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 MANUALSCHEVROLET1986CAMARO BASE, 2.8 S, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSIS2.5L TBI TESTS W/CODESCHART A4 - CRANKS BUT WON'T RUN (A/F/J/N/P BODY)
1986 Chevrolet Camaro Base, 2.8 S, Standard
Chart A4 - Cranks But Won't Run (A/F/J/N/P Body)
1986 Chevrolet Camaro Base, 2.8 S, StandardSECTION Chart A4 - Cranks But Won't Run (A/F/J/N/P Body)
- 7) Circuit No. 439 supplies ignition voltage to injector. Using a test lamp, probe each connector terminal. Test lamp should light on one (1) terminal, confirming voltage at connector. The ECM injector circuit No. 467 may be open. Reconnect injector. Using test lamp, probe terminal 8 of White ECM connector. A light at this point indicates that injector drive circuit is okay.
- 8) No "blinking" light indicates no ECM control of injector. With voltmeter on AC 2 volt range, voltage should be greater than .7 volts. If voltage is less than .7 volts, there is an open or short to ground in HEI reference circuit No. 430. If circuit is okay, there is an HEI problem.
- 8A) Disconnect distributor connector. Momentarily touch ECM side of connector, circuit No. 430, with a test lamp connected to 12 volts. Note injector as contact is made. Injector should turn on. If injector turns on, ECM circuit is okay. Connect spark tool ST125 and check for spark. If spark is okay, HEI module is faulty. No spark indicates an HEI problem.
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.