Hey Guys i'm very new here and i've had this problem for about a year now and i need help, so il jump into it..

got a 2007 IS250 from a co worker for $300 bc they were moving.. they said the car ran really rough.... it blew the engine when i drove it home...

i bought a used JDM 4GR Engine and decided to install myself. ive installed 3 engines into my rx8 (IYKYK) and helped my buddy with his car so i feel i mechanically could do the job

My ORIGINAL ECU!!! got damaged from water spilling on it, so used the jdm one..

my car will go into acc mode but will not CRANK..

i replaced :
Battery
crankshaft position sensor
all fuses and link


idk if i need to get the vehicle specific ECU from flagship one or im missing something but im so lost in this project

if anyone did a jdm swap and can tell me how it went that would be amazing

hope you guys can help!!

 

Can you post the original ECU and replacement ECU part numbers? I can only imagine you need US designated unit in there and then program it.

 

yes the JDM ECU is #89666-22070



it looks like the one i need is VIN specific and it is # 89661-53820


i'm buying it tomorrow so we will see. i cant imagine it being anything else. the dealership mentioned it was a 8k job but i think we all know how easy it is to change this part

 

Check the fuel pressure sensor. You can buy one for like 20 bucks. It's a used car so even if it isn't that, you will be doing yourself a favor replacing it anyway.

 

i just read that the other day! ill buy it now and see if that will work. thank you so much

 

Start reading here on what to do for an ECU swap.

https://www.clublexus.com/forums/is-...ml#post8983391

 

Thank you for the link! his car cranks but wont start.. my wont crank at all just acc mode and thats all


i think i have the wrong ECU in so i bought a new programmed one so lets hope! ill keep you updated

 

Bro indeed did not keep us updated. Did you ever get around to it?

 

Check your grounds, specifically the ones that clamp up to the spot behind/below the intake air filter box