mbc problem

[darren1976]

Trying set up my mbc no difference having the valve full open or closed still hitting the fuel cut

Any ideas please

[Colin Wiltshire]

If there is no difference to boost/performance if mbc is fully open or closed, then try to plum it the other way round.

When I had a mbc, I put it in the wrong way round, nothing. So swapped the tubes over, worked great then.

With fuel cut, the best way around that is to get a remap.

[darren1976]

Yeah I am hitting fuel cut out with it open or closed

Weird one

Arrow is point towards the engine

[Davezj]

arrow gerarally point to wastegate actuators. in most instruction say arrow to wastegate unless you have the instrutions that are printed wrong, some cheap MBC had bad instructions.

[darren1976]

I can try and report back

To set up you need to wind it all the way out to start with I guess

[Davezj]

it is one or the the other, just don't plant you foot after fitting it.
the best way to test if it is working is to put the car in 5th at 40mph and then press the accelerator and watch you boost gauge if it still rises to above 1.0bar wind it the other way, try it again. this will prove if it is working ok.
if you have not got a boost gauge installed you would be foolish to try and modify your boost level without a boost gauge fitted to monitor it .

[darren1976]

I have swapped everything round and getting peak boost around 1Bar still catching fuel cut out I have a walpro fuel pump to fit and been looking at hard pipes will this help with it hitting fuel cut out

[Davezj]

No, you will have to raise the fuel cut level via the ecu reflash. 0.9Bar should keep you out for fuel cut.

soa are you saying your MBC works correctly now?

[darren1976]

It's working kind of after testing migut need tweaking a bit more as its peaking at just above 1 Bar on boost guage and hitting fuel cut out the screw is nearly all out so not much adjustment I think but will keep trying as for remapping ecu I have a pfl legnum and not many people can map them what's a pain

[Davezj]

just turn the boost down so it doesn't hit fuel cut, when the outside temp gets higher you can turn up the boost a bit before hitting fuel cut again.

if you want to raise fuel cut via ecu then buy the gear to do it,
tactrix cable £130
MMC software to do the flashing on a 7201 ecu £100+
this is presuming you have a laptop.

it doesn't cost that much.

[darren1976]

Ok will make investment I think

[Davezj]

before you buy the tactrix open port 2.0 cable, look into obtaining the MMC software, as i don't know where you get this from.

give faxdie (jason) a shout and ask him where he got his from.

i have a 7202 ecu so have always used the free ECUflash.