Blobber Posted March 28, 2009 Share Posted March 28, 2009 With hybridz advise I started to install Z31 ecu with OEM harness to my 260z(don't have L28ET harness). I'm almost on top this but few things I need to ask. Which of these components do I need to connect to make ecu work and where do I connect these? - power transistor - Air regulator - EGR control solenoid valve - PR control solenoid valve - Cylinder head temperature sensor - Fuel temp sensor - Detonation sensor - EFI relay - EIA solenoid - Idle up solenoid valve Sorry If these little beginner questions, but I'm doing this for the first time. Quote Link to comment Share on other sites More sharing options...
Bernardd Posted March 28, 2009 Share Posted March 28, 2009 With hybridz advise I started to install Z31 ecu with OEM harness to my 260z(don't have L28ET harness). I'm almost on top this but few things I need to ask. Which of these components do I need to connect to make ecu work and where do I connect these?- power transistor - Air regulator - EGR control solenoid valve - PR control solenoid valve - Cylinder head temperature sensor - Fuel temp sensor - Detonation sensor - EFI relay - EIA solenoid - Idle up solenoid valve Sorry If these little beginner questions, but I'm doing this for the first time. You need the power transistor, efi relay and the cyl head temp sensor. The power transistor grounds the coil through it's case so make sure it's well grounded. The other components are straight wiring as per wiring diagram. Quote Link to comment Share on other sites More sharing options...
B00STDZ Posted March 28, 2009 Share Posted March 28, 2009 Can you use a 280zxt harness with a m30 ecu? Quote Link to comment Share on other sites More sharing options...
GrayZee Posted March 28, 2009 Share Posted March 28, 2009 The cyl head temp or (CHTS) has two wires, one goes to the ecu, the other ties in with a wire from the AFM and then also goes to the ecu. The efi relay turns on the main power for the CAS and the AFM as well as runs a signal back to the ecu. Which is funny because the efi relay gets a signal from the ecu to energize. It is like the ecu has two wake up modes... partially awake, and fully awake. Quote Link to comment Share on other sites More sharing options...
GrayZee Posted March 28, 2009 Share Posted March 28, 2009 Can you use a 280zxt harness with a m30 ecu? Yes, but you have to make a few mods to the harness. Like the maf sensor plug and ecu plug have to be changed. There are also some changes needed in the fuel pump circuit. Of course you need a Vg30 type CAS wheel. I have a M30 ecu that has already had a eprom socket installed if you are interested. Quote Link to comment Share on other sites More sharing options...
B00STDZ Posted March 28, 2009 Share Posted March 28, 2009 Yes, but you have to make a few mods to the harness. Like the maf sensor plug and ecu plug have to be changed. There are also some changes needed in the fuel pump circuit. Of course you need a Vg30 type CAS wheel. I have a M30 ecu that has already had a eprom socket installed if you are interested. So with your ecu it has already been swapped to work with a 280zxt harness? So now I need a 300zxt CAS and MAF? Is there a difference in chopper wheel types throughout the years? Could I use a z31 CAS, M30 ecu, z32 MAF all on a 280zxt harness? Quote Link to comment Share on other sites More sharing options...
RUZN Posted April 15, 2009 Share Posted April 15, 2009 I just did the Mod with good success. Even got a Direct fit O2 sensor so no need to change the 280zxt Downpipe. If you look through my album or ask me I could send you all the Wiring Diags with Colour routing ont he wiring diag. So let me know. Was a good challenge but not to hard just lots of time =-) But DIZZY's are the same I got mine out of a NA VG30 from a Maxima as well as the MAF from a NA 300zx (came with 6pins already) Quote Link to comment Share on other sites More sharing options...
Blobber Posted July 14, 2009 Author Share Posted July 14, 2009 You need the power transistor, efi relay and the cyl head temp sensor. The power transistor grounds the coil through it's case so make sure it's well grounded. The other components are straight wiring as per wiring diagram. Do you I really need the power transistor if I use the coil which I was using with my L26 and not z31 coil? Quote Link to comment Share on other sites More sharing options...
jeffp Posted July 16, 2009 Share Posted July 16, 2009 I have a complete setup if you aare interested. wire harness, coil, CAS and distrributor, ECU , MAF if you are interested. Bernard and I, between the two of us, have installed every Nissan ECU. Currently both of us are running a Z32 ECU, and in my opinion this is the best of all the systems Nissan has done for the cars. You can get power form all of them Z31, M30 but both of these systems use a single coil and distributors. The Z32 system is fully sequential and will give you the best results for your time and effort. But as I said I have a complete system if you are interested. Quote Link to comment Share on other sites More sharing options...
Blobber Posted July 16, 2009 Author Share Posted July 16, 2009 Well, I have z31 CAS, MAF, ECU, harness, distributor already. At the time only problem is how to connect coil and fuel pump to z31 harness. After that I only need to connect the whole thing to the car. Quote Link to comment Share on other sites More sharing options...
Blobber Posted July 19, 2009 Author Share Posted July 19, 2009 I'm still trying to figure out how the fuel pump(and all the other wiring) is connected in z31. Can someone explain me what that dashed line means? Quote Link to comment Share on other sites More sharing options...
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