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.DBβ LIVE
HOMESERVICE MANUALSCHEVROLET1985C 10 P/U 2WD V8-305 5.0LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTESTING AND INSPECTIONSYMPTOM RELATED DIAGNOSTIC PROCEDURESDIAGNOSIS BY SYMPTOMHARD TO STARTWITH COLD ENGINE
1985 Chevrolet C 10 P/U 2WD V8-305 5.0L
With Cold Engine
1985 Chevrolet C 10 P/U 2WD V8-305 5.0LSECTION With Cold Engine
Definition: Engine cranks OK, but does not start for a long time. Does eventually run. If the engine starts but immediately dies (as soon as key is released from start position). See "No Start, Engine Cranks OK" symptom.
^ Perform "Diagnostic Circuit Check - Calif".
^ Perform the "System Performance Check"
^ Make sure driver is using correct starting procedure. See Owner's Manual.
^ Visual (Physical) Check:
- Vacuum hoses for splits, kinks and proper connections, as shown on Vehicle Emission Control Information label.
- Air leaks at carburetor mounting and intake manifold.
- Ignition wires for cracking, hardness, and proper connections, at both the distributor cap and spark plugs.
- Wiring for proper connections, pinches and cuts.
^ Check the choke valve, throttle and fast idle cam for sticking. Replace any malfunctioning parts. If caused by foreign material and gum, clean with suitable non-oil base solvent.
^ Check choke and vacuum break operation and adjustment. Choke should be closed cold.
^ Check EGR system for sticky operation that could cause valve to stick open.
^ Check float level using external float gage. Adjust float to specification if required.
^ Check carburetor fuel inlet filter. Replace if dirty or plugged.
^ Check ignition system - see Chart C-4B. Check distributor for:
- Worn shaft
- Bare and shorted wires
- Pick-up coil resistance and connections
- Loose ignition coil ground
- Moisture in distributor cap.
^ Remove spark plugs; check for wet plugs, wear, improper gap, burned electrodes or heavy deposits. Repair or replace as necessary.
^ Check ignition timing per Vehicle Emission Control Information label.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.