Dwell And Ignition Timing Specifications - Pontiac Grand Prix Service Manual

EMISSION CONTROL SYSTEMS 6D-3
and idle stop solenoid energized, set the idle stop
solenoid screw to obtain "A" rpm. (Fig. 6D-2).
2.
T u r n
mixture screws clockwise to obtain "B" rpm,
idle stop solenoid still energized. Do not readjust idle
stop solenoid screw.
3. With jdle stop solenoid inactive, adjust the idle
speed screw on the carburetor to obtain "C" rpm
(solenoid inactive speed). Do not readjust mixture or
solenoid screws.
4. Reconnect idle solenoid wire.
Procedure for setting fast idle
-
with transmission in
neutral, choke valve fully open and fast idle lever on
the top step of the fast idle cam.
1. Bend fast idle tang on throttle lever for adjustment
Fig. 6D-2 Idle Stop Solenoid (6 Cyl. and Ram Air
(1 Bbl. carburetor).
only)
2. Adjust fast idle screw on four barrel carburetor.
NOTE: Curb idle on automatic transmission cars to be
set in drive with A/C turned off(wheref2ted).
NOTE: It i s important that the idle and timing
specifcations are strictly adhered to in order to ensure
proper control of exhaust emissions.
DWELL AND IGNITION
TIMING SPECIFICATIONS
lGNlT ION
DWELL
6 Cyl. (4 Bbl.)
V-8 30"
Ram Air IV 30" 15" BTDC
The accuracy of the t~hometer used for idle adjust-
NOTE:
Ignition timing to be checked with hose to distributor
mentS should be ~hecked periodically by an authorized
vacuum unit disconnected and idle stop solenoid discon-
representative.
nected on engines so equipped.