Need help KA-T problem

[lsxavier]

I have an S14 with turbonetics kit controlled by safc2.The car runs fine with this set up.Today i changed the MAF(Z32), injectors(555 deatshwerks), and theECU(enthalpy).I started the car checked the a/f at idle and it's good(14.5-15.1)As soon as i drive the car, the car stalled.I just put new ngk spark plug in there and it turned black.I changed the plugs again and let it idle, the plugs turns black.I changed 3 set of plug already.My a/f is steady at around 10.0-10.5 right now at idle.By the way i took out the safc2 cause i now have the enthalpy ecu.The injectors and maf are brand new.Any advice would be greatly appreciated.Thanks

[coolbone28]

Maybe an intake or vac leak?

[spooled240]

So it idles ok but stalls when you rev it up to drive it? Seems like your engine is running way too rich when accelerating if your plugs are black.

[myRed240]

Check your MAF wiring... maybe one of the wires were mixed up?

[S13FX]

Let's start simple. May sound like a dumb question but I'm curious.

Is your Enthlapy tuned for 555cc injectors and Z32 MAF?

[lsxavier]

The ecu is tuned for z32 maf and 555 injectors.

[coolbone28]

well start with the obvious things like leaky injectors and maf wiring.

Did it run good at first and just turn to crap once you drove it? Did you go into boost at all? Have you checked for intake/boost/vac leaks yet?

Can you rev the engine up while in neutral?

[480sx]

No reason to take out the safc if you put in an enthalpy. Heck, if you still had it installed you could lean out your idle and drive it to figure out whats going on. Also, enthalpy tends to run a little rich, so if you wanted to get into it you could lean it out a bit more. With a wideband, Enthalpy and a SAFC you actually have a pretty nice tuning system.

Other than that, these guys have all said it, check your maf wiring and check for a leaky injector.

Did you verify that your fuel rail holds old pressure without leaking into the intake manifold? Whenever i change injectors out i always leave the rail off of the intake manifold and prime the pump a few times with a paper towel underneath. If you find a wet spot on the towel, you know that your injectors arnt sealed in the rail itself.

Also, did you buy used injectors? If so, make sure you didnt buy one thats stuck open. If so try this, get your car to idle, and pull off each injector clip one by one. If you find that one of the plugs you pull off does nothing to effect the cars idle, then that injector is stuck wide open.

[lsxavier]

I couldn't drive the car out of my driveway causeit would stall. The car ran fine with the old set-up(370 injectors, stock maf,safc2 tuned). When i changed the maf, injectors, and the ecu, that's whenthe car started stalling and fouling the plugs. I'll check the injectors and the maf again tomorrow.Thanks

[lsxavier]

I took out the safc cause i dont know to mess around with it.The injectors are brand new. I will try your suggestion on testing the injectors tomorrow.Thanks

[TheOne]

does it idle rough? if so it could be maf wiring.

[NateDogg]

Does the a/c fan turn on while you have the key to 'ON'. If so, your car may be in 'safe mode'.

Try pulling error codes from the ECU.

Also, makesure the Z32 MAF is at least 12" away from the compressor blades.

[lsxavier]

The maf is good.It idles fine.Natedogg:It's not on safe mode and no codes on ecu.I change the plugs again today and same thing it turns blackbut my a/f is around 17.1-17.6the injectors are good, no leaks
Modified by lsxavier at 8:34 PM 6/26/2007

[Florida240sx]

What kind of wideband do you have?What is the vacuum on your boost gauge?You already pressure checked your system?How do you have the grounds wired for the mafs?Their is a chance one of the tuning chips inside the ecu has come out. During shippign you know they love to play football with packages... one of the chips may be loose and not making full contact.Also when you rmeoved the safc you taped up all the wires correct? What abotu the A/F wires where you should be able to plug it back together to itself. Check that connection.

[lsxavier]

What kind of wideband do you have?What is the vacuum on your boost gauge?You already pressure checked your system?How do you have the grounds wired for the mafs?Their is a chance one of the tuning chips inside the ecu has come out. During shippign you know they love to play football with packages... one of the chips may be loose and not making full contact.Also when you rmeoved the safc you taped up all the wires correct? What abotu the A/F wires where you should be able to plug it back together to itself. Check that connection.

I have the AEM Eugo wideband.The vacuum on my car is around 18. I don't have vacuum leaks. On the maf, one ground to the chassis and one goes to the harness. When i removed the safc, i soldered all of the wires back and put the heat shrink wrap. As for the ecu, i haven't check the inside.

[scheffler]

nother supid ? the maf is faceing the right direction? I guess that it is but hey. Do you have a fuel pressure regulator if you do what is you fuel press?my vacune runs at like 23-25inhg ohter than that check all your wireing Bur it sounds like you are running to rich i had the same problem and i had to pull out some fuel. Happy trouble shooting and let us know.

[S13FX]

Whoa broski I just noticed something.

You said before hand you had the car with,

Stock Maf, 370cc Injectors and tuned with then SAFC. Correct?

Then you put in the Z32 Maf, 550cc Injectors, and Enthlapy ECU. Right.

After you did that did you zero out the SAFC from the tune you had on there for the 370cc injectors and stock maf?

[coolbone28]

^ He took out the SAFC cause didn't know how to mess with it.