Since July I have gone through 4 IACVs, every time it has thrown a code for the iacv... I'm at a loss. My car is stock except jdm d15b. I just put in another new IACV 2 weeks ago. Tonight my car started to feel like it was going die while at idle, No code, no surging. Anyone know what could cause my car to kill FOUR IACVs. Lastly, I came here for help not to be treated like an idiot. So if you have nothing positive to say then shove off.

 

Would you happen to have a IG? It would just make it easier, for the both of us. We could possibly continue the conversation on there. Help me, help you. Once you give me this, I can further assist you.

 

Why are you replacing the iacv in the first place? The check engine for it could be a wiring issue. Post your year make model ECU etc.

 

And why would she (assuming she due to username ) need an Instagram account for you to help her?

 

So blatantly thirsty

https://honda-tech.com/honda-civic-d...sting-3002401/

 

IACV are not cheap, at least for my 95 b18c1, autozone wanted 250ish. Some good DIY's on cleaning these and FITV's. IACV I've just reinstalled with head gasket switch has me nervous, for how horrible it looked on the inside. Thoroughly cleaned and regasket'd fingers crossed no more hunting idle

 

Thanks HPH. It's 96 civic ex manual p2p.

 

Wrong ecu. Need p2j manual ecu.

 

Okay. I don't get a coffee for ecu. If I switch the ecu can I use the 3 stage vtec? I been using the one from my y8.

 

Auto correct code not coffee

 

She didn't post what model civic she has. So I figured I could obtain this thru possibly a DM, and follow on IG. Convenient was the idea.

 

Not even all of king Midas' water could quench your thirstiness.

Edit: And that **** has ALOT of water

You wouldn't get a code for the wrong ecu. The ecu can't jump to conclusions like humans can. All the ecu knows is that it is in charge of keeping an engine running. It cannot differentiate between engines.

Swap in the correct ecu and report back.

 

P2j is dual stage vtec, p2p is single.

 

Not necessarily.

Does your head have 3 stage VTEC? The ECU isn't the only part of the equation here.






The ECU she's using might BE the right ECU. She hasn't told us which D15B she has. How about we all stop jumping to conclusions and get full information before telling her to buy things?

 

Shes using the wrong ecu. Shes using an ex ecu on her jdm d15b.

 

It's the 3 stg vtec. I'm running the vtec solenoid from my y8. I didn't know I could use the 3 stage with obd2 car, so I took it off, I still have it. I'm using my stock ecu, obd2. My receipt for the motor says d15b d 1493cc vtec 3-st.

I kept everything the same except the d15b motor, timing belt, and alternator belt. The place I got the motor from told me to keep everything as is except those things.

This swap was done over a year ago, it ran with no problems until 6months later.

 

Since the P2J-003 is next to impossible to get, can I use a chipped ecu?

 

There is no chipped ECU for the 3 stage I know of. You can contact someone like xenocron or the like and see if they do. The issue is the two stages of VTEC and how to activate them separately when most VTEC ECU's only have one circuit for that.

 

There is a chipped ecu solution, it requires a custom basemap and the gsr iab circuit. Gotta find that D-series post....but its there.

 

Will this solution support 3stg vtec?

 

Not having the correct ECU is not the issue here. You've either got an open or short in the harness or the ECU is bad. Test the wiring from the IACV connector to the ECU (blue wire) and from the IACV connector to the dead plug on the driver's side rear corner of the engine bay (yellow/black wire) Check for continuity from end to end (there should be), continuity between the two wires (there should be none), and continuity between either wire and ground (there should be none)

If everything checks out, wiggle the harness while watching the multimeter and see if anything changes. Also check the IACV for corrosion. If all that checks out I'd try another P2P ECU.

 

How are you checking for codes?

A short or open in the IACV circuit would throw an IACV code.

If no code is really thrown, then you may just need to adjust the idle speed.

And as you probably already know, the P2P ECU is a bad match for the 3-stage VTEC engine.

 

94eg8 is correct, the issue isn't your ecu. You probably didn't set the idle, or the ecu hasn't learn it properly.

 

Does anyone know if I can chip a p06 to accommodate 3-st vtec?

 

If you use an automatic ECU, possibly. I know with old OBD0 ECUs you could tune with Turbo Edit and use the part of the ECU responsible for controlling the automatic transmission lockup solenoids to control the vtec solenoid instead. I'm not sure if you can do something like this with crome/ECTune/Hondata/Etc or not.