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 MANUALSCHEVROLET1983EL CAMINO V6-229 3.8LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTIGNITION SYSTEMKNOCK SENSORTESTING AND INSPECTION
1983 Chevrolet EL Camino V6-229 3.8L
Knock Sensor: Testing and Inspection
1983 Chevrolet EL Camino V6-229 3.8LSECTION Testing and Inspection
Chart C-4C - EST Performance Check:
Wiring Diagram for Chart C-4C - EST Performance Check:
CHART C-4C - EST PERFORMANCE CHECK
Test Description:
1. Grounding the "test" terminal causes the system to go to a fixed spark advance which should be different from that obtained with EST operating.
Engine is run at fast idle to get more spark advance. Usually the change is enough so it can be heard in RPM change. If so, it is not necessary to check timing.
2. The check in drive is made because some engines will not have EST operating in P/N.
3. Checks to see if fault is in MAP/VAC system.
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.