I currently have a 2006 Evo MR, but unfortunately had purchased it with a spun rod bearing and needed a new motor. I found a good low mileage Evo 7 complete motor to swap in for a good price, which the shop did everything beautifully.

The only issues I'm having are since it's a Evo 7 motor, the MITEC isn't hooked up and disabled through ECU. I'm not exactly sure what all the shop modified on the ECU to make it work, but they set my max boost to 11PSI since the car wasn't fully tuned as a precaution.

Until I'm able to get a real proper tune, I just want to make sure the car is running like it should to be safe... I installed AEM Boost and AFR gauges which currently reading - 10 to - 14/hg vacuum at idle, is that what it's supposed to be at? I believe I might have a small boost leak... But previously my idle was sitting around -14/-16hg. Is this normal? Or what issues do you think I might be looking at so I know exactly what to check.

My AFR reads around 15.2 at idle kinds bounces up and down and reads 11-12 WOT and 14.5ish when cruising. I believe those are pretty accurate correct?

Im also curious that if I disconnect my battery for 15+ minutes to reset the mapping, would that cause the MITEC and everything the shop disabled to prevent limp mode and any CEL to reset also? I don't have evoscan or anything yet, but I'm working on getting it soon. I just don't want to mess up anything the shop did and prevent my car from running properly or at all..until then lol.

Sorry if my post is a bit confusing, everything is kinda scrambled in my head and in trying to explain everything at once 😂😂. Let me know if you have any questions to help better diagnose and I'll answer to the best of my knowledge.

 

Just because I am curious, why did you chose to replace the motor with an Evo 7 motor?

 

I bought the car from a dealership out of state and it had mechanical problems so it was extremely cheap, had a loud ticking noise. Was hoping it was just bad lifters but of course it was a spun bearing. Had the car towed to a shop and they gave me a estimate of $11000 to rebuild the motor, which I was initially going to do but a bunch of personal issues came up and my son was born so I didn't have the money to go that route anymore. Car literally sat at the shop for nearly 2 years and I luckily happened to come across a complete Evo 7 swap with under 20k miles for a extremely good price so I decided to get it and had the shop swapped it. They took a good chunk of the labor cost away since I let them keep the old engine (block was basically toast and needed to be bored). The car already had a bigger intercooler, 5 speed swap and ACT clutch. Was much cheaper and honestly didn't mind not having MITEC anyways.

Owned another 06 MR stock before this one, but ended up getting rid of it. Isn't really much of a noticeable power difference between them and I figured I'll eventually build my motor anyways so it didn't bother me.