2.0 Turbo Management

[peter 20]

Basicaly what the title says,I have found This ecu on ebay im asuming its for a n/a 2.0 605 however it has the vacume tube which i thought was only for the turbo cars?But checking the part number i dont think its a turbo ecu.The question is thought will it work anyway?Im thinking this because it is the same type of management knock sensore on a very similar engine.Oh and it isnt a coded one.

 

 

Thanks

Edited March 22, 2006 by peter

[Henry Yorke 269 3 Cars]

I think the tube is for the MAP sensor as it is an integral part of the ECU, not a remote sensor. Not 100% sure though, but I know my 2.0 ECU has this and it runs on a pipe from the bottom of the throttlebody on my XU9J. Usually it runs from a pipe on the inlet manifold on the XU10J engines

[peter 20]

Yeah it goes to the inlet manifold on th xu10,so am i correct in thinking that it should run the turbo engine fine?Or am i missing somthing like the lamda sensor or does it have that aswell?Im sure there will be a difference but i cant find out what.

 

cheers

[Henry Yorke 269 3 Cars]

406 (4 wire heated IIRC) lamda sensor will be required too to adjust the fuelling otherwise it will just run rich. Been there and done that!!

[peter 20]

Well the lamba sensor is on my car so you recon it will work then?

[peter 20]

I've been thinking and the ecu will run a non turbo engine fine, so the only difference is the turbo and there isnt actualy any more wiring is there?I mean there isnt actualy a boost pressure sensor is there and even if thats not connected (if there is one) the engine WILL run however the fueling may be totaly out and im thinking it will run lean yes im geting desperate

[M3Evo 0]

I'd guess that the on board MAP sensor in the ECU will only sense -ve manifold pressures which is all an N/A engine ever sees.

 

When the manifold pressure goes positive i.e. you're on boost, the ECU won't know and so will not supply extra fuel or retard the ignition to deal with the additional air flow.

[peter 20]

That makes sense but is there any other way it would increase the fueling ie the lambda sensor etc obviously not air flow as it doesnt have an afm but you get the idea.

 

looks like ill just have to hunt for an ecu then

[M3Evo 0]

The lambda would probably increase the fueling a bit, but it'd always be playing catch-up if ya know what I mean.

 

With the MAP sensor (that can read positive pressure) the ECU knows to add extra fuel under boost, and to retart the ignition too.

 

Relying on the Lambda to do that would mean running mega lean until the sensor had decided it was time to tell the ECU to add more fuel, then to compound the problem, the Lambda gets ignored above light cruise conditions anyway so it wouldn't be telling the ECU to add fuel when it's most needed.

 

It's not really practical IMO

Edited March 22, 2006 by M3Evo

[DrSeuss 0]

No! You can't.

 

Have you got a locked ecu? And the corresponding wiring loom?

 

I'd not even begin to try pissing around with mixing and matching ecu's it just won't work.

 

I know of a company that can decode your ecu for £50-60 quid iirc. Still needs a keypad though.

[peter 20]

No i dont have an ecu i did have a none coded one but thanks to a short in the loom is totaly knackerd.There is the possibility that i can get hold of a coded ecu then to get that decoded unfortunatly i have a non keypad wiring loom (early xm model) however i am quit confident if the ecu is de-coded you dont need the keypad etc i have decoded an ecu with a keypad and you can just junk the key pad.But this was on a vts similar i dont know.They are easily decoded though but you need a car that runs and on the same management with a keypad.

 

Yes i can see how the n/a ecu wont work i was hoping that by some miricale it would have the same parts as the turbo ecu that were just not used or i could just swap parts around etc

 

If only i could aford a megasquirt and i wish someone would buy my wheels then maybe i could lol