Degradation of ground surface area in older cars honda city idsi 2003-2008

Honday City IDSI 2003-2008 model is really a good car and of course the fuel economy is the best of all cars during its era and even after 17 years of driving the engine still feel great as if it still can last for another 30 years without major issue. 

However, there is one problem about the car after it is getting older - the diminishing effectiveness of the grounding surface area around the engine bay and chassis. This is of course due to rust, engine oil spill, dust, dirt and grimes. 

The resistance is so great that as if the car engine bay electrical grounding surface area is divided into two parts - where the battery part has its own grounding, and the fuse box has its own as well when they supposed to be working as one entity. 

As a result, poor electrical connections have significant bad impact to the overall engine performance of the Honda City IDSI such as 

• Delay gear shift
• Pickup acceleration delay
• Consume a little more fuel 
• Sluggish engine performance and sometimes very loud
• Car jerking badly when stopping at the traffic light while braking on gear D (Drive)
• Having difficult to start randomly (As if the battery is dead) empty crank
• Door lock sometimes difficult to open / lock by the remote control key

The above problems arise when the engine sensors, solenoids does not have sufficient current flow to communicate with the ECU / ECM / PCM.

• On the transmission there are sensors and solenoids that must have enough current to communicate effectively with the TCM (Transmission Control Module)
• On the engine side
• MAP Sensor (Mass Absolute Pressure)
• MAF Sensor (Mass Air Flow)
• Coolant Temperature Sensor
• IAT Sensor (Intake Air Temperature)
• DDVT Solenoid
• Knock sensor
• Oxygen Sensor
• ISCV 
• Camshaft position sensor
• Crankshaft position sensor
• Evaporative valve solenoid
• Throttle position sensor

All the engine sensors require efficient flow of current to communicate with the ECU without delay so that injectors, spark plugs are working effectively for combustion inside the engine. This is indeed true after adding one good copper wire for grounding the following improved significantly and making it feels like having new engine.

1. Gear shift delay - solved
2. Pick up acceleration - improved significantly feeling can chase any high speed car.
3. Fuel consumption is better
4. Car jerk reduce significantly when braking on traffic light while on gear D