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Volvo S70 98 K5.2 ECU in volvo 850R

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

arturjarn1
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arturjarn1

Volvo S70 98 K5.2 ECU in volvo 850R

Post by arturjarn1 » Sun Jun 18, 2017 9:32 am

Hey fam, need a little help. I found an ECU on ebay! Its from an s70 98 year model. 2.4l turbo. I have an volvo 850R 96. with m4.3. I would like to fit it on my volvo, is it m4.4 ecu ? Thx for help in advance.
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misha
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misha

Re: Volvo S70 98 K5.2 ECU in Volvo 850R

Post by misha » Sun Jun 18, 2017 11:37 am

'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon
'91 Citroen XM 2.0 SI /fully equipped/mandarine red metallic
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS

tryingbe
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tryingbe

Re: Volvo S70 98 K5.2 ECU in Volvo 850R

Post by tryingbe » Sun Jun 18, 2017 1:29 pm

arturjarn1 wrote: ↑
Sun Jun 18, 2017 9:32 am
Hey fam, need a little help. I found an ECU on ebay! Its from an S70 98 year model. 2.4l turbo. I have an Volvo 850R 96. with m4.3. I would like to fit it on my Volvo, is it m4.4 ecu ? Thx for help in advance.
Why?

Using M4.4 ECU on M4.3 car would result in non-working a/c compressor.

Using low pressure 2.4L ECU on a high pressure 2.3L means reduced boost, reduced power, wrong timing, and wrong fuel.

You already have a R ECU with the highest available boost on a stock car.
85 GLH, 367 whp
00 Insight, 72 mpg

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Clemens
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Clemens

Re: Volvo S70 98 K5.2 ECU in Volvo 850R

Post by Clemens » Sun Jun 18, 2017 2:26 pm

M4.4 is not really of any benefit for most of us. If you want more performance, get a new tune by a reputable tuner, but keep your R ECU as it is.
Summer: 1996 855 R
Winter: 1994 855 T5M
Donor: 1995 854 10V

arturjarn1
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arturjarn1

Re: Volvo S70 98 K5.2 ECU in Volvo 850R

Post by arturjarn1 » Mon Jun 19, 2017 10:56 am

if u try to tune the m4.3 ecu then ur a/c unit can burn, but m4.4 is better for tuning because it had better tuning settings that m4.3 has,im gonna remap it anyways, that why it dosent matter is it low pressure or high pressure and fuel ratio, and replacing m4.4 with 4.3 is very easy, u need to change a small amount of wiring to make it work, the question was, if it is truly motronic 4.4, if so, then u can remap it under any pressure and any fuel ratio !:) but thx for help guys!

tryingbe
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Re: Volvo S70 98 K5.2 ECU in Volvo 850R

Post by tryingbe » Mon Jun 19, 2017 1:18 pm

arturjarn1 wrote: ↑
Mon Jun 19, 2017 10:56 am
if u try to tune the m4.3 ecu then ur a/c unit can burn
Nope. Not sure where you got that idea from.
http://m43.wikia.com/wiki/M43_Wiki
arturjarn1 wrote: ↑
Mon Jun 19, 2017 10:56 am
replacing m4.4 with 4.3 is very easy, u need to change a small amount of wiring to make it work
Zero wiring needed.
http://m44.wikia.com/wiki/M44_Wiki

I suggest you read up.
85 GLH, 367 whp
00 Insight, 72 mpg

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erikv11
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erikv11

Re: Volvo S70 98 K5.2 ECU in Volvo 850R

Post by erikv11 » Mon Jun 19, 2017 1:58 pm

Ignore the K number, that's a 460 ECU (e.g., https://www.ipdusa.com/products/7758/11 ... -1994-1998) from a 98 LPT.

It will work great for flashing a 4.4 tune, but see the comments from tryingbe - make sure you know what you are doing.

m4.4 tune starts up quicker than 4.3, plus has the tuning advantages.
'95 854 T5-R, Motronic 4.4, 185k
'96 855 NA, 145k
'98 S70 NA, 220k (living out west)
'98 V70, T5 tune-injectors-turbo, LPT engine, 286k
'06 S60 R, 167k
'99 Camry V6 :shock: 125k
gone: '96 NA 850 210k, '98 NA V70 182k

Sommerfeldt
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Sommerfeldt

Re: Volvo S70 98 K5.2 ECU in Volvo 850R

Post by Sommerfeldt » Mon Jun 19, 2017 4:18 pm

erikv11 wrote: ↑
Mon Jun 19, 2017 1:58 pm
m4.4 tune starts up quicker than 4.3, plus has the tuning advantages.
Startlingly quick, actually, for us 4.3 users. :D Also, live monitoring of a whole bunch of stuff, full OBD2 compliance (and functionality), you can actually use OBD2 readers with smartphone apps, and so on.

- S
'96 855 T5, R bumper and spoiler, Koni Yellows & blue H&R springs all 'round.

arturjarn1
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arturjarn1

Re: Volvo S70 98 K5.2 ECU in Volvo 850R

Post by arturjarn1 » Mon Jun 19, 2017 4:33 pm

tryingbe wrote: ↑
Mon Jun 19, 2017 1:18 pm
arturjarn1 wrote: ↑
Mon Jun 19, 2017 10:56 am
if u try to tune the m4.3 ecu then ur a/c unit can burn
Nope. Not sure where you got that idea from.
http://m43.wikia.com/wiki/M43_Wiki
arturjarn1 wrote: ↑
Mon Jun 19, 2017 10:56 am
replacing m4.4 with 4.3 is very easy, u need to change a small amount of wiring to make it work
Zero wiring needed.
http://m44.wikia.com/wiki/M44_Wiki

I suggest you read up.
Idk where i got the idea from porbably read and understood it otherwise, so its not that hard to put a m4.4 on my 96 850R(italian)
erikv11 wrote: Ignore the K number, that's a 460 ECU (e.g., https://www.ipdusa.com/products/7758/11 ... -1994-1998) from a 98 LPT.

It will work great for flashing a 4.4 tune, but see the comments from tryingbe - make sure you know what you are doing.

m4.4 tune starts up quicker than 4.3, plus has the tuning advantages.
Yes, here in estonia i have a guy who has tuned alot of volvos, il probably let him do the flashing and remapping and so on.

So basically, i ordered the ECU, ? it just needs a 4.4 flash,new remap that will suit my setup under the hood and im golden? Is that correct? Ive only been a volvo owner for about a half a year and was only fixing it and restoring it before any big tuning upgrades, so please forgive me if i dont know what im talking about! Cheers ! And a pic of my car!
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erikv11
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erikv11

Re: Volvo S70 98 K5.2 ECU in Volvo 850R

Post by erikv11 » Mon Jun 19, 2017 6:25 pm

Sommerfeldt wrote: ↑
Mon Jun 19, 2017 4:18 pm
erikv11 wrote: ↑
Mon Jun 19, 2017 1:58 pm
m4.4 tune starts up quicker than 4.3, plus has the tuning advantages.
Startlingly quick, actually, for us 4.3 users. :D Also, live monitoring of a whole bunch of stuff, full OBD2 compliance (and functionality), you can actually use OBD2 readers with smartphone apps, and so on.

- S
Oh, right! Thanks for the additions.
'95 854 T5-R, Motronic 4.4, 185k
'96 855 NA, 145k
'98 S70 NA, 220k (living out west)
'98 V70, T5 tune-injectors-turbo, LPT engine, 286k
'06 S60 R, 167k
'99 Camry V6 :shock: 125k
gone: '96 NA 850 210k, '98 NA V70 182k

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