Lodi Neil Moto

Lodi Neil Moto INFORMATIVE CONTENT FOR MECHANICS
AUTOMOTIVE TIPS
CAR TIPS
(29)

Expert mechanics only🚘🚗
13/08/2026

Expert mechanics only🚘🚗

13/08/2026

Manual transmission explained🚘🚗

99.9% will fail! Expert mechanics only🚘🚗Which car part is this?
12/08/2026

99.9% will fail! Expert mechanics only🚘🚗
Which car part is this?

Name it ! 98% will fail🤔
12/08/2026

Name it ! 98% will fail🤔

11/08/2026

Discbrake installation Guide 🚘🚗

Expert only 🚘🚗
11/08/2026

Expert only 🚘🚗

10/08/2026

Cheap versus Expensive Car Suspension ,What is the Difference?🚘🚗

SPARK PLUG FIRING CONTROL (BASIC WIRING)🚘🚗 This diagram shows a typical electronic ignition system used on modern 4‑cyli...
10/08/2026

SPARK PLUG FIRING CONTROL (BASIC WIRING)🚘🚗

This diagram shows a typical electronic ignition system used on modern 4‑cylinder engines, with individual ignition coils (one per cylinder, also called “coil‑on‑plug”) controlled by an Engine Control Unit (ECU).



🧩 Key Components & Connections

- Battery: Source of electrical power; positive (+) feeds the main fuse, negative (-) connects to chassis ground.
- Main Fuse + Ignition Relay + Ignition Fuse: Protect the circuit and switch power on/off when the ignition is activated; terminal 30 = constant battery power, 87 = power output to coils, 85/86 = coil controlled by ECU.
- ECU (Engine Control Unit): Receives sensor data, sends IGT (Ignition Timing/Trigger) signals to each coil in the correct firing order; has power (+B), ground, and 4 output channels (IGT1–IGT4) for each cylinder.
- Ignition Coils: Each has 3 terminals:
- +B : Battery power input
- IGT : Signal input from ECU
- GND : Ground return
- Spark Plugs: Receive high‑voltage pulse from the coil to create a spark.



⚙️ How It Works (Step‑by‑Step)

1. Battery power flows through the ignition relay and fuses to the +B terminal of every ignition coil.
2. The ECU calculates the exact ignition timing and sends a low‑current IGT signal to the primary winding of the correct cylinder’s coil.
3. When the IGT signal turns ON, current flows through the coil’s primary winding and builds up a magnetic field.
4. When the ECU switches the IGT signal OFF, the magnetic field collapses instantly.
5. This collapse induces a very high voltage in the coil’s secondary winding.
6. The high voltage jumps across the spark plug gap, creating a spark that ignites the air‑fuel mixture in the cylinder.



📌 Terminal Functions

Terminal Purpose
+B Battery power supply to the coil
IGT ECU ignition trigger/control signal
GND Ground / return path
To Spark Plug High‑voltage output for spark



🎨 Wiring Color Code

- Red: Battery power (high current)
- Green: ECU control signal (low current)
- Black: Ground / return path
- Blue: High‑voltage output to spark plug



This design is reliable: it eliminates distributors, allows precise timing control for better fuel efficiency and lower emissions, and makes troubleshooting easier since each cylinder’s coil can be tested individually.


08/08/2026

How does a car suspension system absorb road bumps?🚘🚗

07/08/2026

Based on sound what
could be the problem?🚘🚗

Address

Pagadian City
7016

Telephone

+639465924166

Website

Alerts

Be the first to know and let us send you an email when Lodi Neil Moto posts news and promotions. Your email address will not be used for any other purpose, and you can unsubscribe at any time.

Contact The Business

Send a message to Lodi Neil Moto:

Shortcuts

Share

Category