Just joined Z4 forum after many years running, attempting to fix & racing MGF’s MK1’s I have finally purchased first Z4. And wow, what a difference. I have concluded that no matter how much you play around with the F’s VVC engine a straight six enters a new dimension of fun, especially in the Z4 as I have found out last few days since picking her up.
But anyway, I was hoping that somebody who knows a little about Z4’s could have a look at the rather detailed description of what had to be done to the Z4, especially concerning the retro fit of a M43 ECU for the reason given in the description.
She runs spot on so I would conclude that the various mods completed to accommodate the ECU are good.
The description below is pretty much as was from the seller who seemed to know at bit or two about the work done although I can’t be certain and in away hence the post.
She is going on the ramp next week for a full inspection of rear end bushes, subframe as there is a thud under excessive pull away and a few other issues all of which I was aware of a very much reflected in the price.
I would be grateful for anyone’s comments or feedback, as dabbling in things I am yet to learn about is never a good idea.
LY03VZB REG
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Sellers description.
Welcome to the advert for my BMW Z4 3.0i
I will start off by saying that this car was purchased with the intention of keeping for a long time and turbocharging in the process. I have owned the car from 12/12/2020.
Recent work just completed:
- Diffrential Bush ( Powerflex PFR5-4626)
- X8R Complete Full Vanos repair kit (Rocker cover gasket was included in the kit so was replaced aswell)
- X8R Disa Valve repair kit (Valve was not actually broken however I wanted to future proof it)
- MS43 ECU & wiring loom.
The original ECU had an issue where oil and engine coolant where going up the witing loom and into the ECU and the coolant had over time corroded the pins and it would throw out codes, not want to start or misfire badly. As I knew I wanted to turbocharge rather than try and find someone to remap an MS45.1 which is the ECU originally in a Z4 e85 I decided to retrofit an MS43 from a e46 as this has been turbocharged so many times and there is many people who if you fit the turbo kit with necessary upgrades can very easily tune the car for you.
This has been done to a very high quality by myself. (I owned a vehicle service centre for over 7 years and I know a little about cars)
This retrofit meant that I also replaced:
- Oil pressure sensor (this is where the oil was leaking from and going up the wiring loom into the ECU)
- Thermostat & housing (There is an electrical switch on the thermostat as this activates it and coolant was going from this plug top ECU)
- Air flow meter (A Air flow meter for a Audi/VW turbo has been fitted as it gives a much wider reading compared to the stock Z4 ecu and allows for when the car was to be turbocharged. Wiring has been added to the air flow meter plug as the MS43 ECU is a 3 pin plug flow plug where as the new one is a 4 pin). The air flow meter is curently not plugged because the ecu needs to have some changes made to the Air flow reading chart due to the upgrade. Reason I have not done this is 1. I wanted to do this at the same time I was to upgrade the injectors and 2. car runs perfectly well as it is.
- Ambient air temperature sensor added as the MS45 ecu took reading from air flow meter (there was a place for the sensor already just needed to be put in and plugged in)
- Rubber air hose after air box replaced as it was cracked (common issue)
- MS43 ECU was remapped to 250bhp before it was fitted to the car and the thermostat opening temperature was lowered by I believe 5 degrees which I was told by the person who mapped it that helps a vast amount if you decide to take the car on a track day
- Multiple services have been carried out while car was in my procession.
- Engine compression test was carried out when I purchased the car and even though it has high mileage all cylinders had good compression
- Comes as original with the 18inch BBS split rims
RamAir air filter fitted (bottom half of air box kept in order to aid with heat soak)
- MS43 ECU was remapped to 250bhp before it was fitted to the car and the thermostat opening temperature was lowered by I believe 5 degrees which I was told by the person who mapped it that helps a vast amount if you decide to take the car on a track day
The rear subframe bushes could do with replacement as if you do take off more agressively you can feel a jerk from the rear
The AC unit works however the A/C compressor clutch switch wire has not been wired in. I did not have the information on exactly where it needed to go to after the wiring loom exchange and I have not looked into it..
End
But anyway, I was hoping that somebody who knows a little about Z4’s could have a look at the rather detailed description of what had to be done to the Z4, especially concerning the retro fit of a M43 ECU for the reason given in the description.
She runs spot on so I would conclude that the various mods completed to accommodate the ECU are good.
The description below is pretty much as was from the seller who seemed to know at bit or two about the work done although I can’t be certain and in away hence the post.
She is going on the ramp next week for a full inspection of rear end bushes, subframe as there is a thud under excessive pull away and a few other issues all of which I was aware of a very much reflected in the price.
I would be grateful for anyone’s comments or feedback, as dabbling in things I am yet to learn about is never a good idea.
LY03VZB REG
--------------------------------------------------------------------------------------
Sellers description.
Welcome to the advert for my BMW Z4 3.0i
I will start off by saying that this car was purchased with the intention of keeping for a long time and turbocharging in the process. I have owned the car from 12/12/2020.
Recent work just completed:
- Diffrential Bush ( Powerflex PFR5-4626)
- X8R Complete Full Vanos repair kit (Rocker cover gasket was included in the kit so was replaced aswell)
- X8R Disa Valve repair kit (Valve was not actually broken however I wanted to future proof it)
- MS43 ECU & wiring loom.
The original ECU had an issue where oil and engine coolant where going up the witing loom and into the ECU and the coolant had over time corroded the pins and it would throw out codes, not want to start or misfire badly. As I knew I wanted to turbocharge rather than try and find someone to remap an MS45.1 which is the ECU originally in a Z4 e85 I decided to retrofit an MS43 from a e46 as this has been turbocharged so many times and there is many people who if you fit the turbo kit with necessary upgrades can very easily tune the car for you.
This has been done to a very high quality by myself. (I owned a vehicle service centre for over 7 years and I know a little about cars)
This retrofit meant that I also replaced:
- Oil pressure sensor (this is where the oil was leaking from and going up the wiring loom into the ECU)
- Thermostat & housing (There is an electrical switch on the thermostat as this activates it and coolant was going from this plug top ECU)
- Air flow meter (A Air flow meter for a Audi/VW turbo has been fitted as it gives a much wider reading compared to the stock Z4 ecu and allows for when the car was to be turbocharged. Wiring has been added to the air flow meter plug as the MS43 ECU is a 3 pin plug flow plug where as the new one is a 4 pin). The air flow meter is curently not plugged because the ecu needs to have some changes made to the Air flow reading chart due to the upgrade. Reason I have not done this is 1. I wanted to do this at the same time I was to upgrade the injectors and 2. car runs perfectly well as it is.
- Ambient air temperature sensor added as the MS45 ecu took reading from air flow meter (there was a place for the sensor already just needed to be put in and plugged in)
- Rubber air hose after air box replaced as it was cracked (common issue)
- MS43 ECU was remapped to 250bhp before it was fitted to the car and the thermostat opening temperature was lowered by I believe 5 degrees which I was told by the person who mapped it that helps a vast amount if you decide to take the car on a track day
- Multiple services have been carried out while car was in my procession.
- Engine compression test was carried out when I purchased the car and even though it has high mileage all cylinders had good compression
- Comes as original with the 18inch BBS split rims
RamAir air filter fitted (bottom half of air box kept in order to aid with heat soak)
- MS43 ECU was remapped to 250bhp before it was fitted to the car and the thermostat opening temperature was lowered by I believe 5 degrees which I was told by the person who mapped it that helps a vast amount if you decide to take the car on a track day
The rear subframe bushes could do with replacement as if you do take off more agressively you can feel a jerk from the rear
The AC unit works however the A/C compressor clutch switch wire has not been wired in. I did not have the information on exactly where it needed to go to after the wiring loom exchange and I have not looked into it..
End