rapserv
4M41 injectors
my brother is looking at replacing the injectors in his 2003 Pajero and I was wondering if, once he has replaced them, does he need to somehow tell the ECU of the new injector codes? :?
andrew.ashton
Re: 4M41 injectors
Hi rapserv,

At 2003 that is still non-common rail. So just mechanical injectors, not piezo electric injectors.

AFAIK the ECU would not have any capability of accepting or any use for knowing anything about the injectors.
rapserv
Re: 4M41 injectors
andrew.ashton wrote:Hi rapserv,

At 2003 that is still non-common rail. So just mechanical injectors, not piezo electric injectors.

AFAIK the ECU would not have any capability of accepting or any use for knowing anything about the injectors.
Hi Andrew,
Thanks for the reply and good to know that he's not going to run into any configuation problems with the ecu :)
Henno
Re: 4M41 injectors
I am new to this forum so bare with me.
I have a 2000 Pajero swb with seized 3.2did engine. I found a 2012 3.2did 4m41 motor but the injectors have electrical connections that the old motor do not have. I believe these connections are for electric injectors and my current ecu will have no clue how to manage.
Does this mean I have to search for an older model 4m41, as new the ecu is expensive to purchase.
Please advise
User avatar
Affiliate Member
Re: 4M41 injectors
the 2003 model is electronic injection pump. It has parameters in the pump for injector deviances but mostly it is not needed.

Just replace them as a set that has been calibrated as a set so they have the same pop and delivery rate.

@Henno : you cannot interchange a common rail 4m41 with a pump injection 4m41. The one with the electrical connections is a common rail engine out of a triton or gen4 pajero. The one you are looking for is out of a gen3 pajero.
Henno
Re: 4M41 injectors
hi there
the guy I am buying this 4m41 (gen4) from is now telling me that he can do the modification by changing my diesel pump (from gen 3) onto new motor, apparently he has done 4 engines like this in the past with no problems. Can this be successfully done or is this just sales-talk
andrew.ashton
Re: 4M41 injectors
Henno wrote:hi there
the guy I am buying this 4m41 (gen4) from is now telling me that he can do the modification by changing my diesel pump (from gen 3) onto new motor, apparently he has done 4 engines like this in the past with no problems. Can this be successfully done or is this just sales-talk
Hi Henno,

I would not consider myself and expert, but AFAIK:

1. Gen3 pump, Gen3 (mechanical) injectors, no common rail and Gen3 ecus all work together.
2. Gen4 pump, Gen4 (piezo) injectors, common rail and Gen4 ecus all work together.

I don't see any way that you could mix and match any of this.
User avatar
Affiliate Member
Re: 4M41 injectors
changing the engine electrics is hard enough.

You must remember that the Traction control, engine, ABS, transfer case and gearbox electronics are all talking to each other.
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