Hi Guys

Will these Injectors fit my 1995 XJS 4.0L AJ16 Engine?

These injectors are for a BMW M3 and Z3 (1996-2000) + BMW 328IS + 3281 2.8L & 3.2L

Although I haven't seen them yet, I've been told they look the same but just want to check

Manufacturers Part Number: 0280150440

Interchange Part Number: 852-12157

Does anyone know if these will fit my 1995 XJS 4.0L AJ16 Engine?

 

Alex,

My latest Bosch EFI catalogue does NOT list Injectors for the AJ16 engine. I seem to remember they are Nippon Injectors, but stand corrected on that one.

They do so for the AJ6 and that is 0.280 150 165, and maybe they will fit, as the Inlet manifold is "basically" the same, BUT, the flow rate, and drive amperage may well be all up shiit creek for the AJ16 management system to cope with, and the ya got problems than you started with.

 

No they will not. What happend to the set from eBay a few weeks ago!?

 

I would think that the X300 injectors would be a fit??? There are probably many sedans in salvage yards that you could find injectors from them??

bob

 

Just because something looks identical doesn't mean it has the the same flowrate. The XJ6/XJR injectors are different for example, I have seen numerous examples of the same engine family having up to 6 different injectors, depending on the state of tune - all mechanically interchangeable.

How do you know you need injectors?

 

3.2/4.0 XJ6 injectors are LHE1520AA
4.0 XJS injectors are DBC10423

So it appears not interchangeable.

 

Hi Grant

Yup, flow rate could be different as you say

Such a shame as the Guy who's got them owes me a favour, although I am already working on Plan 'B'

 

Hi Daim

No idea who bought those, as its new ones that I'm after

 

Hi Jagboi

Warrjon showed me how to Test them and 4 of the 6 have had their Coils burnt out, as there was no resistance between the Pins

You can see how I did the Test on Page: 95 of my 'Cherry Blossom' restoration thread, with Pics of me Testing each one and here is the Link to that page: Testing the Injectors of my 4.0L XJS with AJ16 Engine

 

There are 2 things you need to check

Injector resistance and flow rate.

Flow rate is specified at a specific psi usually 43psi. If the flow rate on a replacement injector is lower than original you can increase the pressure to increase the flow rate.

Resistance - there are low and high resistance (R) injectors. If you put a low resistance injector in place of a high you will burn out the injector driver in the ECU. On the other side if you put a high resistance injector in place of a low resistance the injector will not open quick enough.

To put low R injector in place of a high you can add a series current limiting resistor for each injector so if the original injector has a R of 13ohms and the new injector 3ohms you add a 10ohm resistor in series and it WILL work.

Do not go part numbers as the part number change may be a change to the pintle or even an equivalent injector from a different manufacturer. Measure the R of one of your good injectors. The Bosch injector Grant posted 0 280 150 165 is listed as 22lb @ 43psi and low R. They were also used by Ford in the 3.2 and 3.9 V6. If your injectors are around 1-3ohms these should work. There are also a number of other Bosch injectors listed for the 4.0L Jaguar I6 from 18lb to 22lb, I would expect the ECU would be able to trim the fuel in closed loop mode.

The only other way is to test one of the good injectors on a test rig to see what lb @ 43psi it pumps.

X300 has high R injectors so will not work without a change to your ECU

 

This is for his AJ16 engine, not V12, shouldn't the injectors be very similar to the X300? The engine is basically the same as the X300 application.

 

 

PLAN B.

Put a V12 in the damn thing and make a REAL car out of it, problem solved.

If you are not comfortable, ship it to Greg, he appears bored at the moment, HAHA.

 

If that is the case then the Lucas part number on the Injector should be D3156KA (or 3155) and these are 16ohms

 

I realise this is for the I6. I don't know the AJ16, I do know when some manufacturers changed from low to high R injectors high R was added to the same engine with subsequent changes to the ECU injector drive circuit to increase the current to the injectors.

Alex measure the resistance of one of the good injectors, if it is 16R then X300 will drop straight in.

stumbled across this
https://www.jaguarforums.com/forum/x...3165aa-126702/

 

'Nicer problems to have' (Lol)

But on the Injector Front: GF has some good contacts and what she has come up with so far are the following

3 X Brand New OEM Injectors DBC 10423 for an XJS 4.0L

3 X Brand New OEM Injectors EBC 4430 for an XJ6

Do you think I could use these Six on my XJS 4.0L AJ16 ?

 

How do you increase the pressure to increase the Flow Rate? would you have to change the FPR?

 

Alex,

Since your such a nice guy, I found the following.

XJS, FROM Vin 194775 (AKA 4ltr AJ16)
Injector Part # is DBC10423, which s/ceedes to LHE1520AA.

X300 4ltr (AKA AJ16)
Injector Part # is LHE1520AA.

SIMPLE my man.

Make sure her commission is worth the effort.

 

In OB's older thread regarding which injectors would fit, I actually looked them up. All AJ16 (apart for AJ16SC) injectors are the same. So be it 3.2l or 4.0l no problem just swapping them around...

 

Hi Daim

Cheers! Thanks for that useful info