MengeL

Just bought a 96 HX civic and when I stop its idles kinda high round 1500 rpm and when I hit the gas it like has a slight lag before it takes off and goes. It doesn't have a IACV either. It has an AUTO trans in it right now. I plan on swapping to a 5-speed soon but just wondered why it does this. Any opinions on why would be appreciated.

Former User

Engine information is required. Bone stock D16Y5 with CVT?

Why do you think the engine lacks an IACV?

tony_2018

How the hell does it not have an iacv...

MengeL

D16Y5 BLOCK WITH A Z6 HEAD. I AS TOLD AND READ THAT AFTER 96 THEY DONT HAVE AN IACV.JUDGING BY YOU GUYS COMMENTS THATS INCORRECT.

YES IT HAS CVT AS WELL

Ohmega

iTrader: (1)

Do you mean FITV?

Former User

Yes, your information is incorrect. 96-00 Civics have an IACV but lack an FITV.

What ECU is your engine running on?

NotARaCist

iTrader: (1)

Turn caps lock off. Why are you using a Z6 head on the Y5 block? To reiterate what RonJ asked, what ECU are you using?

MengeL

Im not using the Z6 head by choice. It was already mated to the block when I bought the car and as far as ECU its running on P28. Some kid tried to "build" a car and I guess im dealing with all the repercussions of this.

Ok thanks, now that the IACV problem is cleared up, my buddy told me to just take it off and clean it and it may have a positive effect on how the car is running. Now to just do it.

Former User

The CVT will never run correctly on the P28.

Post the CEL codes.

MengeL

[QUOTE=RonJ;50766687]The CVT will never run correctly on the P28.

Its running on a P2M ECU after further investigation. Gah this is turning in to more of a headache than expected. I hate when ppl try to do **** to cars or tell you false information about them. Now I feel dumb.

The kid I bought the car from is some young kid who thought he knew everything there was to know about it and all Hondas. Obviously he knows nothing, thus why im here.

NotARaCist

iTrader: (1)

...A New Zealand ECU? The **** why? If you had a normal autotragic, I could tell you exactly what the problem is. With CVT, though, I don't know if there's a TCU involved. I would assume there is, but...is it integrated the same way the 4AT TCU is?

tony_2018

TCM is involved for the cvt and is needed. The dumbass who had this before didn't understand how everything works and just decided to add a z6 head in hopes that he would gain some sort of performance.

Later found out it drove like **** and decide to sale in hopes of recouping his loss.

MengeL

Ok well what do you guys recommend I do here in this shitty situation? Ultimately id like to put a 5-speed in but with all this im thinking a full motor and tranny swap is in order.

NotARaCist

iTrader: (1)

Do the 5 speed swap, and get a chipped ECU to run it. The other option would be to get the proper head, and get the proper ECU, both of which would be difficult to find, and cost prohibitive. There's nothing wrong with the block you have.

Former User

Slap on a D16Y5 head and sell the car as a stock HX, which is a popular fuel efficient car for enthusiasts. Use money to buy another Civic for your swap.

tony_2018

This.

Learn your lesson and be a more thorough shopper instead of picking up the next cheapest civic you can find.

NotARaCist

iTrader: (1)

He would need to get the head and the ECU, too. I feel like those two things would be difficult to find, and pricey when he did find them, for exactly the reason you're telling him to do it.

Former User

The P2M is an HX ECU.

Oops. You're right. The HX needs a P2N ECU.

NotARaCist

iTrader: (1)

Is it really?

https://www.hondata.com/tech-ecu-identification

According to Hondata, the P2N is the HX ECU. P2M is...what I can only assume a New Zealand equivalent of our EX.

tony_2018

I believe the HX had a recall on some issues with the ecu and was replaced with a newer model.

NotARaCist

iTrader: (1)

Screw it, Majestic will tell us. Hold that thought while I do some research.

[edit] Research over. 37820-P2N-A61 is the original ECU number for the CVT. Apparently, though, the HX has an external TCU, unlike other 96-00 Civics. The PN for the TCU is 28100-P2M-327. There is no mention of a superseded part number for the ECU (a post-recall part would be a superseding number, a pre-recall part would be a superseded number).

OP, that box that says P2M on it, what is the full string of letters and numbers on it? Is there another box behind the passenger kick panel with a different string of letter and numbers on it?

3glude

Check timing