2003 V70 wiring loom

Post by **RickHaleParker** » 05 Apr 2020, 21:56

B5244T3 83mm pistons, 90mm stroke, compression ratio 9.0:1, LPT.
B5234T3 81mm pistons, 90mm stroke, compression ratio 8.5:1, HPT.

Without knowing what the B5234T3 came out of, I would transfer the 2.4l wiring harness to the 2.3l to be sure it is compatible with the rest of the car.

The B5234T3 is a T5 engine, It will run with the LPT and the 2.4L software. Just don't expect it to run like a T5. Use the LPT unless you willing to get the ECM remapped for the HPT or hire Yagger to flash the ECM with the software from a 2003 V70 T5.

With the lower displacement, lower compression, 2.4 software, LPT, the 2.3 will have a little less power the the 2.4. If you just want something for a daily driver, it be OK. One advantage of this setup would be you can run lower octane petrol without knocking. You might even get better fuel economy then you did with the 2.4 because the ECM can run the engine with more timing advance then the 2.4 on the same grade of petrol.

yagger wrote: 28 Mar 2020, 21:14

kiwivolvo · Post by **kiwivolvo** » 05 Apr 2020, 22:13

would you recommend the ecu and turbo from the 2.3?

Post by **RickHaleParker** » 05 Apr 2020, 22:27

kiwivolvo wrote: 05 Apr 2020, 22:13 would you recommend the ecu and turbo from the 2.3?

I would not at this time because I do not know what the 2.3 came out of. The 2.3 ECM could be a Bosch Motronic 4.4 or a Bosch ME7. On top of that, a ME7 from another car may need to be married to the CEM. This is a question for Yagger or Doublebug to answer.

You are down to three questions:
1. Is the 2.3 ECM Motronic 4.4 or ME7?
2. Is a ME7 plug and play?
3. If not what will Yagger charge you to synchronize the software?

kiwivolvo · Post by **kiwivolvo** » 10 Apr 2020, 23:33

fitted motor, plugged in all wires, cranks over but no spark or communication on my snap on scanner

kiwivolvo · Post by **kiwivolvo** » 12 Apr 2020, 01:04

fitted motor, plugged in all wires, cranks over but no spark or communication on my snap on scanner

Post by **RickHaleParker** » 12 Apr 2020, 05:01

You are not communicating effectively. For example:
1. Which harness did you use?
2. Which ECM did you use?
3. Information on the donor ECM?
4. What did the 2.3 come out of?

Post by **SuperHerman** » 12 Apr 2020, 12:48

Disconnect battery. Check all your connections. Did you play with any of the modules? I forget their names, but the ones many remove in the black box on passenger side. A number of people have had issues with these not being seated correctly and experiencing your problems.

Communication errors are most likely an improper/incomplete connection. Recheck all work.

kiwivolvo · Post by **kiwivolvo** » 12 Apr 2020, 23:31

factory harness from my v70, factory ecm, dont know what the motor came out of

kiwivolvo · Post by **kiwivolvo** » 13 Apr 2020, 00:26

havnt removed anything

kiwivolvo · Post by **kiwivolvo** » 13 Apr 2020, 01:55

i have communication will all modules except engine and trans