Wrangler L4-150 2.5L VIN H TBI (1986)
Fig. 4 Fast idle adjusting screw. 1984-86 4-150/2.46L engine w/ Carter YFA 1 barrel carburetor
1984-86 4-150/2.46L ENGINES W/ CARTER YFA CARBURETOR
1.
Start engine and allow to reach operating temperature.
2.
Disconnect and plug EGR vacuum hose.
3.
Connect a suitable tachometer to engine, then position fast idle adjusting screw on second step of fast idle cam and note fast idle speed.
4.
Turn fast idle adjusting screw as necessary to obtained the specified fast idle RPM, Fig. 4.
