I have aquired some good information, granted the information i will share is not new, hidden or secret but at least you will have the chance to have all the information i needed to complete this swap without having to go elsewhere, i.e. searching the forums for days.
first piece of information is:
Mirages from the following years have 2 separate ecu's one controlling the engine and the other the transmission: 1997-1999.
therefore the wire harness on these vehicles are different from those made in 2000 and above, Mitsubishi decided to consolidate ecu's and making one, and calling it a PCM, found in 2000-2002, (manual trans from all years kept a separate ecu) so keep this in mind when swapping engine's from different years and knowing what you will get into before interchanging years.
Second piece of information:
1.5 engines or 4g15's have various different sensors and solenoids than a 1.8 or 4g93 so a wire harness swap along with the engine swap would be a better/cleaner "bolt-on swap" to avoid a possible electrical nightmare.(I have done both engine wire harness and under dash/interior harness on this build to virtually cancel out any rewiring configurations (it seems someone in this forum has used alternate ways but you can follow their swaps for alternate ways or other versions of swaps.)
third piece of information:
when wanting to do this 4g15 to 4g93 swap you will need to following parts from a 1.8l car:
1: 1.8l throttle cable (the 1.5l cable is shorter and will not fit in its respective bracket on the intake, modding your old "1.5" cable will work, its up to you though)
2: 1.8l pressure and return coolant hoses, (4 total) both from the firewall and both from the radiator. the firewall ones are longer on the 1.8 and the radiator ones are just plain different.
3: 1.8l power steering pump mounting bracket, its plain different.
4: 1.8l power steering pump upper hose, its longer and angled to clear the pulley as it seems to sit higher than the 1.5l p/s pump.
5: 1.8l wire harness A/from the same vehicle year B/from another vehicle year along with its PCM if interchanging years97-99 swapping to 00-02 and vice versa.
6: 1.8l MAF sensor/intake trac, the 1.5l uses it in a completely different location* look at build for details (uses MAP)
Now that you know, and knowing is half the battle i will show you how simple this swap really is, granted you have all the parts mentioned above.
*dont forget this is used as a guideline and im just showing you guys my experience, what worked for me and in no way am I guaranteeing the same outcome for you, every car has its on quirks that need to be treated differently*
remember, I will not go over every step during removal/re-installation due to the fact that if you decide to perform this task then you should have somewhat of a basic knowledge of mechanical skill. i recommend following an FSM or field service manual for any hard to understand tasks to avoid breaking expensive parts and to save time while removing and putting stuff back in.
here is the 2001 mirage w/1.8l pulled in the garage to remove its engine and keep ready for a 4g63 swap, the 1.8l engine will go into my 1999 mirage you will see as we progress.
I begin tearing all the surrounding parts off and disconnecting the wire harness from the engine.
while removing the stuff i noticed the 1.8l MAF sensor is located differently than that on the 1.5l. so i kept this part and transferred it.
more removal, nothing special so no details on that.
I used a ratchet strap rated @ 5000lbs to remove the engine and trans.
removed engine
wire harness mess.
here's the engine pulled and ready to be washed
drenching it in engine degreaser
ready to push this one out to the backyard and bring in the 2dr 99 coupe w 4g15, remove it and swap the 4g93
heres the 1.5, same deal one more time...
removal,same process...
almost ready to come off...
pulling out the 4g15, again no details as its just removal and theres nothing special about it... so far...
alright so when removing the wire harness there is a plastic tab held by a stud in the firewall/cabin side. pain in the ass to get the harness out, you need to put a long wrench thru the wireharness hole in the firewall, lay the wrench on the stud, to make it sit on the stud in the inside and hammer the wrench from the engine bay, to bend to crap that stud, to make clearance and life easier to remove that harness.like so:
now to completely remove the remaning mess of wire, you need to manipulate your way thru the brake lines, easiest way was to remove/loosen the following lines shown:
this was tedious work
finished:
ordered me some goodies while i was working on the cars
dropped in the 4g93 overnight, now thats fast huh?
I tryed swapping p/s pumps but the banjo ends where different, I could of replaced the whole hose as well, but at the moment I decided to keep the hoses, so ill be using the same pumps, just need to swap out brackets as so:
year specific problem: my 1999 had a different connector for all accesories than the 2001 harness i put in, so i had to depin the connector, swap it and repin to the corresponding locations, please follow your maintenance manual diagrams, as i cant ensure similarities for different years.
swapped 02 sensors
this is what you have to look out for when you install the bracket, note the 2 p/s pump hoses and its shapes, the 1.5 wont clear the new pulley's location.
just had to clip everything else together in the engine bay, and this is how she looks now:
Last thing is I swapped instrument cluster because they somehow retain the odometer reading, its not the ecu that stores the mileage count.
Nothing further will be done to this car as I gave it to my wife. My build will be a 4 dr mirage to evo 5. I will start that thread as soon as my clip arrives.
