Z32 Mafs
09-16-2006, 04:55 PM
#1
Z32 Mafs
I am in the midst of my supercharger install this evening and expect to finish by tomorrow. As some of you may know, about two weeks ago I changed out my fuel injectors for 370ccs and changed out the fuel pump for a walbro 255 lph.
The following happened last week. I got gas for the second time since I replaced the pump. After gassing up, I failed to prime the pump (I didnt forgotten the system had been de-pressurized by opening the gas cap to fill her up) and just cranked it. It failed a couple times, then fired up. This wasn't entirely unexpected. The problem is that within a period of 8 hours the same thing happened again, twice, even after I primed the pump- the car cranked and failed to start, or started then died from lack of fuel pressure. This hasn't happened since (it happened Wednesday) and as of that day, I got CELs for rich injectors in both banks (mind you, I'd driven for a couple weeks with the 370s and walbro in). I checked and cleared the CELs and they reappeared after about 30 miles of driving or so.
I replaced the spark plugs earlier today with NGK's gapped at 0.031- nothing out of the ordinary on the old NGK plats.
My questions:
1. If I am running a 2.87" pulley on my V1 and with my E-manage still not here yet, will installing the Z32 MAFS be better for me if I want to drive the car (not above 2500 rpm, of course, until I tune it and install the E-manage) until I get the car tuned, etc.? Or should I wait to install the MAFS until I have the e-manage installed? Can the stock A32 ECU make use of the Z32 MAFS signal without outside help?
2. Am I still going to be far too rich (or in danger of running lean) under the conditions given above?
The following happened last week. I got gas for the second time since I replaced the pump. After gassing up, I failed to prime the pump (I didnt forgotten the system had been de-pressurized by opening the gas cap to fill her up) and just cranked it. It failed a couple times, then fired up. This wasn't entirely unexpected. The problem is that within a period of 8 hours the same thing happened again, twice, even after I primed the pump- the car cranked and failed to start, or started then died from lack of fuel pressure. This hasn't happened since (it happened Wednesday) and as of that day, I got CELs for rich injectors in both banks (mind you, I'd driven for a couple weeks with the 370s and walbro in). I checked and cleared the CELs and they reappeared after about 30 miles of driving or so.
I replaced the spark plugs earlier today with NGK's gapped at 0.031- nothing out of the ordinary on the old NGK plats.
My questions:
1. If I am running a 2.87" pulley on my V1 and with my E-manage still not here yet, will installing the Z32 MAFS be better for me if I want to drive the car (not above 2500 rpm, of course, until I tune it and install the E-manage) until I get the car tuned, etc.? Or should I wait to install the MAFS until I have the e-manage installed? Can the stock A32 ECU make use of the Z32 MAFS signal without outside help?
2. Am I still going to be far too rich (or in danger of running lean) under the conditions given above?
09-16-2006, 11:56 PM
#2
I hooked up my emanage first and haven't done injectors or fuel upgrades yet, reason being I know there would be driving issues with no injector control, the emanage would scale down the injectors properly so I would have done it the other way around. I would wait on the emanage before doing anything else, so I'm not sure about the maf idea.
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