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For those of you unfamiliar with my car, check the link below to see a basic run down of all the modificaitons i've done to it... basically, it's not anything close to a stock engine anymore, so this might be the reason why my vac reading is different...
...anyways....
I took my autometer boost gauge out of the dash, and hooked it up DIRECTLY to the line in the engine compartment that feeds the gauge inside the car... bypassing the line inside the dash anyways...
...still only had 10hg...
so this verified there is not a leak in the dash vac lines then...
...so i left that attached there under the hood and one by one, took off vac connectiond and plugged them up... turning the engine off before each "test" of course.
I found that the lines to the FPR is fine, charcoal canister fine, PCV fine, Bypass valve fine, and all three lines on the BPC solenoid were fine...
and by FINE i mean that when they were plugged, the vacuum reading remained 10hg in vac. Sometimes it would creep up towards 7-8hg too, like right before the high speed cooling fan turned on, it was weird. I could look at the gauge and see the vac spike a little bit, and then the fan would come on. Happened everytime...
that's probably normal but anyways...
When driving the car it seems to idle fine... right up at 1 on the tach. Sometimes it rises and falls rapidly on it's own while say waiting at a light, but the AIC is "new" and has been cleaned... most major engine components have been too...
Also, the gauge will read 20hg vac when MOVING IN GEAR with my foot OFF the accel.
Say, i'm driving down the street at 35mph in 3rd gear, and i let off the gas... Vac drops to 20hg.
it's 10hg when it's idling at a stand still...
SO sorry for the roundabout post but i wanted to get everything out in the open so i can get some advice...
is this a normal condition becuase my engine is so altered? or is there a vac leak somewhere else in the system? and WHERE else could there be a leak? i plugeed all of the lines to test right at the source...
thanks
-gavin
posted by 69.169.238...
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