Tell us a little about you. What cars you are interested, where you are from and why you are interested in learning to tune.
@Taz-Quinn-Walshe. I have it since 2011. I wanted to be ahead of corrosion. Especially at the front strut towers, this is a common place were rust occurs. Mine has no rust, i like it to stay that way. :)
Yes it's certainly easier to do it before it is a problem, and the upshot is your car is now absolutley mint!
Very nice indeed!!!
Its hard to find good turners who can troubleshoot a problem and come up with the correct solution/s, rather than making guesses. I fully understand how your feeling as I have a RB25DET S2 project as well running Nistune.
I already have the software and started to get familiar with it but the training course has made me far more knowledgeable and have given me a lot more confidence in dealing Nistune and tuning in general.
Keep on searching, I am sure you will find and solve your problem soon.
Thanks for the reply.
I've got the nistune software this weekend and trying to get formiliar with it. It seems that i have already found something, that can be the problem.
The point were the VCT solenoid is activated is exactly @ the point of 3200 rpm @ a certain load. The rpm when cruising on the highway.
Now i also understand why the problem also accured @ all the gearing @ the same rpm. Even on idle when hitting the throttle.
I can see that the map tracer is going in and out the transition point where the VCT is enabled. Resulting in a very inconsistend behavior of the engine. Also the Short term fuel trim @ that moment is becoming sky high (20%). I also have the android version of Nissan data scan, before i had Nistune. I saw that the lambda was very lean @ that moment and that explains why the Short term fuel trim is so high.
When i have time i will disconnect the connector of the VCT solenoid and take the car for drive. When the problem is gone i will adjust the flags were the VCT comes in and hopefully the problem is solved. But before i do this i want to install a Wideband O2 sensor so that i know that everyting is ok. Now i'm operating a little bit blind without it.
Now using the software it's becoming easier to pin point problems because i can use logging. Before this it was guessing, now it's commen sense.
I really believe in being able to see what's going on with my engine, that's why I purchased the Nistune software for my Nistune ECU. I will agree that its not as sophisticated as a stand alone, seeing that it's just a daughter board transplant but it's really good for the level my project is at.
I am happy to know that you found the problem and having your Wide Band O2 sensor up and running is definitely a plus. I wouldn't do anything without it and it ties right into Nistune as well.
I am sure you are alot more confident now having figured it out yourself.
Let us know how it turns out.
I saw a RB25DET on YouTube with a variable exhaust cam gear and a Greddy MSS installed to control the VCT. What exactly does this do in terms of proformance and how does it affect the tune?