'87 fpr vacuum connection
Thread Starter
Heel & Toe
Joined: Feb 2013
Posts: 23
Likes: 0
From: Corpus Christi Tx
'87 fpr vacuum connection
did the AIR delete during a header install (love the extra room) where do you connect the vac line that comes from the fpr and manifold (2 to 1 vac line) fsm showed it connected to AIR relay.. currently have it plugged but also have random chugging at 9 to 1,3k rpm.
Race Director
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
There are two vacuum ports on the rear of the plenum on the passenger side.
The front port goes to the A.I.R. solenoids and the fuel pressure regulator.
The rear port goes to the vacuum check valve and then to the cruise control and the HVAC programmer.
The front port goes to the A.I.R. solenoids and the fuel pressure regulator.
The rear port goes to the vacuum check valve and then to the cruise control and the HVAC programmer.
Team Owner
Joined: Jan 2003
Posts: 20,324
Likes: 249
From: Summerland B.C. Canada
Cut the old Y vacuum tubing and reuse the rubber connectors, to make a single line from FPR to intake port.
Thread Starter
Heel & Toe
Joined: Feb 2013
Posts: 23
Likes: 0
From: Corpus Christi Tx
concur two vacuum ports passenger side,rear to check & hvac (no cruise control) front joins fpr and fwd to AIR (removed) relay. can cut and fit using current fittings from fpr to front port. (hope it helps w/ low rpm miss, already did plugs, plug wires, distributor cap and rotor)
Thanks for all replies appreciate your input and time taken !!!!!!
YEAAAA!!!! only slight miss or hesitation is noticed now,,, much better guess fpr was losing some vacuum. checking fuel pressure next ...........
Thanks for all replies appreciate your input and time taken !!!!!!
YEAAAA!!!! only slight miss or hesitation is noticed now,,, much better guess fpr was losing some vacuum. checking fuel pressure next ...........
Last edited by abenton; Sep 9, 2014 at 07:46 PM.
