W 100 Pickup L6-225 3.7L (1984)
8.
Turn off engine, connect vacuum lines and remove tachometer. Install PCV valve, then remove jumper wire, if equipped. After step 8 has been
completed, idle speed may change slightly. This condition is normal and engine speed should not be readjusted.
CARTER BBD & HOLLEY 6145 CARBURETORS
1.
Disconnect and plug vacuum hose at EGR valve, distributor and carburetor, as required.
2.
On models equipped with carburetor ground switch, connect jumper wire between switch and ground.
3.
On models not equipped with spark control computer (SCC), disconnect and plug vacuum hose from carburetor at heated air temperature sensor.
4.
On all models, disconnect and plug control hose at canister.
5.
Remove PCV valve from cylinder head cover and allow to draw underhood air.
6.
Connect tachometer, then start engine and allow to reach normal operating temperature.
7.
On models equipped with oxygen sensor feedback, disconnect electrical connector from oxygen sensor and ground connector, then allow engine to
run for two minutes.
8.
On models not equipped with oxygen sensor feedback, allow engine to run for one minute.
9.
On all models, open throttle slightly and position fast idle adjusting screw on second highest step of fast idle cam.
10.
Open choke fully, then adjust fast idle speed screw to obtain specified RPM.
11.
Return to idle, then reposition adjusting screw on second highest step of fast idle cam to ensure correct RPM. Readjust if necessary.
12.
Turn off engine, then connect vacuum hoses and remove tachometer. Remove jumper wire and connect oxygen sensor electrical connector, if
equipped. After step 12 has been completed, idle speed may change slightly. This condition is normal and engine speed should not be readjusted.
