I have an early model 2004 Z and I can not adjust my idle. I am getting ready to go FI and I want my idle set at a grand. I have tried at the dealer and when I installed my utec. No luck either time.

I need some other options.

I was thinking of picking up another ecu, possibly a late model 04 or 05 ECU that is non revup. My question is, would they be interchangeable? would my odometer read what the new ecu has for milage?

Does anyone have a better idea?

 

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1. your dealer is an idiot. Consult II can bump idle.
if they cannot, then you could get a Technosquare L-spec reflash and have them bump idle, raise rev limit, etc. and leave the AFR alone for your Utec to handle.

2. you can not interchange the ecus, your car-specific immobilizer code is with the car. Technosquare could clone your ECU if you want a spare.

3. Odometer reading (ie.e. milage) is stored in your Speedo Cluster it is not stored in the ECU.

 

+1^^^

Cipher can bump idle too, if you have a laptop...

http://www.alteredatmosphere.com/mm5...tegory_Code=FX

 

The dealer and Cipher cannot raise idle on 2004.5 cars (only 2003 to early 2004 and I think it may be possible again on later models, not sure there).

JWT has an idle "fix" on their website. The cheapest solution is to drill a hole in the throttle body valve very, very carefully. Find a thread that provides the size to drill to get a few hundred rpm bump.

 

The early '04 ECU is ULEV-I, the late '04s are ULEV-II. The biggest difference is that ULEV-II uses wideband O2 sensors. So, if you went with a newer ECU you would, at a bare minimum, have to replace all four OEM O2s.

I have an early '04 G35 (08/03 build) and Cipher can raise my idle with no problems.

 

The cipher couldnt raise my idle. My friend jeremy from performance factory tried. He told me that some early to mid 04's, where having this problem. My other friend at the dealer tried with the consult and that didnt work either.

As far as drilling a hole in my throttle body, that sounds like I am performing brain surgery. I dont know? What do you mean?


I didnt think you could switch ecu's, i thought they were car specific.

This technosquare reflash. Is it certain it would fix the problem. I would hate to send out my ecu spend how ever much it would cost to do it and it doesnt work. Has anyone had this problem and sent theirs out and it worked?

 

hey guys, before we call everyone stupid

the 04.5s wont raise the idle, even with the consult2.

the reflash is the only way to do it with certain models. it really sucks sometimes with a FI car that doesnt idle well...

i actually have a couple throttle bodies around the shop with holes in them, we experimented with a few things, it actually will get it to idle better if the car is idling poorly in some cases, basically its a controlled maf sensed vacuum leak


you can also change the ecus if you have a consult to key code it. cant just change them without it

 

Your right Jeremy, it was made in dec 03. So do you think that the throttle body route might be a good way to go at first?

The nissan tec said that my car was sound. That there were no codes nothing raised a flag anywhere. He can not figure out why my car was acting the way it was. He said go fi and the problem will reveal itself.

Hmmm.. Well I am going to go ahead and install it ASAP. We will just have to figure out the bugs when they arise. But before I do that, i kinda want the idle issue resolved. Its idling good now, but for some reason the utec and my car didnt seem to agree with each other. I am sure its only going to get worse than before when I go FI. It was already idling like crap before.


You said it was probably the cold air intake. Do you think it will act the same way with the TN kit?

 

Is this problem only with the UTEC? Everything properly grounded? Not sure what you mean that it is idling like crap now (even before FI). Perhaps something is wrong with A/F at idle. Check the AFR in both banks using Cipher. Do both banks read around 15 at idle?

 

its idleing good now now that its back to bone stock. when I had some mods done, and the utec installed at idle it was very rough and loopy. when driving and I would press the clutch the idle would drop to zero almost stalling and jump back up to 750rpms. but never hold at that rpm rate, it would jump up and down, wanting to almost stall but never actually doing it.

I don't know what the banks were reading. audible mayhem could answer that, he tuned my car.

 

i think the cold air intake and the dirty filter was the cause of the rough idle, i will play with it when he brings it in for the TN kit...


let me know when i get to hook it up stephen, i will see you soon!!


if it idles now fine stock, then we wont have any issues. i really think it was that cold air doing something strange

 

Right on, I am putting together the cash right now for the install. I am selling my rims and getting the last bit of cash together for the install. I am hoping to have it in your shop here in the next couple of weeks. I want it ready for HIN.

 

This is not new, this is a KNOWN problem, they even say so on uprev's website for the cipher.

+1 on the technosquare reflash, they will take care of you