The first generation of DSM’s included the Mitsubishi Eclipse, Eagle Talon as well as the Plymouth Laser. These vehicles were quite a bit ahead of their time, offering a combination of awd and turbo performance that was unparalleled in the early 90s. Even today the AWD version of the 1G is probably still the fastest way to run a 12, and still has plenty of modification value for a low price.
Powered by the robust 4G63T and an entire host of bolt on parts made for the car, the sky is truly the limit. But when it comes to the 1G mass air flow sensor, there’s one small limitation that the first generation Eclipse / Talon / Laser has that their younger 2G brothers do not. The Mass Air Flow (MAF) meter in the 1G 4G63 will overrun very quickly, especially when you turn up the boost and install larger exhaust components.
MAF overrun is the fastest way to ruin some turbo fun, and make the car undrivable. When modding your 1G DSM, make sure you plan ahead to avoid this problem by learning how to wire a 2G MAF in a 1G DSM.
The second generation DSM MAF is far larger and offers a better surface area ratio for air to pass through. This MAF has been proven to keep up with air flow required to put down well over 450 horsepower, so let’s get to wiring our 2G maf in a 1G.
If you need to wire up the 2G MAF in a 1G and aren’t comfortable working or soldering your wiring harness, there’s a few options for plug and play conversion harnesses. If you have a soldering iron and a little bit of patience however, you can wire this MAF into your 1G in under 30 minutes.
To learn how to wire a 2G MAF in a 1G, you’ll need to figure out what 1G MAF you currently own. This conversion also applies for Colt GT as well as Mitsubishi Mirage owners who are doing a 4G63T six bolt Swap.
For those owners as well as non turbo 4G63 1g owners, your MAF is the 1G Non Turbo MAF. Here are the MAF pinouts for the 1G non turbo DSM.
1G N/T MAF
1 – Air flow sensor (signal)
2 – MPI control relay
3 – 5V power supply
4 – Ground
5 – Barometric pressure
6 – Intake air temperature
If you own a traditional turbo 1G DSM, this conversion is a slightly different from the non turbo MAF. Remember you will be skipping PIN 5 on this plug as you tee into the upgraded 2G MAF.
1G TURBO MAF
1 – Idle position switch
2 – Air flow sensor (signal)
3 – MPI control relay
4 – 5V power supply
5 – None
6 – Ground
7 – Barometric pressure sensor
8 – Intake air temperature
Lastly you have the 2G MAF plug, and the wiring pinout for the MAF is below. Use these wires to reference which wires to connect from the ENGINE Side of your 1G MAF.
2G TURBO MAF
1 – 5V Power supply
2 – Barometric pressure
3 – Air flow sensor
4 – MPI control relay
5 – Ground
6 – Intake air temperature
7 – Volume Air Flow
How to convert from 1G Non turbo MAF to 1G Turbo MAF
Pin2 1g Turbo MAF => Pin1 1g NT MAF
Pin3 1g Turbo MAF => Pin2 1g NT MAF
Pin4 1g Turbo MAF => Pin3 1g NT MAF
Pin6 1g Turbo MAF => Pin4 1g NT MAF
Pin7 1g Turbo MAF => Pin5 1g NT MAF
Pin8 1g Turbo MAF => Pin6 1g NT MAF
How To Wire a 1G MAF to a 2G MAF
Pin1 1g Turbo MAF => ?
Pin2 1g Turbo MAF => Pin3 2g Turbo MAF
Pin3 1g Turbo MAF => Pin4 2g Turbo MAF
Pin4 1g Turbo MAF => Pin1 2g Turbo MAF
Pin5 1g Turbo MAF => Remember to skip this terminal
Pin6 1g Turbo MAF => Pin5 2g Turbo MAF
Pin7 1g Turbo MAF => Pin2 2g Turbo MAF
Pin8 1g Turbo MAF => Pin6 2g Turbo MAF
That does it for our How To Wire a 2G MAF in a 1G DIY Guide, if you have any questions regarding this guide or any questions about your 4G63T, leave them for us below!