On Road Engine Tuning - MS2 Extra

I still not satisfied with my current engine tuning, as the fuel consumption still at the high side.

I'm aiming something like RM0.15sen/km or even lower for 50% mix urban and city driving condition. Right now my FC is about RM0.18sen/km. Normally I do not high rev, kept the RPM below 2500 per gears. So I do think the target is still achievable for 1.8L 4G93 DOHC Manual.

With the innovate LM-2 WB O2 sensor attached, I begin to tune my car on the road. No budget to go for dyno, sad.

Megasquirt ECU attached with notebook and innovate LM-2 Handheld unit in action.

Wooohoo... start to drive... thanks for my friend to become driver. His car is a monster Proton Gen2 Mivec Turbo GSR. Hope next time got change to post his car here :P

AFR So near to the stoichiometric which is 14.7

Dirty engine bay....So wish the turbo will be fitted inside one day... keep dreaming :P

Meter Assembly Fix

My Junk Wira Odometer was spoilt recently where the trip meter is not running.

As I had a spare odometer, so I decided to swap it myself during the weekend.

Dismantled meter assembly:

Rear view of the meter

Empty meter slot

Front view of the meter

Cover removed

Faulty trip meter due to loosen gear

Rear view of the odo meter, speed sensor is not attached in my car since I'm using megasquirt ecu which is not needed here.

Replacement meter clock 187xxxxkm @@

I managed to do some trick by adjusted the trip meter backward to 8xxxxx km, try to fool myself. My car is now ultra low mileage for a 15years old car :P

Deng Deng Deng. Finished, trip meter working well now :D

DIY Custom AL7075 T6 aluminium 4G93 conrod

This is a customized CNC machined alu 7075 conrod for Mitsubishi 4G93 engine from my friend.

DIY Megasquirt ECU Conversion

This is my first attempt to create a so called "DIY" car engine management control unit for my junk Proton Wira.

I've choosen the well-known opensource ecu kit developed by Bowling & Grippo, the Megasquirt Electronic Fuel Injection Computer. The name MegaSquirt sound lusty but eventually it's not, the squirt is meant the injection of fuel but not the others that you might thought about.

Car Model: Proton Wira
Engine Code: 4G91 + 93 Block
ECU: Megasquirt

History of my junk car:

This car was bought new by my dad back in 15 years ago. This car is Wira 1.3L displacement with Mitsubishi carburetted 4G13P engine from factory. The car was stock standard for many years until I took over 3 years back.

The stock standard 4G13P 1.3L SOHC Carburetted:



The engine condition of the car was degraded over 12 years of operation when I took over it as my daily drive. I was decided to transplant the engine to a newer and upgraded displacement 4G91 DOHC 1500cc imported as junk from japan which I found on the junkyard around. The new engine is in great condition as the cam is still shining under the cover. The engine eventually fitted in my car, but it's still carburetted.

4G91 DOHC 1.5L Carburetted:




Few months later, I was not satisfied with the performance of the new engine, I bought a 1.8 SOHC engine block and MMC injection kit from newer stock wira 1.5. The car was admitted again for operation, now the car was fitted with a new 1.8L block and fuel injected.

Engine Transplant in progress:



Refurbished Engine Head Cover:




Almost to finish:



1.8L Injection Engine Take Place:




The performance and fuel consumption is not right after matching the 4G15P ecu in a 1.8L engine. Due to very limited budget, I've decided to build my own ecu to fit in my car. Here is the start of megasquirt conversion take place.

Megasquirt Kit bought from US:








Kit in assembling:










The Messy engine bay wiring:





Mitsubishi DSM 1G 4-2 CAS Sensor replacement:



In car wiring fxxked up and re-routed:




Finished product:





Megatune Tuning Setting:

VE Table:



Ignition Table:



Real time Data Logging



Tuner Studio MS Virtual Gauges：








Essential tuning tools: Innovate LM-2 Wideband O2 sensor