Need Help

[StormR34]

Good day everyone, I'm new to this sight and I'm not even sure if I'm doing this right or posting this in the right section or not. I have a skyline r34, it has the rb25det neo motor, I have an issue that nobody can seem to solve, please can someone advise or give help. I'm from south africa and we don't get the skyline this side so I had to import mine, so not many guys have experience in fixing this car. Firstly the car was stock.when I came to upon this issue the car would loose power like it dropped a valve but it would happen.every now and again, I had it checked out I was told my spark plugs were wrong so I did research on sights got the right plugs and even gapped it to 0.8mm the car ran fine for awhile then the same issue returned about a month later, I then replaces the coils, once again it worked for a month then the problem returned, some said my ground of the car was not right. I sorted that out but the problem was still there, I then changed my injectors found out one was faulty. The car worked fine for about 3 months then the issue came back and shortly after that the piston melted and the xonrod shot through the block I replaces the motor and put a spitronics management system in now my engine light doesn't want to go offend the new motor is giving the same problem. I don't know how to.fix this issue. Please some advice would be great.

[StormR34]

Please excuse the mistakes I'm using my cellphone to type and big fingers small buttons. :-) I submitted before proof reading

[PranK]

Hey StormR34 and welcome to SAU!

You're best off asking your questions in the technical forums as this forum is just for introducing yourself.

Good luck!

[StormR34]

Thanks will do. The skylines are well like there in Australia u guys have the best insight on the car from what I have read

[PranK]

Thanks will do. The skylines are well like there in Australia u guys have the best insight on the car from what I have read

Saying that will get you a long way on these forums!!

[PatMol]

First off stay out of boost until you have a handle on what is going on with the car.

Two start eliminating problems.
Check fuel pump and fuel pressure.

Use multimeter to check earth's

Your check engine light is triggered by the ecu.

Trace the wireing to your ecu and double check every single pin on the ecu harness vs the plug on the engine.

Read the ecu manual to see if it's doing something daft.

Get your car on a load bearing dyno and post a dyno graph.
With Afr and boost.