Boost & Idle issue...

[dorkidori_s13]

Originally Posted by KiLLeR2001

You'll want to check your fuel pressure, also make sure you didn't cap off your fuel tank vent line (if you removed the charcoal canister). Easiest way to tell if your tank isn't being vented properly is when you go to the gas station and open the cap, it'll make the "psshhhhh" noise releasing pressurized air.

You can pull your plugs to see if they indicate a lean running condition.

Do you have a vacuum hose routed back to a catch can and then to intake after MAF to relieve some of the positive pressure in the crankcase?

If all this checks out you may want to pull the IACV for further inspection.

Also check to make sure your CTS is within spec, irregularities with voltage output of the CTS can cause a higher/irregular idle.

ill check the plugs later today when i get home

all vacuum lines are routed properly and so are oil circulation lines from the crank case. only thing removed was the OEM oil catch tank that hangs near the rear of the valve cover (i never had it hooked up on my last SR and it ran fine for 8 years without a hitch)

gas can vent thing in engine bay is not plugged (i removed the charcoal canister, ive never un one). get plenty of gas tank hiss.

im planning on pulling the IACV soon. gonna get a plastic manifold spacer as well as new fuel injectors, new fuel rail and FPR. i plan on going after the intake manifold with a TON of B12 to get it all cleaned up (i know theres a pool of old nasty oil sitting in there). IACV will be taken apart and cleaned like whoa.

ill see what i cant do about getting a multimeter and checking out the voltage on both the CAS and TPS. i know if the TPS isnt set with the right voltage, idle sucks on an SR