Long time member, I would suggest you look at the vacuum tubes. If that isn't it check your intake from the filter canister to throttle body. The tubes age and crack, a black 1/8" od. tube starts under Passenger side manifold (vacuum solenoid) to a splitter under the passenger side "T" coupler. onto the bottom of that coupler. then to the driver side manifold sensor, and then the front crossover tube butterfly valve. If you have a auto trans then the "T" is a 4 way with a tube going to your transmission.
This is the intake from a donor "S" tiptronics motor. which was the base for my LN 3.6 build
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2003 Black 986. modified for Advanced level HPDE and open track days.
* 3.6L LN block, 06 heads, Carrillo H rods, IDP with 987 intake, Oil mods, LN IMS. * Spec II Clutch, 3.2L S Spec P-P FW. * D2 shocks, GT3 arms & and links, Spacers front and rear * Weight reduced, No carpet, AC deleted, Remote PS pump, PS pump deleted. Recaro Pole position seats, Brey crouse ext. 5 point harness, NHP sport exhaust
Last edited by jsceash; 11-22-2020 at 07:33 AM.
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