Originally Posted by Durdan

this will not cause any rich issues. removing vacuum source from the regulator only brings it to static fuel pressure which is 45psi as opposed to 38psi with vacuum. not enough for a poor running condition.

and if there were to be a vacuum leak on an NA setup, it would cause it to run lean.. not rich. remember, it is pulling in MORE air than the ecu is alloting fuel for.

a vacuum leak on an SR would cause a lean condition, but rather a blown couple would cause a rich condition bc when a pipe blows off, the turbo is allowed to freespin a little quicker (no restriction) and since the turbo draws in much more air than your open throttle body is, the MAF is counting more air than the motor is receiving.

hence why on an SR when you blow a pipe off its pig rich, but not with a vacuum leak.

in a nutshell, not a vacuum leak.


if you can swing it by S&R, ill check it out for ya. or if youre not too far, i might be able to make a house call sunday or so.