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.
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HOMESERVICE MANUALSCHEVROLET1977CAMARO LT, 5.7L ENG VIN L, AUTOMATIC TRANSREPAIR AND DIAGNOSISENGINE MECHANICALAUXILIARY EMISSION CONTROL SYSTEMSAIR INJECTION -- EXC. FORD W/CAT. CONVERTERTESTINGFUNCTIONAL TEST
1977 Chevrolet Camaro LT, 5.7L Eng VIN L, Automatic Trans
Functional Test
1977 Chevrolet Camaro LT, 5.7L Eng VIN L, Automatic TransSECTION Functional Test
- Start engine and let idle in Neutral or Park. Feel for presence of air exhausting out of lower portion of diverter valve. There should be no air coming out.
- Seal off vacuum supply to diverter valve by pinching hose. Hold for at least one second, then release hose. Air should now be exhausting from bottom of diverter valve. It should do so for about 4 seconds. Replace diverter valve if air does not exhaust.
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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.