Should my my airflow map be maxxed out?

[ian_s14]

Im driving a 97 240sx and have emanage blue installed, although its now a gold. Im also using emanage tools and logging my runs. I have run into a problem. My car is running lean under boost from 12.5 to 14.5. But i maxed out the airflow map in mid to high rpms. Here is a compressed screenshot of my map. Im using stock injectors, stock s15 turbo same as s14. FMIC, walbro fp, megan header, hks exhaust, greddy suction kit, hks actuator, z32 maf. Im tuning off the maf currently. Im running stock 7psi and i am at about 3000ft but i cant see why im adding so much fuel in my map and its still lean given basically everything motorwise is stock.

[Turbineguy]

I'm not to savvy on the E-manage in particular but I'll throw out some general fuel injection stuff. When you add fuel but there's no change in your AFR several things can be the problem. Maxed out injectors are one possibility. Can you look at injector duty cycle on your logs? Thats the fastest way to identify that issue. You can max out injectors for more than one reason. Either they can't phsically flow enough or theres a problem with either the fuel pressure regulator that doesn't allow the fuel pressure to rise with manifold pressure or theres a pump problem. Can you log fuel pressure? If not disconnect the vac line to the FPR and see if anything changes. Be careful though as this will cause it to run very lean under boost. If the MAF voltage is maxed out the ECU will not add fuel once the voltage quits rising. Some tuning software lets you set the maximum grams per second flow rate and you may need to raise this if possible. Your issue sounds like either the FPR is not working properly or the MAF settings need to be adjusted. Are the stock injectors from a turbo car or from an NA car with added turbo. If they're from an NA car it's very possible they are maxed.

[Dzaster]

If the computer and injectors are NA version than turbineguy's suggestions to log MAF voltage and injector duty cycle is the way to go. Is this a recent project bus untuned or has it been tuned but recently started running lean like this for no apparent reason. Also, do you not have the injector harness as well? It would be better to add fuel through the "Additional Injector Map" instead to minimize ignition timing change--occurs when using airflow adjustment to adjust for fuel.

You may also need to clamp the airflow meter signal and tune off the Greddy MAP sensor if you have that. If you don't hen you may be kinda stuck here.

Also, if you dont have the injector harness wired in you won't be able to datalog injector duty cycle either. It's really a good idea to have the optional stuff for this unit. There are cheaper alternatives to getting the optional stuff for this unit--move around some wiring on the main harness, GM MAP sensor, etc.

[ian_s14]

Hey thanks you guys for the good info. I have been unable to reply until now but i will be able to from now on. Anyways i do have the additional injector harness. After upgrading to the gold firmware it enables me to log injector data. My injectors were running at around 80%. Not good i kno. They are the stock injectors for the s14 notchtop i kno for a fact. So for an update of the problem. I checked my fuel pressure and it was only at about 26psi with the vacuum line plugged in. I read in forums it should be around 43psi with the line unplugged and whatnot. I upped it to that while the car was running and took it for a drive and it was running way rich which is good so my maxed out fuel map can be lowered. After that i pulled into a parking lot and when the fan kicked on the car died. It would not start unless i put the fuel pressure back to 26psi and back to square one. I have an optima redtop and it hasn't been fully charged and im thinking this may have something to do with it. With it fully charged and the alternator in good condition should the car be able to start and run at any fuel pressure? (well between 26psi and 45ish)

[maxgtr2000]

Are you sure about the fuel pressure stats? Sounds like stock fp would be 26 psi and wot would be about 45. Stock injectors with the z32 maf might be your problem right now because the larger maf is telling the ecu there is less flow so it may be cutting the stock injector pulse causing it to die. You would have to increase some values in the idle rpm boxes on the airflow map. Best thing to do is get the injectors you will run with for boost and start tuning from there.