MSefi.com read only forum (Jan.15,2018)

Hi,

[those of you in a hurry please start below at the ">>" mark]

those busy at the ignition part of this forum know how I struggle to get my Rover V8 (4.2l) with EDIS running. The timing problems I think can be called ok by now, timing is 11deg in no-saw mode which can stay there fore the while.

I thought I could start to tune but not so. Would have been to easy, I guess.

The engine was hard to start, playing with ReqFuel didn´t help. I soon recognized it could be helped into life with flooring the accelerator pedal a little. It then could be kept running, but doing so very very roughly and vibrating badly. At least the new cam could gain some oil at the higher revs.
Time to think again (fears went like "camshaft timing out of phase .. pulling it all to pieces again" and the like) until I thought of removing the spark plugs:

>>
From the 8 spark plugs 5 were black/coated with carbon and 3 were absolutely clean. The latter are plug 1,3 and 4.
Surely that explained my AFR reading (EGO sits in the right exhaust downpipe, therefore was affected by cylinder 4) jumping and bad running. Meanwhile the engine warmed up and would start readily and shake less badly, but it sounds (especially from the left head) like I had no exhaust installed at all.

I can offer an explanation for that: the injectors had been cleaned and flow tested. The company told me not to do this months before putting them in service because the cleaning fluid might cause them to stick. The injectors have been assembled 3months ago because without doing that I wouldn´t have been able to assemble the engine further and cannot work on it every day, thus it took that long. I took a steel rod and used that to punch the offending injectors with some not too hard hits with a small hammer (that`s what the company adviced me) I´m not sure that helped.

Do you have any idea what else I could do ?
Certainly has to be sorted before doing any tuning.

How about the following:

1) Disable the fuel pump
2) Activate injector test mode and "excercise the injectors for quite a while (5 minutes??)

My thinking is that without the fuel pressure behind the pintle, maybe the opening force will be enough to break the stickyness?

Using injector test mode is the easiest way to activate the injectors without cranking the engine. I have seen posts where guys battled to get MS back to normal mode. I played with ITM and did not experience such trouble - at least not that I can remember.

MAKE VERY SURE that MS is back in normal mode before activating the fuel pump again. Otherwise you will have fuel squirting into your engine when it should not. If you do battle then just burn the fw again and upload your MSQ.

Hi Philip,

what a smart idea.

Do I have to activate the test mode several times in order to get a proper time of exercise ? I remember there is such a thing like "number of pulses" with a default value of 400 (IIRC).

There are only 3 parameters to set
1) the number of pulses (suggest you set this to a high value eg 2000 - there might be some max value but I dont know what it is)
2) the pulsewidth of each pulse (suggest 1.7ms = just longer than opening time which I found to be around 1.4ms)
3) time between pulses. This you can also set short such as 0.5ms.

I am confident that you should be able to hear each injector individually with a piece of rubber pipe .

Hi yall,

I tried it with the Testmode. Philip, like you mentioned I couldn´t get back into normal mode afterwards. MS did not accept the "burn" command and rebootet in Testmode persistently. You saved the forum another thread by telling me allready that reflashing the code was the answer to carry on in normal mode.

The injectors were very easy to hear. I tapped them with a piece of aluminium rod (helped by my tiny hammer) and used the rod like a stethoskope. Without doubt the injectors in question clicked happily.


>> so back again to the Ignition forum in my old thread there !!!