CapnKrunch

Hey, I just swapped in my d16z6 in my 1992 vx without swapping the ecu for a p28. I've heard that it will run like **** and throw a CEL. But it runs awesome and it hasn't thrown a CEL. I kept the VX harness without modification, used the 5 wire (z1) 02 sensor in the z6 and worked out fine. The only thing I needed was the drivers side motor mount. Hows this setup sound?

dohcdelsol

im pretty sure the reason why the cel would come on is from the o2 sensor which you already have fixed.

i dont think the vx ecu will let you redline at 7200 where the z6 normally does.

CapnKrunch

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dohcdelsol &raquo;</TD></TR><TR><TD CLASS="quote">im pretty sure the reason why the cel would come on is from the o2 sensor which you already have fixed.

i dont think the vx ecu will let you redline at 7200 where the z6 normally does. </TD></TR></TABLE>

yeah the only drawback is that the redline is a lot lower, so ill still be making power when i hit redline.

wrxya33

does your vtec work i wouldnt think it would

ventturei27

u should really install a p28. is your car an auto or manual (i think i have an extra a/t laying around)

but once u switch out ecus you will notice a huge difference in vtec kicover and overall power, im surprised that its not throwing a cel, but mainly the difference is going to be the vtec cel that usually comes on in these situations

CapnKrunch

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ventturei27 &raquo;</TD></TR><TR><TD CLASS="quote">u should really install a p28. is your car an auto or manual (i think i have an extra a/t laying around)

but once u switch out ecus you will notice a huge difference in vtec kicover and overall power, im surprised that its not throwing a cel, but mainly the difference is going to be the vtec cel that usually comes on in these situations</TD></TR></TABLE>

Yeah I actually got a CEL driving to school after about a 7-10 mile drive and then one coming back it was only on very breifly. It goes away after a couple minutes or also when I turn my car off, then turn it back on, its gone. I've only got the CEL twice. My car is a manual.

How hard would it be to swap my z1 harness and everything thats on my z6 engine onto the p28 ecu? Would it just plug in?

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by wrxya33 &raquo;</TD></TR><TR><TD CLASS="quote">does your vtec work i wouldnt think it would</TD></TR></TABLE>

And, yes my VTEC does work. The VX harness is already wired for VTEC

suspendedHatch

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CapnKrunch &raquo;</TD></TR><TR><TD CLASS="quote">And, yes my VTEC does work. The VX harness is already wired for VTEC </TD></TR></TABLE>

No, ********. VTEC-E comes on around 3000 RPM. VTEC comes on around 5000 RPM. If your VTEC kicks in at 3000, your motor will bog down. Some people don't know the difference but I challenge you to look at a dyno graph of anyone who has adjusted their VTEC crossover point. And again at 5000 RPM WOT, the power is going to drop off like **** from a horse's ***.

The Z1 and Z6 heads have COMPLETELY different flow characteristics. Swapping ECUs either way is a bad idea.

CapnKrunch

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by suspendedHatch &raquo;</TD></TR><TR><TD CLASS="quote">

No, ********. VTEC-E comes on around 3000 RPM. VTEC comes on around 5000 RPM. If your VTEC kicks in at 3000, your motor will bog down. Some people don't know the difference but I challenge you to look at a dyno graph of anyone who has adjusted their VTEC crossover point. And again at 5000 RPM WOT, the power is going to drop off like **** from a horse's ***.

The Z1 and Z6 heads have COMPLETELY different flow characteristics. Swapping ECUs either way is a bad idea.</TD></TR></TABLE>

But VTEC the lift or shutoff valve solenoid or whatever its called (to make it VTEC-E) is disconnected.

So I knew that the swap was going to run a little rich, but would keeping my VX ECU on the Z6 be bad for the z6?? The ECU adjusted/callibrated itself to the motor when I first started it up, so it is somewhat in-tune with the motor.

You are saying that my Z6's VTEC crossover is at 2500 (because the VTEC-E crossover is at 2,500 rpm on the z1)?

ventturei27

the vtec kick over tim is actuall at 5200 and goes all the way to 7500

the vx ecu will make that car run really rough comapred to a si ecu with the si motor. vtec-e is in no way vtec is some special stepchild in comparison

the cel light is telling you that there is an issue it may go away. but thats just the light. the vx ecu wont get used to the si motor.

ive done swap a few times, just get the p28 and ull notice a difference in the actually performance of the car and the motor will last longer becasue it will be getting the right air/fuel mixtures and engine running schemes

JShull

We ran the VX ecu with my swap for a bit. I did alright but started running like **** one day. We swapped it out for the P08 we had and the difference was like night and day.

Get the right ecu.

CapnKrunch

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ventturei27 &raquo;</TD></TR><TR><TD CLASS="quote">the vtec kick over tim is actuall at 5200 and goes all the way to 7500

the vx ecu will make that car run really rough comapred to a si ecu with the si motor. vtec-e is in no way vtec is some special stepchild in comparison

the cel light is telling you that there is an issue it may go away. but thats just the light. the vx ecu wont get used to the si motor.

ive done swap a few times, just get the p28 and ull notice a difference in the actually performance of the car and the motor will last longer becasue it will be getting the right air/fuel mixtures and engine running schemes</TD></TR></TABLE>

Is the VTEC crossover still 5200 with the vx ecu?? or is it 2500 since thats what it was with the z1's VTEC-E. It runs fine for me right now, but I will look into getting a p28 real soon. Should the ECU (p28) basically just be plug and play with the VX harness(only problem being the 5 wire o2)?