Caprice Wagon V8-305 5.0L (1986)
17.
Install four carburetor mounting bolts and tighten to 16 N-m (12 ft.lbs.) in the following sequence:
a.
Left rear
b.
Right front
c.
Right rear
d.
Left front
SERVICE PROCEDURE
18.
Reinstall the following:
^
Accelerator control cable. Make certain that the retainer tang is secured over the throttle lever stud.
^
Throttle return spring.
^
Transmission throttle valve (T.V.) cable and adjust as outlined on page 7A4-7 of the 1986 Caprice, Monte Carlo, El Camino Service
Manual (ST-329-86).
^
Cruise control linkage, if equipped. Lube carburetor end with 1052541 lubricant prior to installation.
^
All vacuum lines to carburetor.
^
Electrical connectors to carburetor.
^
Choke heater pipe. (Tighten to 11 N-m 95 in.lbs.)
^
Fuel line at carburetor inlet. (Tighten to 41 N-m 30 ft.lbs.)
^
Pipe plug in rear of throttle body. Coat plug with 1052080 sealer and tighten to 10 N-m (88 in.lbs.).
19.
Adjust the idle mixture needles as follows:
If the idle air bleed valve cover on the carburetor air horn has been previously removed, it will be necessary to adjust the idle air bleed valve
setting prior to idle mixture needle adjustment. Refer to page 6E1 C2A-7 in the 1986 Caprice, Monte Carlo, El Camino Service Manual
(ST-329-86) for idle air bleed valve adjustment.
a.
Disconnect canister purge vacuum hose at canister and plug hose.
b.
Plug air cleaner vacuum line.
c.
Connect dwell meter to the mixture control solenoid test connector.
d.
With transmission in park, parking brake set and drive wheels blocked, start engine. Check for fuel leaks and correct if necessary.
e.
Allow engine to run until warm. (Upper radiator hose warm to touch and choke open.) Ensure fast idle cam is down completely.
f.
Place vehicle in drive.
g.
While idling in Drive adjust both mixture needles equally, in 1/8 torn increments, until dwell reading varies within the 25-35 range, attempting to
be as close to 30~ as possible. If reading is too low, turn mixture needles counterclockwise. If reading is too high, turn mixture needles clockwise.
Allow time for dwell reading to stabilize after each adjustment.
SERVICE PROCEDURE
If dwell reading becomes fixed, the O2 sensor has probably cooled off (open loop). To warm the O2 sensor (closed loop) place transmission in park and
flash the throttle 3 or 4 times.
h.
After adjustments are complete, seal the idle mixture needle opening in the throttle body, using silicone sealant, RTV rubber, or equivalent.
20.
Adjust idle load compensator (ILC) as outlined on page 6E1-C2A-11 of the 1986 Caprice, Monte Carlo, El Camino Service Manual (ST-329-86).
21.
Check the throttle body secondary lever for proper adjustment of the following. Adjust if necessary.
