03 q45 Supercharged

[Yoder2]

Hi everyone ,

I have owned a 02 Q45 for the last 5 yrs. Basic mod's nothing crazy. I totaled it a month ago and a week ago replaced it with an 03 premium package Q45 that's supercharged. 83000 miles on it. I'm having concerns with the transmission. Any advice would be great. It's a hard shift between gears 2 and 3 only. Thanks

James

[EdBwoy]

Well, welcome to the forum. Start by checking the fluid level/ condition to see if it is burned. However, since it is not uniformly malfunctioning, I would attempt a fluid drain to see if there is any metal in the fluid from the transmission internals?
I assume no check engine light or pending OBD codes?
Just never know how hard the car has been driven, with the extra pep it carried under the hood.

To go a little off topic, do you mind sharing a little more about the car? If I remember correctly, very few supercharged Qs existed, and information has been scant about them. Most were made by an outfit called Keuylian in the West Coast. If you could post some pictures, especially of the engine bay, that would be really cool.

[Yoder2]

Thanks for the response. I'll change the fluid today. That was on my list along with the coolant. So from what the previous owner told me before purchase is that a professional baseball player owned the Q first and that he is the one that had the car modified in WA state. It's 1 of 5 Q45's that had this package installed which included the supercharger (you were right about the name) body kit which is a dual exhaust rear bumper , side skirts, and new front bumper and grill, big brembo break kit, and lowered . That's all that im aware of in terms of upgrades. I gladly upload some pics.....how do you do that exactly on this site ?

[EdBwoy]

To know to post pics, try this:
1. howto-post-your-images-in-threads-t573706.html
or
2. how-to-post-pictures-using-photobucket-t521110.html
I've posted posted photos for other members who didn't intend on posting many pictures and didn't want to go through the process of setting up accounts in photo hosting sites, so if you're interested I can do that for you.

[HansCC]

To know to post pics, try this:
1. howto-post-your-images-in-threads-t573706.html
or
2. how-to-post-pictures-using-photobucket-t521110.html
I've posted posted photos for other members who didn't intend on posting many pictures and didn't want to go through the process of setting up accounts in photo hosting sites, so if you're interested I can do that for you.

you this web service and it will crated the links for you - use the 2nd link in the bunch and modify your post using the "Img" button on the toolbar -

[HansCC]

Yeah - post some pics!!! G50 with supercharger - wow - didn't know they existed

[Yoder2]

Yes I'd love to. I can email them to one of you and you can post them for me??!! I'm kinda just waiting to get my new wheels on and wrap job done before sending pics. This is happening in the next week or so. However if you want engine bay pics that I can do asap just let me know where to send them @EdBwoy

[EdBwoy]

[REDACTED]
And I'll make it happen. Of course we'd love all the pictures of the car in its current glory showing the bodykit and wheel/brake package etc, but we'll take what we can get

How's progress on the transmission issue?

[Yoder2]

Transmission seems to be good. Just did a 50% drain and also added Lukus transmission additive for hard shifts, previously used on my 02 Q45, which works very well. Coolant change as well, mass air flow sensor clean with a new air filter. Fresh oil change and I feel it will be good to go. I haven't done rear diff inspection so that might be next.....thoughts? Spark plugs are on the list

[EdBwoy]

Courtesy of Yoder2:

The Keuylian aesthetic treatment


And this is the money shot

[HansCC]

Shes a beauty - thanks for sharing - Only 5 of these?

[O5Q45]

Was there any technical info released on this mod? Any idea what this did to horsepower and 0-60?? Also, anyone know a part number on that nismo supercharger? I'd definitely like to know where that came from.. the VK45DE is used in the super GT even recently if I'm not mistaken.. I'm wondering if that's part of how they got 550hp in the super GT with the VK45 series.. that is a very special Q you have there.. I'd probably put it in the garage! I'd guess the only other one you could easily locate is in the Nissan Heritage Museum in Los-Angeles.. where could I find more info on these 5 Q's?

[Yoder2]

The supercharger is actually just nismo badge. The company that makes it is Keuylian out of California. It's a 1.7L supercharger adding 100hp on top of the 340hp stock making it a 6.2L 440 hp SLEEPER! I don't know the 0-60, stock was around 6sec, but I have not taken it to the track to test it out. If I do I will certainly post my results! Thanks Edbwoy for posting these for me! And yes I was told there were only 5 made with this package, supercharger, brake kit, body kit, etc...

[EdBwoy]

You're most welcome man.

Glad to see the fluid change sorted out the shifting issue. Did the old fluid appear burned? Otherwise, these transmissions don't break often.
And I wouldn't discourage any fluid replacements in a car if you don't have the maintenance history on that.
For spark plugs, I've got 3 letters for you when it comes to this era of Nissans - NGK! But, since you're FI, please let us know what spark plugs it's running.

Also, I would like to know what they did about the ECU. With a pool this small, I wonder how many cars we can get and how easily we can replicate these efforts by reverse engineering or other means.

[Yoder2]

So how would I find out information about the ECU? Take it to the dealer?

Also what's the rear diff about? My local dealership recommend a it but I'm not sure about doing it. Thanks

[Yoder2]

Another thought here .....my Q has been stalling out upon start up. Today was twice. Owned it 2 weeks now for a total of 5 occurrences. Thoughts?

[EdBwoy]

So how would I find out information about the ECU? Take it to the dealer?

Also what's the rear diff about? My local dealership recommend a it but I'm not sure about doing it. Thanks

The rear differential would be in the same line of changing old fluid. Not a bad thing to do, easy to do so you could DIY it. (Remember to open the fill plug first, just to make sure you can refill the thing after you drain it). Or you could let the dealership do the dirty work for you.

On the ECU, I suppose the dealership could read the serial number on the ECU, but not necessarily run any updates that could wipe out any prior programming. I think they can quickly tell if it's an OEM unit.
Also, I believe a dedicated tuner could do the same for a fee.
The cheapest route that comes to mind is to just remove the glove box and see if the ECU has any identifying marks on it.

Another thought here .....my Q has been stalling out upon start up. Today was twice. Owned it 2 weeks now for a total of 5 occurrences. Thoughts?

Is it doing this mainly on warm starts? What is the idle behavior and how many RPMs does it idle at?

[Yoder2]

Idle around 800rpms. It's done it on warm starts actually. The first occurrence was day after I bought it pulling out of my garage . It has done it twice after I have been driving it and just stopped somewhere really quick and restarted. MAFS code went off so I cleaned that. Now no code but still stalls. It starts right up after a stall out ....odd

[EdBwoy]

That's odd indeed.
I've had idle issues where the car would stumble and die only for warm starts (and consistently too, no stumble then act normal deal like yours). If I jabbed the gas pedal while the RPMs were still going up at startup, I would trick it to stay running. Of course, that gets old and I had to do the idle air relearn procedure.
Have you done anything to the throttle body?

[Yoder2]

No I have not. I was trying to think of all the components related to air and fuel that I could either clean or replace. I will be doing the spark plugs like you recommend here shortly. So your thinking throttle body

[EdBwoy]

It's not that you necessarily need to do anything with the throttle body, I mentioned it because it's usually a big contributor to idle issues.
If you replace it or you clean gunk off it then the throttle plate settles at a different position, then the car needs to be retrained on what the zero throttle reference point is.

[Yoder2]

OK cool. Local car shop do that or would you recommend infiniti dealership?