Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET1982CITATION L4-151 2.5LREPAIR AND DIAGNOSISBRAKES AND TRACTION CONTROLHYDRAULIC SYSTEMLOAD COMPENSATORADJUSTMENTS
1982 Chevrolet Citation L4-151 2.5L
Load Compensator: Adjustments
1982 Chevrolet Citation L4-151 2.5LSECTION Adjustments
1. Remove air cleaner and plug related vacuum fittings. Disconnect and plug vacuum hoses at canister purge port, EGR valve and ILC unit.
2. Turn throttle stop screw counter-clockwise 3 turns.
3. Start engine and place transmission in drive (manual transmission in neutral).
4. With ILC plunger fully extended (vacuum hose disconnected), adjust plunger with tool J-29607, or equivalent, to obtain 750 RPM (2 Bbl.) or 725 RPM (4 Bbl.).
NOTE: Jam nut on plunger must be held with a suitable tool to prevent damage to guide tabs.
5. Reconnect vacuum hose to ILC while observing tachometer. If idle speed is within specifications, proceed to step 12.
6. If idle speed is not within specifications, remove ILC from carburetor.
7. Remove rubber plug from ILC center outlet tube--Fig 130--then remove metal plug from outlet tube.
8. Reinstall ILC unit. Install a spare rubber cap over outlet tube with a hole punched to accept a 3/3,2 inch allen wrench.
9. Insert allen wrench through spare cap, start engine and place transmission in drive.
10. Adjust ILC as needed to obtain 500 RPM, then remove wrench and install a new cap over center outlet tube.
NOTE: Turning ILC adjusting screw changes engine speed 75-100 RPM for each complete turn. Turning screw clockwise decreases engine speed; turning screw counter-clockwise raises engine speed.
11. If idle speed is not within specifications, repeat steps 8-10.
12. After adjusting ILC plunger mea9ure distance between jam nut and tip of plunger. Distance must not exceed 1 inch.
13. Disconnect and plug vacuum hose to ILC plunger and connect an external vacuum source to fitting on ILC.
14. Retract ILC plunger with external vacuum source, then adjust idle speed to 500 RPM with throttle stop screw.
15. Stop engine and remove external vacuum source. Reconnect vacuum hoses to proper fittings and install air cleaner.
2. Turn throttle stop screw counter-clockwise 3 turns.
3. Start engine and place transmission in drive (manual transmission in neutral).
4. With ILC plunger fully extended (vacuum hose disconnected), adjust plunger with tool J-29607, or equivalent, to obtain 750 RPM (2 Bbl.) or 725 RPM (4 Bbl.).
NOTE: Jam nut on plunger must be held with a suitable tool to prevent damage to guide tabs.
5. Reconnect vacuum hose to ILC while observing tachometer. If idle speed is within specifications, proceed to step 12.
6. If idle speed is not within specifications, remove ILC from carburetor.
Fig. 130 Idle Load Compensator (ILC) (Typical):
7. Remove rubber plug from ILC center outlet tube--Fig 130--then remove metal plug from outlet tube.
8. Reinstall ILC unit. Install a spare rubber cap over outlet tube with a hole punched to accept a 3/3,2 inch allen wrench.
9. Insert allen wrench through spare cap, start engine and place transmission in drive.
10. Adjust ILC as needed to obtain 500 RPM, then remove wrench and install a new cap over center outlet tube.
NOTE: Turning ILC adjusting screw changes engine speed 75-100 RPM for each complete turn. Turning screw clockwise decreases engine speed; turning screw counter-clockwise raises engine speed.
11. If idle speed is not within specifications, repeat steps 8-10.
12. After adjusting ILC plunger mea9ure distance between jam nut and tip of plunger. Distance must not exceed 1 inch.
13. Disconnect and plug vacuum hose to ILC plunger and connect an external vacuum source to fitting on ILC.
14. Retract ILC plunger with external vacuum source, then adjust idle speed to 500 RPM with throttle stop screw.
15. Stop engine and remove external vacuum source. Reconnect vacuum hoses to proper fittings and install air cleaner.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.