zigerog

Will update today 6/30/14

So lets start with the front of the block:


Ive been told that I have the wrong exhaust and the catylac converter is sitting in front of it when it should be sitting underneath.

o2 sensor:

is it wrong or is it suppose to be 5 wires?

Now for what I feel will fix the ecc 48 is a new wiring harness it leads from 5 wires to 7? and there is a loose plug that leads no where.



If any additional information is needed just let me know
It seems like im in need a o2 sensor or new exhaust and a need a p08 ecu or p28 still not a 100% sure.
I have a d15z1 intake im about 80% sure. Thinking about swapping in a d15b, or a b18 but I need a complete not trying to build it from the ground up. I found a d15b with everything except ecu. By everything I mean wiring harness intake exhaust ac power steering and tranny as well I have the d15z1 tranny which should be able to mount up no problems right?

zigerog

Im lead to beileve that my egr box is missing as well along with a couple other things ill post more pictures later I really appreciate the help you guys!

TomCat39

If it is indeed a D15Z1 engine that is the vtec-e (VX) economy engine. P06 is for the B7 motor not Z1 and is not vtec.

Not sure why they would throw a VX motor into an SI (D16Z6 performance motor).

You need everything from the VX to get the super economy going, no power though.

eghatch9295

iTrader: (1)

this is a somewhat tricky swap to make run correctly. i think people told you to go p06 because it wont look for the 5 wire o2, egr, vtec, etc. it is not the right fix. check out the forum at ecomodders.com they practically worship the d15z1.

zigerog

this was taken when i first got it and it was leaking like a siv yeah i know its a gas saver and not much power but would have I better odds getting rid of the check engine light switching to a d16z6 to pass smog?

Ill defiantly have to look into that a little more ive been on ecomodders a bit but the gas saver (vx) engine just seems like a big hassle expecially in the si but thats just my opinion. Do you guys as honda gurus think it would be easier to get it smog ready by just putting in a d16z6?

TomCat39

Yes, it's what the car originally had. Much easier to return to stock and no one will give it a second glance as long as your smog numbers are good. But that's my opinion.

deschlong

iTrader: (8)

1. Cat is the CORRECT one for the D15Z1. No problem here.

2. 5-wire O2 sensor is CORRECT for a non-California D15Z1 ECU. No problem here, provided you have the correct ECU.

3. 5-wire O2 plugs in to a 7-wire connector. I know it sounds weird but if you look inside the plug there is a funny loopback with a resistor between two wires. Here's a little discussion (one guy in there was a bit of a jerk, but I blinded him with facts).

4. Not sure about that unplugged connector. More info needed (wire colours, location, etc.)


"Easier" is a relative term. You've got the D15Z1 in there already, it's a great little motor, especially if you like gas sippers and fuel economy is high on your priority list instead of going slightly faster-ish with the D16Z6. A few problems to be ironed out and you'll be good to go.

eghatch9295

iTrader: (1)

I agree /\. Why swap a motor when wiring a few things in will have you going?

eHMxhACk

iTrader: (17)

What makes you think the car is an SI? Does your VIN number have EH3 in it?





eH.

zigerog

Hey guys I had made a post on the site a while back and I couldnt figure out the problem. I took it to honda trying to see if it may be easier taking that route since I cant seem to fix it. I have 3 check engine lights atm(14, 41, 48). They wanted almost 1000$ just for a o2 sensor and iac (Idle air control) and this was when I had just two codes.. After learning a little more I went to local auto store bought a new iac and they wanted about 350 for a new o2 sensor. Im in the car a bit already it seems like the more I put into the more wrong happens. After replacing the iac and cleaning up my o2 sensor a little bit the 48 code disappeared and then came back but with a 41 code aswell. I just want to clear up all my emissions bull and get back on the streets. I figured you guys are the smartest ones to talk to about my problem. I have a d16z6 sticker under the hood.. d15 actually in it.. looking for a little guidance if I should do a swap to a d16 or just swapin a integra engine.. thanks in advance

zigerog

I have a p28 ecu if that helps with anything.

78F350

If you have the D15Z1 (VX engine) in it you should be using the P07 ECU. The P28 is going to get the air/fuel mixture wrong and engage VTEC at the wrong RPM. It will also do better with a wideband (5-wire) O2 sensor along with the P07 unless it is the California emissions. There are some good threads already out there if you want to research that.

Some threads:
https://honda-tech.com/forums/honda-civic-del-sol-1992-2000-1/d15z1-o2-sensor-2783135/
https://honda-tech.com/forums/showth...3#post43799033

D16Z6 would be simple and a little more power. B18 or B20B isn't too hard to swap and would be a big upgrade from the D15.

There's probably plenty of buyers for the D15Z1 engine if you swap it.

zigerog

Well after you telling me that im defiantly considering a swap any ideas where I can get a complete b20?

78F350

I got my transmission locally and my B20B from ALN JDM Motors
They did a decent job. After I received it, I found that the dipstick and Map sensor were broken. They FEDEXed me both along with a harness to get a few connectors from (no extra charge).

H-Motors Online is a good, highly rated seller.

Lots of JDM engines on eBay too.
For a my swap I looked for a "Low intake" 96-98 JDM B20B.
There's other ways to go, but the 96-98, low intake, is fairly simple to swap into a 95 Civic.

Shipping can add quite a bit. Getting an engine with AC compressor/Alternator/PS is worth a few extra $$ rather than trying to add it later.

grumblemarc

iTrader: (4)

No one knows where you live and B20s are illegal in California,

zigerog

Thats disappointing to hear.. I do live in California. Any other suggestions man?

78F350

California considers the B20 an SUV engine.

Oklahoma I could put a Cummins diesel in, nobody would care.

B18 or just go back to the Z6.

I just did a quick CraigsList search in the San Diego area and came up with several B18s around $500-$650. Try your area, or hit up a junk yard for a 93-95 Integra.

zigerog

Ive searched around for a z6 but no luck. Well not cheap I bought it with the the swap and not smogged. It says I have a d16z6 with a d15y8 block. What would my chances being of having a successful swap with a jdm d15b??

zigerog

I plan on selling the engine after the swap, im not to concerned with speed or gas mileage a little extra power is always nice but what would be easier or does it not matter?

78F350

If you aren't going to put a Z6 in, the least expensive and simplest might just be to keep the D15Z1 and make it right. Putting in a JDM D15B with 3-stage VTEC and getting it to run right and pass smog doesn't seem to work for everyone and requires all the work of getting the Z1 right and A LOT MORE.

I bought my 93 Del Sol Si with a D15Z1 and p28 ECU throwing code 41 and a couple others. It has a D16Z6 intake manifold with no EGR.

To make it work well I got:

P07 ECU ($95-150 on eBay)
Wide band O2 sensor

I had to make a sub-harness to get the O2 sensor wired to the ECU:


It runs great with no CEL or other issues. I have kept it with the Z6 intake manifold and no EGR. I don't know how it would do on a smog check, but I expect it would be fine.

78F350

One last thought:
You said it's a VX engine in the title, but are you sure?
Figure out what you have before you do anything else.
The block, the head, the intake manifold, and the ECU all have codes which identify them. Find them, read them, look them up. It could be some sort of franken-motor-mini-me.

***Now with the threads merged I see you have a D15Z1 Block. You should still verify the ECU, Intake manifold, and Head. It looks like you have the right O2 sensor. Not sure how your harness is wired though. ***

Former User

A P28 ECU would not throw code 48.

zigerog

What makes you think you know my car better? Ive wanted a si since freshman year and I got my self one didnt want any other model. I know its a si and yes it very well does

TomCat39

We're only supposed to allow one thread per car issue and the two seem pretty close and related.

Threads merged to compliance. Editing title to include emissions.

78F350

That was cool. I was asking to merge or lock and it happened just before I posted.

Thx TomCat