Thread: Distributor hose and fuel pressure regulator hose

Did you clean the IAC and where it seats in the back of the plenum, some carb cleaner in the back and the IAC itself should do, the large(r) hose goes to the throttle body, did you check if the Vac. advance is working by sucking on the hose, Regards Frank.

Originally Posted by bigmac2x2

Hi,

Thanks for the reply, I have had the IAC off and know of the two nipples on the iac, the bottom one goes to the fuel regulator, the top one (which has a valve - see pic 5) goes where?

Cheers in advance.

Greg.... btw when i take that hose off, the idle or engine does not change at all.

Hose in pic 5 goes into the dashboard somewhere. It is a low flow-rate so pulling it off will make little difference to the engine, but will affect any vacuum controls in the car.

Tank,

I have had the IAC off and cleaned it thoroughly, all lines are clean, all lines have no leaks. I have pulled the vac advance off and sucked on it and the engine idle reduced. Since rehooking the lines to the correct parts, the engine still idles high (about 1000 rpm) but does not fluctuate or stutter. Still smells like it is overfueling tho. I have done the reset the base idle but it only gets down to about 900 rpm when the screw is fully seated and has no further adjustment to go.

Cheers

Greg

Do you have 2 ports on the Vac. canister on the dissy, the one closest to the dissy body should have a blanking plug, the outside one (furthest from dissy body) is connected to the plenum. Does your model have the hose from the IAC to the throttle body (10 to 12mm I.D., Regards Frank.

Tank,

My dissy is as you described. The IAC has a hose from the IAC to the throttle body about 10 - 12 mm as seen in pic 1.

Cheers

Greg