACV is from a GSR) and the bottom one goes to the FITV (FITV is from a GSR). the problem is that the top hole is sucking to much air, and its causing my engine to idle rough, when i notice the problem i put my finger on the top hole it started to idle smoothly,but when i take off my finger it has the rough idle. i already clean the IACV and FITV so what could it be, and i check to see if the computer was giving me a code and i obtain code 14 so i dont know what it is.

EGR95

any takers?

EGR95

ok...

negroeg6

If it is a obd1 gsr t/b the the valve underneath it is bad.

EGR95

i fix it and don't think is bad who knows i might be wrong.

mattliston

did you read the stickies in this forum? one is titled FAQ and in there is a thread for ECU codes

check it out, it tells you exactly what code 14 is

EGR95

oh its the idle air control valve, so its not working?

Former User

The IACV is probably bad, though you should check the wires before you replace it. What happens to the idle speed when you unplug the IACV connector?

EGR95

let me go check, but the thing that i dont get is why is it getting to much air from the top hole of the throttle body?

Former User

The top hole leads to the IACV, right? So the IACV is allowing too much air to bypass the throttle body. This could be caused by a bad IACV or by a bad IACV seal. Have you checked the rubber seal?

EGR95

ok... this is what i did i obtain to different IAVC one was from the gsr and the other is from a d15b7 and i change the tb and put the d15b7 and i had the same results. could it be that the tb is 68 gsr + its after market part?

Former User

Does unplugging the IACV have any effect on idle speed? If not, troubleshoot the IACV wires.

EGR95

no i cant tell, its still the same.

Former User

This tells you that the IACV is not working at all. If you know the IACV is good, then check the wires. For example, does the IACV connector get voltage from the main relay when the key is in ON(II)? Do the wires between the IACV and ECU connectors have continuity?

EGR95

well, voltage is good and the wires have continuity.

Former User

Then you might consider the possibility of a bad ECU. Do you have a good one to swap?

EGR95

well i have a good one its of my d15.

EGR95

but what i did notice was between the TB and IM i spared carb cleaner and the idle drop.

Former User

Check the torque on the throttle body nuts and, if that doesn't stop the leak, then pull off the throttle body and replace the gasket.

EGR95

the gasket is new, and torque is tight. the leak is located at the bottom right corner.

EGR95

i change the idle air control valve and i dont have code 14 now i have code 22.

EGR95

anybody.