Vtec e / Dual Vtec

[Tkhonda7]

Ok Tony you pushed me out congrats.

[cbaber]

What's the exact code? After clearing it start the car. The CEL should not stay on. The CEL will come on for a couple seconds when you key it on. Which wire harness did you use? What ECU are you using? The CX did not have lean burn, so that ECU won't help you. Also, the EGR connections are different between the HX, VX, and JDM 3 stage.

[Superfuelgero]

On the front of the engine by the bellhousing is an engine code. Get that, and you'll be able to get more info.

[greasemonkee]

There are at least 5 or 6 variants of the D15B which is what he has, I was about to buy one of those engines from Hmotors and those guys told me they originally had a one wire O2, I didn't believe him and he said he was looking right at it, at several of them in fact. Might be worth checking into. Definitely a neat engine, but the only way to get the leanburn may be to use the P07 and run a piggyback fuel controller.


If I had access to a Helms manual for that original car/engine I would have owned one of these engines long ago - along with a shelf full of spare, peculiar, jdm specific gaskets for it.

[Superfuelgero]

Thats good to know. Wonder if he's trying to run a P08 then. A P07 will get him the LB, but it won't know what to do about the extra stage. Guess he could get a controller for that too. If it wasn't for the added valve train weight, I'd look into one also. Still thinking about a d12....

[tony_2018]

Why are you running the dual stage vtec with a honda cx ecu? You need the original p2j ecu.

Edit: You post what engine you bought but you didn't post what car it went into. Also what is the part # on the jdm ecu.

[cbaber]

The JDM engines didn't come stamped differently between the variations. For example a block stamped D15B could be the 3-stage vtec or regular vtec. The way to tell is to look at the vtec solenoids. The 3-stage vtec should have 2 solenoids compared to 1 for the regular vtec and none for non-vtec. The JDM 3-stage vtec came with a 1-wire o2 sensor.

Assuming you have the right engine, and you told us you have the right ECU, I need to ask which wire harness you are using.

BTW, the CX did not have a lean burn engine (VX and HX did), so running that ECU is not going to help vs the P2J-003. To check codes, jump the service connector by the ECU with a paper clip and look up the engine trouble codes.

If it stays lit without blinking, no codes are stored. If the CEL stays on all the time (without service connector jumped) then I would try a different ECU. The one they sent could be bad.

[tony_2018]

JDM cel codes are not the same as usdm so you better double check that.

[tony_2018]

So wait.....how do you know the cel is for an o2 sensor if you didn't check?

[cbaber]

Originally Posted by tony_2018

JDM cel codes are not the same as usdm so you better double check that.

Originally Posted by tony_2018

So wait.....how do you know the cel is for an o2 sensor if you didn't check?

He can still use the service connector jump to retrieve the trouble codes from the JDM ecu. But you are correct an OBD2 scanner tool will not read anything or clear any codes if you hook it up to the JDM ECU as they do not use the same OBD2 protocol.