Well i got my car done. Ive got a Power FC, front mount, nismo fpr, t04B turbo, 555 destchwerks injectors. Im also running a blow through system on my Z32 MAF And yes Ive set the MAF to VG on the Power FC.
Thats just the basics of the setup but its all needed to help me.
Heres the problem we tried using a SAFC to lean the injectors out but it was no good so I turned the SAFC off and plugged in the POwer FC. I turned the Power FC down to 67% which is the recommended procentage by some of the tuning sites Ive seen. But the car is still running really rich and idles like a drag car. We got the idle to smooth out some by dropping the injector duty down to 25% but this was too lean for the motor to rev any. Also we realized the Z32 MAF is reading 3 volts while the car is off...
Anyone have any advice or things I can do to fix this?
Modified by Blown240sx at 6:14 PM 6/14/2006
POwer FC with 555cc injectors
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Blown240sx
- Posts: 1963
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- Car: 1996 240sx
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highmilehatch
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- Joined: Wed Mar 17, 2004 7:16 am
Re: POwer FC with 555cc injectors (Blown240sx)
You really need to remove the AFC. You don't need it. Power FC is a full standalone. AFC is a piggyback. For injectors it's (370/555cc)x100, so 67% is correct. Did you change the injector lag time? You have to or it will run how your describing. Lag time should say 0.00ms right now. Thats assuming a stock lag time which is 0.56 or 0.58 (I've also found some sites claiming stock 370's lag are 0.64., but I've had no problems working with 0.58.) So, lag time is (new inj. lag - stock inj. lag). Your 555cc injectors are 0.71ms. You want to change the 0.00ms to say +0.13ms. Do this, turn the car on and let it idle for a few minutes with no accessories on. Power FC goes through learning procedure.
None of this may work for you because of how you have your MAF setup. There really is no benefit to run a blow through. Z32 can support plenty of power and if you know how to set your idle speed and ignition timing perfectly, you won't have issues with open atmosphere BOV stalling. I would suggest reverting back to the stock location.
None of this may work for you because of how you have your MAF setup. There really is no benefit to run a blow through. Z32 can support plenty of power and if you know how to set your idle speed and ignition timing perfectly, you won't have issues with open atmosphere BOV stalling. I would suggest reverting back to the stock location.
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highmilehatch
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- Joined: Wed Mar 17, 2004 7:16 am
Re: (Loveless)
You must not have done the learning procedure.
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Blown240sx
- Posts: 1963
- Joined: Thu Apr 21, 2005 3:20 pm
- Car: 1996 240sx
Re: POwer FC with 555cc injectors (highmilehatch)
We removed the SAFC after I couldnt get it idling. I think the problem is not the blow through design cause Ive seen plenty of setups work fine with it. I think the MAF is bad after thinking about it. The MAF is sending a 3 volt signal while the car is off and at idle so wouldnt this tell the computer to dump fuel for the load at 3 volts on the MAF Scale?highmilehatch wrote:You really need to remove the AFC. You don't need it. Power FC is a full standalone. AFC is a piggyback. For injectors it's (370/555cc)x100, so 67% is correct. Did you change the injector lag time? You have to or it will run how your describing. Lag time should say 0.00ms right now. Thats assuming a stock lag time which is 0.56 or 0.58 (I've also found some sites claiming stock 370's lag are 0.64., but I've had no problems working with 0.58.) So, lag time is (new inj. lag - stock inj. lag). Your 555cc injectors are 0.71ms. You want to change the 0.00ms to say +0.13ms. Do this, turn the car on and let it idle for a few minutes with no accessories on. Power FC goes through learning procedure.
None of this may work for you because of how you have your MAF setup. There really is no benefit to run a blow through. Z32 can support plenty of power and if you know how to set your idle speed and ignition timing perfectly, you won't have issues with open atmosphere BOV stalling. I would suggest reverting back to the stock location.
Re: POwer FC with 555cc injectors (Blown240sx)
did you set the maf type in power fc?
Re: POwer FC with 555cc injectors (Loveless)
i think that was one of the first things he said
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Blown240sx
- Posts: 1963
- Joined: Thu Apr 21, 2005 3:20 pm
- Car: 1996 240sx
Re: POwer FC with 555cc injectors (nzmoman)
Well we figure out the problem which I should have looked for earlier. Te MAF wiring was fine and the MAF it self was fine but for some odd reason the MAF plug that connects to the MAF itself was some how leaking voltage from the Power side over to the Signal side. We took the plug apart and I put all new connections it. Plugged it in tested it with the Power FC and Voltmeter and PERFECT!
Changed the spark plugs out (old ones fouled cause of all the fuel) and messed with my injector duty and latency. Found my Injector duty to be %72 and Latency was .32msecs. I dont know why the latency was so high but it works fine. Now just get the exhuast on and start tuning to take some fuel out of the upper rpms cause its getting super rich up top.
Changed the spark plugs out (old ones fouled cause of all the fuel) and messed with my injector duty and latency. Found my Injector duty to be %72 and Latency was .32msecs. I dont know why the latency was so high but it works fine. Now just get the exhuast on and start tuning to take some fuel out of the upper rpms cause its getting super rich up top.