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Re: 2.4 l engine[S70/99] posted by Jan Ellwoth on
Friday, 2 April 1999, at 5:24 a.m.
Hi there, you have allready given the answer.
The engine is so new that NO tuning company has chip for the new Volvo engine systems yet!
When Volvo constructed the new ECM SW for -99 one issue was to make it hard for tuning companys to manipulated the engine managment system.
Volvo 850 T, T5R, R had Bosch Motronic 4.3.
Volvo 850 AWD, 2.5T had Bosch Motronic 4.4.
-98 S/V/C70 2.5-20V GLT, 2.5T (GLT in some countrys), AWD, T5 and R had Bosch Motronic 4.4,
Both systems are "easy" to tune compared to the new system in S/V/C70 and the S80 because their not a part in a network within the car!
YM99- Volvos with turbo has Bosch ME7 system with electronic throttel and variable exhaust camshaft and the ECM is a part in a internal network and communicates with CEM/CDM and that makes it very hard to manipulate the program in the ECM (EngineControlModule).
Volvos with 6cyl. engines also has the ME7 system but the variable camshaft is on the inlet side instead.
5cyl. 20V suction/aspirant engines has a new system from Denso and it has the same features as the ME7 for 6cyl. engines.
You can't take the ECM out of the car and reprogram it and put it back again. You have to reprogram the ECM in the car and at the same time reprogram the CDM/CEM (like a brain in the car).
So to make people aware of the fact that we have new eninge features in the -99 Volvos the name of the engines have been updated from 2.5 to a more correct 2.4!
BR / Janne
PS. Tuning and Supporting in the same meaning?
Janne tuned 854T-5R -96 (Volvo Car Corp. Gothenburg)
Re: 2.4 l engine[S70/99] posted by Paul Alsterfalk II on
Friday, 2 April 1999, at 11:07 a.m.
First my compliments to Mr. Ellwoth for his response on tuning for 1999- turbo cars. Since we get a lot of questions regarding ME7 tuning, my humble apologies for doing this but a reply here might clear some questions and reduce some kilobytes from our mailbox. Like mentioned in the previous reply, it is impossible to change chip or reprogram the ECU on ME7 equipped cars and to maintain diagnostic fuctions. To use Volvo Cars own words it's "Tamperproof". It's not even possible to remove the ECU without a special tool. I.E. each vital engine component has a PIN-code identity and if any of them needs a replacement a new software download is necessary from the Volvo service database. This download will either overwrite the ECU program or if the chip has been replaced, shut off the car. It's not even possible to take the car in for service if the mechanic connects the car to the terminal to shut off the service light. We have tested these ideas some 6 months ago but found it to be a dead end because of the mentioned problems. What we will introduce in the middle of this year for all ME7 cars including S80 T6, is an additional ECU that will work in combination with the original unit. During high engine loads, this extra ECU will override the signals from the original ECU to boost the hp and torque. To the customers, this new ECU will make it possible to tune ME7 equipped cars to similar results as previous models and with all service and diagnostic fuctions retained. The installation will be visible to the trained eye due to some external wiring and hoses but this is the best solution we can come up with, unless we will get approval from Volvo Cars to store upgraded programs in their database. One can always wish but...
Further information will be available on our website and from our distributors and dealers in the middle of this year.