W350 1 Ton Pickup 4WD V8-360 5.9L VIN 1 4-bbl (1988)
Engine and Body Application
Parts Required
2.2L - 2V Federal & California N-Body
4275084 Label
5.9L - 4V Federal & California B- & D-Body
4306424 Carburetor
4275084 Label
On 1988 N-body trucks equipped with 2.2L - 2V engines, Federal and California emissions, readjust idle mixture at altitude.
On 1988 B-* & D-Bodies Do the Following:
1.
Remove original carburetor and install new carburetor, PN 4306424, as outlined in the service manual.
2.
As outlined in the service manual, adjust idle specifications as follows:
Manual
Automatic
Idle RPM
750
750
Propane RPM
780
780
MSIS RPM
750
850
Timing RPM
750 +0, -150
710 +0, -150
3.
Type "This vehicle has been modified to meet altitude emissions standards" on the VECI update label, PN 4275084, and affix near VECI label.
*
B-vans less than 8500 GVW
On 1988 B300 Models Greater Than 8500 GVW:
1.
Remove original carburetor and install new carburetor, PN 4306424, as outlined in the service manual.
2.
As outlined in the service manual, adjust idle and choke specifications as follows:
Manual or Automatic
Idle RPM
750
Propane RPM
780
MSIS RPM
850
Timing RPM
710 +0, -150
Choke Kick
27 Degrees
3.
Type "This vehicle has been modified to meet altitude emissions standard" on the VECI update label, PN 4275084, and affix near VECI label.
POLICY:
Information only
