Lexus IS250 3GR-FSE Swap - Possible???
05-31-22, 09:37 AM
#136
Superchargef 3gr fse
Swap was completed a few days back but could not get any coolant delivered 😩 as toyota are on lockdown.
so yesterday i filled it with halfords pink long life, should be ok for now.
fitted my modded front headlights and 2015 style bumper this morning and took the car around the block a few times to get it all up to temp
It all seems fine apart from some funky smells i think is just oil burning off the exhausts etc.
ive not really give it much stick yet as i need to top up my auto box as i lost a little fluid, also now on order from toyota.
i have decided to run with my standard ecu for now just to get some miles on the engine etc
but i will also be doing some live data with my el cheepo obd scanner just to check what sort of fuel trims im getting ( and then figure out what they mean)
i can 100% guarantee this is a straight forward swap
i have done this on my own with a standard halfords socket set 😜 and it has taken me a little over 3 short days.
im well happy
so yesterday i filled it with halfords pink long life, should be ok for now.
fitted my modded front headlights and 2015 style bumper this morning and took the car around the block a few times to get it all up to temp
It all seems fine apart from some funky smells i think is just oil burning off the exhausts etc.
ive not really give it much stick yet as i need to top up my auto box as i lost a little fluid, also now on order from toyota.
i have decided to run with my standard ecu for now just to get some miles on the engine etc
but i will also be doing some live data with my el cheepo obd scanner just to check what sort of fuel trims im getting ( and then figure out what they mean)
i can 100% guarantee this is a straight forward swap
i have done this on my own with a standard halfords socket set 😜 and it has taken me a little over 3 short days.
im well happy
08-01-22, 02:50 AM
#137
2nd gear
Join Date: Aug 2022
Location: Greater Manchester
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hi everyone, i am 1 day into doing this swap on my 2006 is, i havn’t hit any major hurdles yet 🤞,
i will be lifting the old engine and box out tomorrow as the engine had a small noise that im not overstruck on hearing and thought this would be an ideal time to step up to the 3L.
i see what people are saying about the ecu not having enough scope to run the 3gr but i was also under the impression that our ecus wasn’t tunable or am i wrong, i have the engine ecu that came with my 3gr engine and im contemplating (once the engine is all back in) at hooking up the 3gr ecu, can anyone tell me why i shouldn't.
sorry to revive an old thread im just looking for any ideas.
TIA
i will be lifting the old engine and box out tomorrow as the engine had a small noise that im not overstruck on hearing and thought this would be an ideal time to step up to the 3L.
i see what people are saying about the ecu not having enough scope to run the 3gr but i was also under the impression that our ecus wasn’t tunable or am i wrong, i have the engine ecu that came with my 3gr engine and im contemplating (once the engine is all back in) at hooking up the 3gr ecu, can anyone tell me why i shouldn't.
sorry to revive an old thread im just looking for any ideas.
TIA
I have an Automatic RWD 2008 is250, I'm looking to drop in a 3GR from an auto GS300, which is pretty much what you've done right?
I'm hoping it's literally a case of one engine out, one engine in, fire her up and she's good to go, but I have a few questions:
1) Is there anything I should change on the new engine before putting it in? Most people seem to change flywheels etc, but noticed these are 6MT not auto.
2) If I want to use the 4GR ECU do I also need to swap my 4GR inlets etc to the 3GR block? Most engines seem to come with all of these already attached so seems a waste not to use them, but I'd rather swap my old parts on than have to mess with wiring and ECUs.
3) Did you have to map your ECU in the end?
4) Where did you find your engine?! I'm getting offered a few, but they all seem a bit shady when it comes to verifying mileage.
5) Any downsides so far?
Any tips appreciated! Thank you!
03-19-23, 04:36 PM
#138
3gr swap
I think the 3gr-fse engine will work using the electronics from the 4gr fse, I have done some research and found that the injectors, mass airflow, AFR sensors throttle body, fuel pump, cams and all the sensors are all the same so it should work just like factory, I confident that it will I went out and bought a 3gr-fse for myself to swap it in the is 250. Nothing try nothing done, I will put it in near the summer cause I am working 7 days a week for now
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Jahseriah (04-14-23)
04-13-23, 07:30 AM
#140
What transmission is in your is?
I have a 04 crown athlete I'm wanting to make manual.
3gr-fse to manual.
I should be able to use my ecu no?
Did you need any special adapter plate or did it just bolt on?
Thanks
I have a 04 crown athlete I'm wanting to make manual.
3gr-fse to manual.
I should be able to use my ecu no?
Did you need any special adapter plate or did it just bolt on?
Thanks
05-13-24, 03:04 AM
#141
05-13-24, 04:13 AM
#142
i did install the 3gr ecu but it wouldn’t start the car due to an immobiliser mismatch,
i have now sent my 3gr ecu to a company in russia to have it mapped and paired back to my car, but as i have now found out the 3gr engine uses a separate cooling fan ecu which has a trigger wire from the engine ecu back to the cooling fan ecu which i have got to wire in for the fans to work.
pressuming you have the immobiliser unit from the same car as the engine once you have done the 45 minute ecu handshake it should in theory start and run the car.
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GeorgeSeb (05-13-24)
05-13-24, 09:48 AM
#143
As for a manual swap, I'd start with a 4GR manual ECU. If your car was an auto, you'll have wire harness replacement and/or alterations to do as you can't just remove the auto trans leaving the ECU no one to talk to.
05-13-24, 10:07 AM
#144
What i will say to anyone doing the swap, if you can use the 3gr ecu use it as the map is soooo much better for midrange torque, as the vvti kicks in much lower, rather than when running the 4gr ecu they kick in around 4500rpm
i sent my ecu to a company called all4swaps in russia,
i now have quicker gear shifts, more torque, extra 15bhp and faster throttle response.
they are absolute magicians with toyota and lexus engines and electronics.
i sent my ecu to a company called all4swaps in russia,
i now have quicker gear shifts, more torque, extra 15bhp and faster throttle response.
they are absolute magicians with toyota and lexus engines and electronics.
The following 2 users liked this post by Mattyc007:
2013FSport (05-13-24),
GeorgeSeb (05-13-24)
05-13-24, 10:55 AM
#145
What i will say to anyone doing the swap, if you can use the 3gr ecu use it as the map is soooo much better for midrange torque, as the vvti kicks in much lower, rather than when running the 4gr ecu they kick in around 4500rpm
i sent my ecu to a company called all4swaps in russia,
i now have quicker gear shifts, more torque, extra 15bhp and faster throttle response.
they are absolute magicians with toyota and lexus engines and electronics.
i sent my ecu to a company called all4swaps in russia,
i now have quicker gear shifts, more torque, extra 15bhp and faster throttle response.
they are absolute magicians with toyota and lexus engines and electronics.
Question. When you say quicker shifts are you implying the shift points occur at lower speeds or perhaps that the operation of paddles lost the lag or delay the 2IS chassis is known for? As in, it shifts when actuated instead of second later later?
So, you are happy with the swap and everything works with no CEL?
05-13-24, 11:38 AM
#146
Hi, yes much faster response with the paddles , and much quicker change in general,
absolutely no check engine lights after the swap. Mine has been in now since 2020, i installed it during lockdown. (Probably took me on my own) 3 days start to finish with an engine hoist, a load leveller and a halfords professional socket set.
i have now got to change my gearbox but that is nothing to do with the mapping of the ecu, my gearbox was not great before the swap and i read all the comments about oil changing a high mileage gearbox and finally bit the bullet and done 4-5 oil changes, now wish i hadn’t .
i have a new box just waiting to get it on the ramps.
absolutely no check engine lights after the swap. Mine has been in now since 2020, i installed it during lockdown. (Probably took me on my own) 3 days start to finish with an engine hoist, a load leveller and a halfords professional socket set.
i have now got to change my gearbox but that is nothing to do with the mapping of the ecu, my gearbox was not great before the swap and i read all the comments about oil changing a high mileage gearbox and finally bit the bullet and done 4-5 oil changes, now wish i hadn’t .
i have a new box just waiting to get it on the ramps.
The following users liked this post:
GeorgeSeb (05-13-24)