Thread: Brand new D2 auto trans.....Need help!

Originally Posted by discorevy

boost pressure will read low on nanocom due to boost box , have you got a boost gauge and what is max on that ?
do you know for sure the transfer case ratio is the same as the old one ?
did you have a low stall converter fitted?

Yep I'm running a boost gauge. It will get to its 23 psi when i kick it down and it goes really well. But off idle the boost will rise slowly. Before i could
put the boot in off idle and with in an instant i would get full boost. Now it just creeps up slowly and blows smoke while my EGTs rise quickly. If i give
it anymore then quarter throttle from idle it will hardly go anywhere and just blow heaps of black smoke. Almost as if it is being held back a bit like a hand brake staying on when you take off.
The transfer case was taken off a D2a V8 I parted out with 155,000km on it. Was working perfectly fine before i took it out. And i think the torque
converter is a standard one. I'm thinking this might be the problem but i just don't know. I'll leave it to them to sort out.

yep , looking like torque converter / auto fault , do a stall test to confirm , you could also try taking off manually in first to see if thats better on your way to taking it back.

Originally Posted by discorevy

yep , looking like torque converter / auto fault , do a stall test to confirm , you could also try taking off manually in first to see if thats better on your way to taking it back.

I'll give that a go tomorrow and see how it goes.
Cheers
Chris

Originally Posted by Slunnie

Yes, but that’s 1.72bar over ambient. I’d expect this is an absolute value because if the motor is blowing black smoke it’s definitely not getting 1.72 bar into it. 0.72 bar boost would be approx correct for part throttle and no load.

Certainly hope this is the case. My Nanocom is about on par with my boost gauge and only peaks at around 1.2bar. It did over boost at around 1.25 bar.

Ok i still haven't had a chance to drop it off but was told to disconnect the boost box and see if that makes a difference. It is now disconnected and runs even worse. I'm not sure if the pin is making proper contact back to the ecu as i had to take it out when connecting it to the boost box. And it was a bit bent and out of shape when i pushed it back into the ecu loom.
TEST1 is with the boost box disconnected. I could hardly get it to make any boost down low. It was very doughy and sluggish.
This was on my drive to get some fuel. When i was doing a u turn on to the other side of the road it sounded like a CV or something was making noise.
It just never ends. Or a gear box i'm not sure.

TEST2 was on my way back home with the MAF disconnected and still no boost box. Still the same....GUTLESS
As i turned into my driveway there was more noise yet again. Like a clack clack clack sound. I am very much over it at the moment.

I think i'll have to get it towed back there tomorrow. I just don't trust it.

I'm sorry to hear you are having so much trouble,
Does the engine run ok and rev alright without smoking when it's in park?
Sounds like it might have some physical mechanical issues which may or may not be related.

Hi,
Yep it will rev smoothly at idle...A little puff of smoke but not huge like when you drive it.