Originally posted by spegru
I know there are a number of threads on this subject but so far Ive not been able to get my AJ30 running properly:
I'm using a MotorSport Electronics ME360 ECU
First Question - Trigger Offset: THE ECU needs to know what angle the crank shaft sensor is at and it seems that the AJ30's is not at TDC. Nor are there any markings on the front pulley.
Looks like it is 50 degrees btdc
spegru - 8/11/24 at 02:30 PM
Interesting.
I suppose this is MegaSquirt/Jolt? I also assume you are using the built in sensor, not an external sensor/wheel?
This Setting in the ME360 MEITE setup software is degrees after TDC so my 302 figure corresponds to 58deg BTDC, which is 8 degrees different to your
figure.
That may not matter - if it's all taken care of in the timing tables, which presumably could be 8 degrees different
On the other hand, MSE have downloaded an initial timing setup to me that may or may not use that same offset (they didnt have a figure available for
the AJ30)
I wonder what would happen if I change it to 310?
hmm thanks
[Edited on 8/11/24 by spegru]
MikeR - 8/11/24 at 03:43 PM
Are you both triggering on the same tooth edge - the teeth edges are 10 degrees apart so you could in reality be 2 degrees different.
spegru - 8/11/24 at 06:43 PM
Oh dear I actually dont know the answer to that important question.
As much as 10 degrees?! I am surprised its as much as that with the internal teeth (or whatever they are)
Certainly 2degrees would be within margin of error
The thing is running so roughly that Ive been trying everything without success and it makes little difference so far
This afternoon I even tried altering to 310 ATDC to match the 50 BTDC mentioned above and even that made no real difference
And now I cant be sure what I was using to get the offset in the first place!
I shall have to go back and check it all again no doubt.
In the mean time I suspect a faulty crank sensor so Ive got one on order..
Thanks for those comments!
spegru - 12/11/24 at 08:11 PM
This afternoon I took delivery of a new crank sensor so I went back to look at this again.
One of the problems I am having is uncertainty about the polarity of the connector, especially as I am not currently using the proper plug as
it's broken. It appears to be the same as for Cam sensors but different to Ford 4 Cylinder Duratec sensor plugs (the AJ30 is really a Ford
Duratec v6).
I am guessing that could be a Mazda type due to its parentage? My Jaguar S Type Wiring diagram doesnt help because it just shows what pin is
connected to what with no - VR+/- etc. For now I am using miniature spade connectors directly onto the sensor. I suspect the pins are numbered left to
right with the tag side upward?
Bear in mind that are no plug leads so I've had to rig up an extension with a plug lead from another car in order get my timing light working!
With all that in mind I got the following
With VR+ connected to the left sensor pin ( clip side upward) my timing light syncs with TDC as follows
1, 285deg ATDC (75 BTDC) - Falling edge trigger
2. Timing light fails to flash with Rising edge trigger
VR+ on the right
1. 280deg ATDC (80 BTDC) - Falling edge trigger
2. 285deg (75 BTDC) - Rising edge trigger (NB the 5deg difference)
Because this didnt line up with my previous 305 figure I checked my TDC mark - but that hardly changed. My new marks are closer to the pointer,
reducing a bit of paralax error though. I then retested as follows
VR+ on the left
1. 290 ATDC (70 BTDC) - Falling edge
2. Timing light not working - Rising Edge
VR+ on the right
1. 290 ATDC (70 BTDC) - Rising edge
2. 285 ATDC (75 BTDC) - Falling edge
I guess this tallies with a tooth that is 5 degrees wide and that the different wiring option converts rising to falling etc.
The only explanations why I am seemingly nowhere near my previous 305 ATDC is that I have a new Sensor and maybe reduced a bit of error - but so
much?!
I note that the screenshot above specified 50deg, Rising edge and I am well away from that. This is an early AJ30 and I know that later ones as used
in the Jaguar XF are visibly different in the timing chain area so maybe that's why?
As ever any help appreciated - connector type and pin numbers especially
[Edited on 12/11/24 by spegru]
spegru - 13/11/24 at 12:48 PM
Followup on this.
I've just noticed that not only the Crank & Cam sensors but also the Coil on Plug (COP) devices all have the same type of plug!
It's therefore possible that the correct plug is this one:
Ebay
link
Although these are for a 4cyl Duratec they do look the same so Ive ordered some
Also from looking at COP No1 and the Jaguar wiring diagram for the ignition coils:
a) Pin 1 is on the left as you look at the socket on the device with the tag/grooves upward (as I thought)
b) Pin 2 is COP 12v, and ECU COP Signal is on Pin 1.
And from the Jaguar wiring diagram for the Cam sensors:
CMP1 pin 2 is a common ground whereas CMP2 pin 1 is that common ground! which seems a bit bizarre because it implies that the sensors dont care which
way round they are wired (but does it invert expected the cam pattern?
Some of you guys have got this engine running so
help appreciated etc!
Esp Crank polarity and did you sync Cams?
[Edited on 13/11/24 by spegru]
spegru - 16/11/24 at 01:05 PM
Duh!
I just realised that when I did those recent ~285deg ATDC crank sensor offset measurements, the ECU was probably putting in its own Advance figure for
turnover!
So now I need to measure again.
Certainly a better explanation for the discrepancy than fitting a new sensor
[Edited on 16/11/24 by spegru]
[Edited on 16/11/24 by spegru]
spegru - 16/11/24 at 03:01 PM
Indeed. That error was definite
So now with slightly easier to read timing marks and and VR+ on the right (looking into the sensor with clip/ridges upward) we have TDC timing of:
300 deg ATDC (60 BTDC), using rising edge trigger
295 deg using falling edge trigger
I'll be using the Rising edge setting for now
This is a 300deg ATDC/ 60deg BTDC Crank Sensor Offset
spegru - 17/11/24 at 12:39 PM
In fact those Duratec 4 cylinder COP connectors do not fit - either the Jaguar AJ30 COPs or the Crank/ cam sensor. Very similar, but different.
So those will be going back then
[Edited on 18/11/24 by spegru]
mgb281 - 19/11/24 at 08:47 PM
If you can wait a week or so I am about to buy a 2.1V6 engine and providing the pallet company does its work then you can have both the sensor and the
plug with a length of wire FOC. I am only buying it for a mock up so don't need the wiring, sensors etc. This is assuming that they fit the
earlier S type engine. I bought an ex Rocketeer ME442 with a Rocketeer loom, strangely the VVC, an O2 sensor or knock control was never included in
the loom, hopefully I will have mine running next summer
By the way the Jaguar shares no parentage with the Mazda engine. The Ford/Jaguar engine was an abandoned Porsche design which was bought by Ford,
further development was done by Cosworth before being put into production at Ford's Cleveland Plant. It also shares some detail with the SHO
engine developed by Yamaha for Ford, there was actually a 60 degree V8 version of the SHO engine
mgb281 - 19/11/24 at 09:16 PM
pre 2002.5 engines used two pin COPS later ones used four pin COPS have you got plugs for the later engine?
spegru - 20/11/24 at 09:22 PM
Thanks for the offer mgb281. It could come to that if yours are the same. I do still have an original loom but it appears to very poorly screened so
ive set up some external screened cables.
It is an early '99 engine with 2 pin COPs. The crank and cam sensors all share the same 2 pin connector that is similar but different to the 4cyl
dratec items i found.
The sensors are stamped with the Ford logo so it shouldnt be that hard surely!
I have the whole thing jury rigged with some miniature spade terminals for now.
On another note, although the engine fires it always conks out after 30-90 seconds
Is there anything weird i should look out for, perhaps the presently disconnected VVT, or IMT setup?
mgb281 - 21/11/24 at 06:58 AM
Text I have been very slowly progressed with fitting a AJV6 into a MGB but now that I have retired the progress is a little quicker, I
media blasted the bodyshell in September and have now epoxy primed the whole of it and base coated and clear coated the interior and underneath. Due
to the cold weather I am now looking at starting the wiring of both the whole car and the engine.
I found the ME442 on the piston heads forum where a Rocketeer owner had replaced it with an MBE ECU, Rocketeer had a big fallout with ME over the ECU
installation and offered a low cost upgrade to the MBE. Before I purchased it I spoke to the Rocketeer owner, ME and one of their preferred rolling
road tuners. ME said the poor running of the AJV6 with the ME442 was down to the lack of sensors to control the engine properly, ie no O2 sensor to
provide closed loop running, Rocketeer wanted a vey simple loom. The Dyno tuner said that he had seen the early Rocketeer inlet manifold and thought
that the whole poor running, cold start etc was down to the idle valve pipe being too small to flow enough air to give a stable idle and cold start.
The Rocketeer owner confirmed that the idle valve pipes had been replaced with bigger ones, he also confirmed that the MBE also took a long time and
several visits to Basset Down before it was acceptable. Although none of the above applies to you there must be something wrong with the installation,
is the DBW controlling the idle or is that causing the rough running? Is that possibly caused by a faulty temperature sensor not allowing the ECU to
adjust fuelling as the engine warms up?
Finally I did some searching several years ago about fitting a Megasquirt ECU and at the time Extra EFI seemed to be more geared up to supply a three
coil pack wasted spark ignition system. After further searching I found that a lot of S Type owners have poor running problems that are difficult to
cure, it appears to occur when the ignition plugs are changed, some owners had changed all the COPS to cure the problem. Even the Jaguar ECU fault
codes didn't point to where the problem lay. This is why I am considering getting rid of the COPS.
spegru - 21/11/24 at 09:04 AM
Thankyou so much MBE281, There is a huge amount in that response.
I chose ME because someone I semi know has anAJ30 running with one of theirs in a Healey replica. Unfortunately he's been useless with any
assistance though.
Although I knew of the Rocketeer MX5 AJ30 conversions I didn't know ME connection until recently.
All that back history probably explains a comment from them that they 'used to do a wiring kit' for the AJ30.....
The Rocketeer Inlet plenum does look very pretty in carbon etc but it looks very simple vs the Jaguar setup that I am using - and very expensive
I am running a wideband sensor that I would have thought should do a fairly good job sensor wise, along with Inlet Air Temp and MAP.
I am going DBW as that's what the engine had on it, although I could not use the actual '99 vintage item so I'm using a modern Bosch
73mm Throttle Body unit that ME recommended. Idle air control should not be an issue as that's all under ME360 control via that. Mechanical
throttle response seems good although one of the current symptoms is inability to rev (it stalls instead). I dont think DBW is at fault as at least
there is some reaction from the driver's seat for that.
I can see that we have alot more hat we could discuss. A pity that you are 100+ miles away. I shall try to send you a U2U and perhaps speak on the
phone?
Regards
Steve Pegrum (aka spegru)
40inches - 21/11/24 at 10:10 AM
This seems to be getting very complicated
As a comparison, here is my initial set up:
When I started this project back in 2014 there was very little information available, so I had to make it up as I went along
So I kept it very simple.
NO idle valve
NO VVT
NO cam sensor
Ford ST220 throttle body.
And after doing a bit of research on Jag forums NO COPS, just a Ford V6 coil pack and ST220 plug leads.
The ECU came down to Megasquirt or Emerald.
I chose an MS2 Xtra because of price and VEAL, aka Auto Tune.
Using the supplied Ford Iron V6 Msq, and 1/8th throttle it started first time and ran nicely, if a little lumpy, switched veal on and left it for 30
minutes
to set the idle tune.
Then ran it for around 100mile with VEAL on.
A rolling road check had it at 242 bhp and 230 ftlbs torque with a little ignition change.
With VVT activated 172 BHP, the same as Rocketeer, but around £4000 cheaper
A big thanks to Joolz at Kits and Classics for setting it up on the rolling road.
[Edited on 21-11-24 by 40inches]
spegru - 21/11/24 at 10:44 AM
Thanks 40inches. Yes it does seem that we/I may have overcomplicated this. TBH I thought it would be easier esp considering by experience with Omex
& Zetec a few years ago
As of now, i've got Cam sensors switched off (it wont sync so that's another problem), no idle valve but I do have the early Jaguar COPs.
and chose ME360 for the reason above only. What inlet did you sse with the ST220 throttle body? The ford one? I'm just wondering if my currently
not working Jaguar IMT manifold valves have any responsibility here.
I just cant work out what is going on, Normally conks out after 20-30secs although I did get 3mins after I got my wideband sensor connected yesterday.
I do have a call scheduled with ME for later today but I'm struggling to believe there is any fundamental problem
By the way though did you ever manage to identify the crank sensor plug?!
[Edited on 21/11/24 by spegru]
40inches - 21/11/24 at 12:05 PM
Used the Ford ST200 manifold with a spacer.
Description
spegru - 21/11/24 at 01:13 PM
So here I am in the garage on a freezing cold day I just found something interesting
Just now I noticed that my fuel pressure guage which is connected right next to the fuel rail extremely unstable while running. I imagine that is
because of the injectors opening and closing but could that be anything else? I did disconnect the fuel line into a coffee jar and it certainly pumps
well: ~2litres in about 20secs.
Perhaps I did not mention clearly that as well as only lasting for a few 10s of seconds, the running is also rough if I try revving at all
So I looked at the mapping using the MEITE software and got this:
You can see where the engine has been going from the thin yellow trace
Looks like alot of leaning out going on? But why? Related to the flickering fuel pressure? If not then??
[Edited on 21/11/24 by spegru]
spegru - 21/11/24 at 07:59 PM
could the leaning out be caused just by an air leak?
mgb281 - 22/11/24 at 09:06 AM
quote:
Originally posted by spegru
So here I am in the garage on a freezing cold day I just found something interesting
Just now I noticed that my fuel pressure guage which is connected right next to the fuel rail extremely unstable while running. I imagine that is because of the injectors opening and closing but could that be anything else? I did disconnect the fuel line into a coffee jar and it certainly pumps well: ~2litres in about 20secs.
Perhaps I did not mention clearly that as well as only lasting for a few 10s of seconds, the running is also rough if I try revving at all
So I looked at the mapping using the MEITE software and got this:
You can see where the engine has been going from the thin yellow trace
Looks like alot of leaning out going on? But why? Related to the flickering fuel pressure? If not then??
[Edited on 21/11/24 by spegru]
If anyone is interested I have a ST200 inlet manifold on Ebay at the moment, also a ST220 lower manifold with the tabs already welded on and ready to be milled down to the correct height. I simply didn't have enough height or room for it on a MGB so have gone for a modified ST220 one. I haven't found a way to add photos from my phone yet, can anyone guide me.
40inches - 22/11/24 at 09:28 AM
quote:
Originally posted by spegru
could the leaning out be caused just by an air leak?
I ran an S type for 2 years while building mine, and leaks in the breather system are a common problem.
The crankcase PCV valve and hoses are a nightmare, I removed the valve from the crankcase vent and
vented to atmosphere via a small filter, linked the cam cover hoses and fed into the inlet just after the air filter.