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Volvo C70 99 4k rev limiter manual gearbox

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

ToMasz224
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Volvo C70 99 4k rev limiter manual gearbox

Post by ToMasz224 » Sun Jun 21, 2020 10:04 am

Hello
sorry in advance for my english but i use google translator..

I have changed the engine to 2.3T5 from C70 1999 ME7 in my S70. The engine and ECU come from the version with automatic transmission. Since then, the engine does not want to exceed 4k rev. I bought a second ECU from the version with manual transmission but the problem did not disappear. I changed the rev counter, ECU and do I need anything else to change? Where is the problem?

I also have a C70 2.4 with a manual gearbox and the revs there exceed 4k

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misha
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Re: Volvo C70 99 4k rev limiter manual gearbox

Post by misha » Sun Jun 21, 2020 1:28 pm

Problem is in CAN network which introduced in '99 with ME7 management.

You can't just swap ecu in these cars because they are "married" with the car.

They need to be re-programmed to match with your car and ALL other modules in the car.

It's a dealer thing,unless you can find some good tuner who can do this instead of Volvo dealer.
'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

ToMasz224
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Re: Volvo C70 99 4k rev limiter manual gearbox

Post by ToMasz224 » Sun Jun 21, 2020 3:50 pm

misha wrote: ↑
Sun Jun 21, 2020 1:28 pm


They need to be re-programmed to match with your car and ALL other modules in the car.
I understand. What if I take everything from one car to another? Is programming necessary then?

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misha
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Re: Volvo C70 99 4k rev limiter manual gearbox

Post by misha » Sun Jun 21, 2020 4:18 pm

Every single module in the car is connected with each other via CAN network.

Not possible!

What engine did you had in s70?
'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

ToMasz224
Posts: 7
Joined: Sun Jun 21, 2020 10:03 am
Year and Model: S70 99
Location: Poland
Has thanked: 0
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ToMasz224

Re: Volvo C70 99 4k rev limiter manual gearbox

Post by ToMasz224 » Sun Jun 21, 2020 5:12 pm

misha wrote: ↑
Sun Jun 21, 2020 4:18 pm
Every single module in the car is connected with each other via CAN network.

Not possible!

What engine did you had in s70?
The electronic scheme shows that CAN communication is between ECU, ETM, CDM and ABS. Everything was changed to the version with manual transmission.

I had the weakest 2.0 126hp Fenix5.2. I changed the wiring to the ME7 manual gearbox
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misha
Posts: 4403
Joined: Sun Dec 07, 2008 4:09 pm
Year and Model: '97 850 2.5 20v
Location: Serbia
Has thanked: 57 times
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misha

Re: Volvo C70 99 4k rev limiter manual gearbox

Post by misha » Sun Jun 21, 2020 6:12 pm

Does the car run good at all with new engine,ecu and wiring?
Is the only problem with it...not reving past 4k rpm?

It's not that simple....take a closer look at a diagram at the bottom.
All those CAN symbols goes through some module,not just those that you mentioned.
'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

ToMasz224
Posts: 7
Joined: Sun Jun 21, 2020 10:03 am
Year and Model: S70 99
Location: Poland
Has thanked: 0
Been thanked: 0
Poland
ToMasz224

Re: Volvo C70 99 4k rev limiter manual gearbox

Post by ToMasz224 » Sun Jun 21, 2020 11:05 pm

misha wrote: ↑
Sun Jun 21, 2020 6:12 pm
Does the car run good at all with new engine,ecu and wiring?
Is the only problem with it...not reving past 4k rpm?

It's not that simple....take a closer look at a diagram at the bottom.
All those CAN symbols goes through some module,not just those that you mentioned.
The car works without a problem. No DTCs. Everything is correct except for the rev limit and lack of power above 4k rev. The module at the bottom is an OBDII disgnostic connector, it has no effect on the other modules

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misha
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Joined: Sun Dec 07, 2008 4:09 pm
Year and Model: '97 850 2.5 20v
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Re: Volvo C70 99 4k rev limiter manual gearbox

Post by misha » Mon Jun 22, 2020 2:19 am

I don't have the answer to your question,except that there might be loss of communication in CAN network.

Live data diagnostic should be performed and then you will see what is the problem.
'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

ToMasz224
Posts: 7
Joined: Sun Jun 21, 2020 10:03 am
Year and Model: S70 99
Location: Poland
Has thanked: 0
Been thanked: 0
Poland
ToMasz224

Re: Volvo C70 99 4k rev limiter manual gearbox

Post by ToMasz224 » Mon Jun 22, 2020 3:47 am

misha wrote: ↑
Mon Jun 22, 2020 2:19 am
I don't have the answer to your question,except that there might be loss of communication in CAN network.

Live data diagnostic should be performed and then you will see what is the problem.
What does live data diagnostics mean?

User avatar
misha
Posts: 4403
Joined: Sun Dec 07, 2008 4:09 pm
Year and Model: '97 850 2.5 20v
Location: Serbia
Has thanked: 57 times
Been thanked: 144 times
Serbia
misha

Re: Volvo C70 99 4k rev limiter manual gearbox

Post by misha » Mon Jun 22, 2020 4:39 am

Live parameters from all sensors while engine is running and while driving the car...TPS,O2 sensors,Maf,ETM...etc.
'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

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