Auto Veteran

14/06/2025

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Chevy Nova
Dodge Challenger
Mustang Boss 429

14/06/2025

✅ Engine Timing Diagram Explained

An engine timing diagram shows the exact timing of events inside an engine’s cylinder—specifically when the intake and exhaust valves open and close during the four-stroke cycle:

Intake → Compression → Power → Exhaust.

This diagram helps mechanics understand how camshaft and crankshaft rotation is synchronized for proper engine performance.

Automotiv

🔄 Four-Stroke Cycle Timing Events:

1. Intake Valve Opens (IVO)
• Opens before the piston reaches Top Dead Center (TDC) on the intake stroke.
• Allows air-fuel mixture to enter the cylinder.
⏱ Usually opens 10–20° before TDC (BTDC).

2. Intake Valve Closes (IVC)
• Closes after the piston passes Bottom Dead Center (BDC).
• Keeps the mixture trapped.
⏱ Typically closes 30–60° after BDC (ABDC).

3. Exhaust Valve Opens (EVO)
• Opens before BDC on the power stroke, letting burnt gases begin to escape.
⏱ Usually opens 30–50° before BDC (BBDC).

4. Exhaust Valve Closes (EVC)
• Closes after TDC, allowing full expulsion of gases.
⏱ Typically closes 8–20° after TDC (ATDC).

🔁 Valve Overlap

Occurs when both intake and exhaust valves are open at the same time (near TDC between exhaust and intake strokes).
This helps improve airflow and engine efficiency at higher RPMs.

📈 Why It Matters:

A mistimed valve event can cause:
• Poor fuel efficiency
• Loss of power
• Valve damage
• Backfiring or misfiring

That’s why engine timing must be set precisely—using timing belts, chains, or gears.

14/06/2025

Vehicle Speed Sensor (VSS)
The VSS measures the speed of the vehicle, providing data for cruise control, transmission shifting, and ABS systems.

Types:
- Magnetic VSS: Uses magnets to detect wheel rotation.
- Optical VSS: Uses light beams to detect wheel rotation.

How to Know If It's Faulty:
- Erratic Cruise Control: Unreliable cruise control operation.
- Transmission Issues: Erratic shifting or delayed shifts.
- Check Engine Light (CEL): Illumination of the CEL.
- ABS Malfunction: Faulty ABS operation.
- Speedometer Issues: Inaccurate speedometer readings.
- Engine Stalls: Unexpected engine stalls.
- Erratic Acceleration: Uncontrolled acceleration or deceleration.
- Increased Fuel Consumption: Higher fuel usage.
- Black Smoke from Exhaust: Indicative of rich fuel mixture.
- Erratic Braking: Unreliable braking performance.

Related DTC Codes:
- P0500: Vehicle Speed Sensor Malfunction
- P0501: Vehicle Speed Sensor Range/Performance Problem
- P0502: Vehicle Speed Sensor Low Input
- P0503: Vehicle Speed Sensor High Input
- P0504: Vehicle Speed Sensor Intermittent/Erratic

14/06/2025

Gearbox components

14/06/2025

Chevrolet C/K, specifically a second-generation model produced between 1967 and 1972. It is most likely a 1971 Chevrolet K10. The "C" denotes two-wheel drive, while "K" denotes four-wheel drive.

14/06/2025

Toyota’s New Engine Tech Sends Sh0ckwaves Through the EV Industry

14/06/2025

14/06/2025

Honda is advancing the development of its next-generation hydrogen fuel cell module—fully designed and built in-house—with a goal to cut costs by 50% and double the durability compared to the previous model. Mass production is expected to begin in 2027. Delivering 150 kW of power and boasting over three times the volumetric power density, the compact, high-performance module is also intended for use in stationary Fuel Cell Power Generators.

Power Output: 150 kW
Volumetric Power Density: Over 3× increase for a more compact, flexible design
Efficiency: Up to 59.8%
Voltage Range: 450–850V
Mass Production: Set for 2027

14/06/2025

Common Car Starting Issues and How to Troubleshoot Them
Read more: https://autoveteran.tech/blog/details/197/common-car-starting-issues-and-how-to-troubleshoot-them

Car starting issues can occur due to various reasons, leaving drivers stranded and wondering what went wrong. In this comprehensive guide, we will explore some of the most common car starting problems and provide step-by-step troubleshooting methods to help you get your vehicle up and running smoothly.

14/06/2025

Learn about the 4-pin relay: its applications in headlights, horns, cooling fans, and starter motors, and how to correctly wire it for optimal performance in vehicles.

14/06/2025

Your Vehicle’s Doctor Now Fits in the Glove Box with CRP123 V2.0 Elite
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