24V Guru's : Swap 24V using 12V crank + trigger // Camshaft Position Sensor problem

[DJSubZero]

Good Afternoon,

Well long story there, I will do it short, hopefully.

I rebuilt my 24V with a 12V crank + 12V trigger wheel ( because the 24V trigger wheel cannot fit into the 12V crank I think ) and the availability of the 24V here are rare.

After reconnect correctly the 24V harness in my mk2, the are few code that piss my off and my engine start and other time didn't.

I Check every connector in the fuse and in the engine to finally find that, if the camshaft position sensor ( on the side on the intake ) is connect, my engine fault the code of : P0340 camshaft position and I cannot restart the start till I clear the code.

After few test run, I should start with the CPS and unplugged after few second for avoid the « internal processor code ».

As you know, CPS is responsible for firing or not the injector and when the ECU dont have a idea what going on there. My car won't restart untill a wait a couple of minute, maybe hour.

For your information, Immo are defeat.

MAF is new
Both camshaft sensor are new
TB is new
Coil + spark plug are new
O2 is new
Timming is perfect

When I can start the car and make fews run, the idle is good, no lag or missfire. They pull hard and fast, no stall.

Because of my 12V Trigger Wheel + CPS make the car unfunctionnable, because the ECU cannot read the right information on the crank ?

So my questions is :

Can I Flash the ECU and force them to forget this code ?

So I should replaced the crank with 24V one + 24V trigger wheel

So I should go standalone ?

I would like to keep up my harness and the 12V crank, but I have no choice....

Thanks you

Bruno

[DavidG60]

You should take a look at this post:

12V crank in my 24v bottom throwing timing codes. Help please.

It looks like you'll have to change your 12V crank trigger wheel for the 24V one.

[need_a_VR6]

I have run both a 12v and a 3.2L 24v with a 12v sensor and the stock crank/triggers and had to make no changes to get it to work. Trigger angle was the same, etc.

By CPS in your post do you mean cam sensor or crank sensor?

Which ECM are you using a 12v one or a 24v one?

Standalone makes problems like this easy to fix, but can be more work in other ways.

[DJSubZero]

I mean cam sensor ( the one on the right side of the intake manifold )

Using 24V ECM

12V Crank

12V Trigger

24V Block

24V harness

I will check my timing for sure its not offset a bit,

Tks

[need_a_VR6]

Make sure you dont have the intake and exhaust cam plugs swapped.

[DJSubZero]

Tks for your help

I found something in the fusebox that been disconnected

Now, start nicely and pull hard