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 MANUALSCHEVROLET1983CAMARO BASE, 5.0 H, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMEGR FUNCTION TESTINGCOMPONENT TESTINGNEGATIVE BACKPRESSURE EGR VALVE
1983 Chevrolet Camaro Base, 5.0 H, Automatic
Negative BACKPRESSURE EGR Valve
1983 Chevrolet Camaro Base, 5.0 H, AutomaticSECTION Negative BACKPRESSURE EGR Valve
- With EGR valve in vehicle and engine off, disconnect EGR valve vacuum signal hose. Connect vacuum pump to vacuum signal tube and apply 10 in. Hg. EGR diaphragm should move up and remain up for 20 seconds.
- If diaphragm does not stay up for 20 seconds, replace EGR valve. Using an assistant, again apply 10 in. Hg to signal tube. Have assistant immediately try to start engine. Observe diaphragm for movement.
- If diaphragm moves to a seated position (valve closed) during cranking and initial starting, EGR valve is functioning properly. If diaphragm does not move, clean or replace EGR valve.
- If EGR valve is not in vehicle, connect a short section of hose over EGR valve seat. Apply 10 in. Hg to vacuum signal tube. EGR valve should open. If EGR valve does not open, clean or replace EGR valve.
- With vacuum still applied, plug intake port of valve with thumb. Apply suction to hose connected to EGR valve seat. EGR valve should close immediately. If further testing is required, see appropriate COMPONENT TESTING article in the EMISSION section.
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.