Emanage Ultimate assistance - larger injectors and MAF

**mtrai760** · 08-31-2008, 06:10 PM

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!

MOHFpro90 · 09-01-2008, 09:43 AM

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!

**mtrai760** · 09-01-2008, 09:46 AM

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

**mtrai760** · 09-01-2008, 10:42 PM

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.

**mtrai760** · 09-02-2008, 01:54 PM

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

locknuts · 09-02-2008, 03:15 PM

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??

locknuts · 09-02-2008, 03:24 PM

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

*DandyMax* · 09-02-2008, 08:29 PM

I replied in the boosted forum..