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spools420a · 07-19-2021, 02:04 PM

Thanks for all the help,YES it even feels like a boost leak.Tested by pressuring with air/smoke at 15 psi (my max boost ill be seeing) with open throttle and it hold the pressure.
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Z32 MAF wiring is

A - Nothng
B - signal
C - spliced into D
D - goes to ECU negitive
E - battery power
F - Nothing

C was originally had it own ground on the chassis ground but tried wiring it into D to see if it helped.nope

B gets around 1.5v at idle and as I rev it up it smoothly goes up in voltage,seeing a max voltage of around 3.5v at around 5-6k rpm

D was tested via voltage drop test and good ground.

E - is seeing battery power

I couldnt find what the signal voltage should read at the 5-6k rpm if anyone can confirm if the signal voltage at this rpm is good please let me know.

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The fuel pressure is not right though
FSM says
36psi with vacuum line connected
43psi with vaccum line diconnected

I checked the fuel pressure.
with vacuum like hooked up to the fpr it was seeing 43 psi fuel

just revving up the motor the fuel pressure jumpped to 50 psi

vaccume line removed we see around 52-56 psi of fuel

at 10 psi added to the fpr we were at 66 psi of fuel,being a 1:1 fpr i should see 53 psi and its not even consistant as it reads slightly different each time i add pressure

we def have a fuel pressure issue,It may or may not be the issue causing the issue but its somthing that needs solving.

Again thanks a bunch for all the help guys!

07-19-2021, 02:04 PM	#11
spools420a Zilvia Junkie Join Date: Dec 2009 Location: phoenix az Age: 42 Posts: 460 Trader Rating: (1)	Thanks for all the help,YES it even feels like a boost leak.Tested by pressuring with air/smoke at 15 psi (my max boost ill be seeing) with open throttle and it hold the pressure. --------------------------------------------------------- Z32 MAF wiring is A - Nothng B - signal C - spliced into D D - goes to ECU negitive E - battery power F - Nothing C was originally had it own ground on the chassis ground but tried wiring it into D to see if it helped.nope B gets around 1.5v at idle and as I rev it up it smoothly goes up in voltage,seeing a max voltage of around 3.5v at around 5-6k rpm D was tested via voltage drop test and good ground. E - is seeing battery power I couldnt find what the signal voltage should read at the 5-6k rpm if anyone can confirm if the signal voltage at this rpm is good please let me know. ------------------------------------------------------------------- The fuel pressure is not right though FSM says 36psi with vacuum line connected 43psi with vaccum line diconnected I checked the fuel pressure. with vacuum like hooked up to the fpr it was seeing 43 psi fuel just revving up the motor the fuel pressure jumpped to 50 psi vaccume line removed we see around 52-56 psi of fuel at 10 psi added to the fpr we were at 66 psi of fuel,being a 1:1 fpr i should see 53 psi and its not even consistant as it reads slightly different each time i add pressure we def have a fuel pressure issue,It may or may not be the issue causing the issue but its somthing that needs solving. Again thanks a bunch for all the help guys!