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 MANUALSCHEVROLET1990LUMINA APV V6-191 3.1LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTESTING AND INSPECTIONSYMPTOM RELATED DIAGNOSTIC PROCEDURESDIAGNOSIS BY SYMPTOMHARD TO START
1990 Chevrolet Lumina APV V6-191 3.1L
Hard to Start
1990 Chevrolet Lumina APV V6-191 3.1LSECTION Hard to Start
If engine cranks but will not start without long cranking, or if engine starts but immediately stalls, check the following:
1. Binding or sticking TPS, or high TPS voltage with throttle closed.
2. High resistance in coolant sensor circuit (see Trouble Code 15).
3. Incorrect fuel pressure or contaminated fuel.
4. Improper EGR operation, leaking, binding or sticking EGR valve.
5. Ignition system malfunction, worn damaged or fouled spark plugs.
6. Defective in-tank fuel pump check valve allowing fuel to drain back to tank after engine is stopped.
7. On V6-173 (2.8L) if engine starts, then dies, open distributor bypass line. If engine starts and runs properly, replace pickup coil.
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.