JX to AAZ

I will start with an apology as I am probably asking questions that have been answered many times before.

I am working through Mr. Baxter's very helpful information but have a couple of questions.

1. The 96 AAZ Turbo has 3 mounting points to the exhaust manifold, the JX Turbo has 4. I intend to use the JX Turbo, is there any problems with this?

2. The water pump on the AAZ engine is dead, can I use the one from the JX.

3. The AAZ injection pump has 3 sets of wires from it, the JX had one. I believe one set to be an imobilizer that requires removing? Any ideas?

4. I am going to use the inlet manifold from the JX. I have welded extra material, skimmed it & machined the ports. Seems quiet a nice solution. I can send photo's if anyone is interested.

Also if anyone is having problems with bespoke mechanical cables, drop me a line.

Many thanks.

3. if you remove the black plastic cover from the stop solinode you will find the one wire you need to connect like the JX.

The wire coming from inbetween the pump and cylinder head is the electrical version of your cold start handle - I have connected this to a ignition switched and fused +12v

Ignor the other wires (can not remeber where they are now)

4. I have tig welded my JX manifold and port matched this with the AAX inlet manifold gasket - I have no issues with it yet, you just need to make sure you have enough material for the gasket to seal against.  You will also have to trim your rear air cleaner bracket as it will rub against the turbo to inlet manifold pipe.

Pics would be good to comfirm all of the above

 

John

Right then

On your photo of the electrics

I have ignored B and C.  I have removed the black cover from A, which will reveal the single wire to connect to the JX fule pump wire.

 

(I would also change all of the sesors oer to the JX versions)

 

On you picture with the inlet manifold, I would match the inlet manifol to the AAX gasket then fit and forget (Nice job by the way)

 

John

Edited by jc_geddes

Mazz,

 

do you have a wiring diagramme for the setup you have run?

Did it make any noticable differenc to noise , cold or hot start?

 

Cheers

JOhn

C is the advance solenoid, this solenoid valve varies the amount of pressure that acts on the advance piston.

B is a sensor, bit like a needle lift sensor on a TDI engine. It tells the ECU (Yes, it does have one) when injection has commenced, then varies the amount of pump pressure to the advance piston as mentioned above.

You can put it in, and it will work, but it won't be right.

I have just come accross this type of pump myself, and after a bit of advice I have decided not to use it, and I am going to fit a different AAZ pump, or maybe a JX pump, not decided yet.

general consensus is that the engine will run too much advance, and will be noisey.

If you have the car that this engine came from i would be tempted to fit the whole lot, meanin use the AAZ glow control unit as that also has the timing control in it.

Hope that is of some use.

Thing is, your advance of injection is now inoperative.

The faster the engine goes the earlier you need to inject the fuel.

because that solenoid is not connected this is not happening.

as far as I know, disconnected it fails into full advance.

it may work, but from what I can gather it won't as well as it could.

Okay

 

assuming I can not get hold of the bits to do it properly

What is the best solution?

Different AAZ pump

or

JX pump?

 

I was under the impression that the JX pump would not be good enough - but it would appear that there are several people running them - do they need an mods??

 

Cheers

John

we have used that pump but made our own advance loom ,we just used a micrswitch on throttle lever and a relay to operate advance worked fine,and still does work fine van felt very flat untill we done this but your pump looks different to ours again ,id just fit glow plug relay and aaz loom instead of swapping pump,its a lot easier,where you from,if you give me loom ill quickly modify it for you, no big job

Morning Mazz

Sorry I haven't got back sooner.

 

Where are you finding out about this stuff?  I have had a look and can not find anything on the internet.

The wiring loom for the engine I have  (sort of) I cut the connector off when I was dismateling the engine.

The connector has 14 wire going throuht it (if that helps)  I will later on have a look and tell you which pins the wires for the items we are looking at  are from.

Its very knid of you to offer to sort the harness out.  I would like to have a go my self first - I just need a wiring diagram to work from.

Did haynes do a gold diesel manual with the relavent wiring in?

Cheers

John

Mazz  Am I going mad I can't seem to find the link you were refering to.