[Misfiring 3,000-3,200 RPM V36 VQ35HR]

24 minutes ago, GTSBoy said:

ECM is ECU. so you'll find it where the ECU lives in any Nissan.

MPS is a Mazda......

Yeah I realised after, had a few extra beers. Either way the only way I can seem to get the ECM updated and reflashed is by sending it oversees. These cars are so over complicated. Lol

[Misfiring 3,000-3,200 RPM V36 VQ35HR]

So my cats have been hollowed out and I was going to get some stainless high flows welded in. 

Oh also replaced the rear post O2 sensors and when I took the old ones out they stunk of raw fuel on the passenger side.

I haven't checked the Injectors and I havent checked the fuel pump whats the best way to do this (Pressure tester or?)

Where is the ECM And Mps located. 

Can these buts just be replaced by second hand units withought some sort of reprogramming?

 

 Thanks for the help much appreciated. 

[Misfiring 3,000-3,200 RPM V36 VQ35HR]

4 hours ago, DashyyPC said:

Nahhhhhhhhhhhhhhhhh.
Try Sinergy Motorsports in SA first. they installed and tuned their 300rwkw + SC 370gt sedan.

Call East coast customs here in brisbane (they used to do it that way you were suggesting) << Also im admin if VQ australia on FB so if you mention VQ aus to them, you will get a discount, Only speak to Rob.

 

Try Admin tuning If you want an E-tune. He sells the complete pack including cable, licensing etc.  

Best off doing those options rather then send your JPN ECU to USA.
 

Hey mate, cheers for the advice, Unfortunately It has already spent a whole week at Sinergy Motorsports and they said that the ECU need Reloading/flashing. They used to be able to do it by sending it to Main North Nissan and they could link up to Japan or something and do it. Apparently now they cannot do it as the consults have all been updated and either they cbf trying or they are just not knowledgeable at the dealership so they just refuse.

 

I'LL give you the Run down.

At cold start it revs upto 1900rpm then after 1 - 3 mins goes to 1500 then after 5 minutes it will eventually go down to 650-700.

The car seems to Vibrate or shudder when this happens until it is settled.

It feels sluggish and doesnt shift correctly and if you floor it will seem like its being held back. Also at coasting with light throttle it bunny hops and bounces up n down on the rpm.

After a while of driving and if i pull over and turn the car off then on again it start driving better. And will shift properly sound different in the exaust and drive alot smoother.

I have even tried reading the system with the BAFX obd2 scanner and torque pro and NDS3 and it wont connect.

I have changed the following.

Mafs

Spark plugs Ngk

All coils Hitachi

Coolant temp sensor

Both Vtc solenoids

All 4 cams shaft sensors

Pcv valve delete

Disconnected the Throttle bodies and cleaned them.

I am going to install a New battery tonight as the one it has keeps dying.

Also will be doing the Grounding kit.

Its really driving me crazy. 

[Misfiring 3,000-3,200 RPM V36 VQ35HR]

Well I have taken the car to 6 mechanics 2 of which are specialized in vq motors.

Both of the mechanics have said that the ecu needs reflashing, now Not 1 nissan or infinity dealer in Aus is able to do it as all there diagnostic tools have been updated and has wiped the earlier infor or some rubbish. 

It has the High Rev out of sync with the shift points and just will not relearn the throttle bodies.  So I have done alot or research and that is my only option at the moment.

[Misfiring 3,000-3,200 RPM V36 VQ35HR]

Sorry for being that guy and digging up an old thread but I am at a loss.

I am over in South Aus and I'm wantimg to get the uprev tune.

No one here can do it so I would have to do the Mail in Ecu Uprev through Z1Concepts over in the U.S.

I'm worried that it wont be as "Plug and play" as they say.

 

Also could you please post pics of how you did the Earthing kit. 

My car is having all sorts of rough running issues and everything has been checked or replaced with new parts.

Cheers mate.