I installed a EU yesterday in my 98 Maxima, and I have one issue though with fuel at idle.

Issue #1: Nevermind, figured it out. Is anyone running a Z32 MAF with the EU? I tried selecting VG30DETT for my MAF, but it will not accept it in the menu screen, it just goes back to blank (stock). Anyone have a similiar issue? <-- It uses the same MAF type as the VG30DETT already, that is why you cannot select it.

Issue #2: I'm having a problem with injector lag time with my Z32 injectors. After doing a LOT of research, I came across 2 answers for lag time on Z32 370cc injectors, .58ms, and from calling Deatsch Werks, 1.4ms. I tried both, and the issue I am having is running way to rich at idle. At .58ms, I am running at 11-12 AFR. At 1.4ms, I run at 10-11 AFR. I tried playing around with the lag time, but I want to set it correctly, not guess.

I am running 370cc Z32 injectors cleaned and balanced by Deatsch Werks. They tested between 411cc-418cc at 43.5psi. I am running stock fuel pressure (34psi). Anyone have any suggestions? I would think that the stock ECU would compensate, but the AFR is staying really rich. I do not have any adjustments programmed into the EU that should be affecting idle (or anything below 50% throttle for that matter). Do you have to set your stock injector size and lag time in the boxes for that info? I set the stock size in (260cc) but it made no difference.

Other than that, car starts and runs fine, albeit really rich. I am currently running version 2.20 on the software. We have to use the VQ30DET setting, does anyone know if this is actually using VQ30DET specs, ie a different MAF and injectors than the A32 Maxima?

Thanks for any help, I'm eager to get out and start doing some tuning runs!

 

Not sure if this is of any help, but if I recall correctly, don't you have the option of tapping or intercepting the MAF signal? Which did you do? I haven't used or seen the software/interface so I am not sure how it correlates with the option but maybe that has something to do with it?

Not sure on tha A/F issue. But just from reading what you wrote, I would say it would have to be higher to make it leaner. But I really have no idea.

Good luck man!

 

You do have the option of tapping or intercepting, I intercepted the signal since I am running a Z32 MAF.

 

Just a quick update, I have the MAF issue figured out. The VQ30DET setting uses the NS_HW2 Hotwire MAF selection already, which is the same thing the VG30DETT uses, so it will not allow you to select it.

Thankfully, I used D-sub connectors like Dandymax recommended, so I disconnected the EU so that I can drive the car to work tomorrow. I'm still trying to troubleshoot the rich at idle condition, the injector setting issue has me stumped for now.

 

I guess I'm the first and only person to run larger injectors using the EU.

 

have you tried messing with your lag time in the i\j adjustment tab(IE setting them at like 2-3ms?) or your injector sizes in the perameters??

 

opps sorry didnt read your post entirely kinda just skimmed. but from what i have understood in the past is that you pretty much just have to play trial and error till you reach what you desire. but i could be totally off

 

I replied in the boosted forum..