Fuel Injector Correction Values, No Firing Order Required?

[Stewarty1]

Hello all,

Question regarding my Mk7, 2010, 2.2 SRFA, 115ps Engine, and coding in new injectors. Van has just clocked 150k last week and I have decided to renew the injectors.

Whilst doing some research to establish the procedure and FORScan. I realised there was considerable talk and confusion about firing order and cylinder designation for coding into the PCM.

Not wanting to get in a confuddle, and the injectors being the original factory injectors in the engine. I decided to extract the current coding from the PCM using FORScan and check which injector was where in terms of cylinder designation. I discovered the injector correction values etched on the original factory injectors matched the extracted info cylinder per cylinder precisely, as in the FORScan diagram extracted info.

Van Injectors.jpg

My intention now is to simply enter the correction values in the cylinder sequence outlined as per the extracted FORScan info, with the new injector correction values corresponding to each injector in respect of cylinder sequence placement.

What are the thoughts about this and does anyone have info to the contrary that may define that the firing order method is to be applied irrespective of the FORScan information?

I'm not 100% sure that there may be some trick up a sleeve somewhere with FORScan that I've overlooked... or if it's just me just being over cautious!

Thanks in advance for your thoughts.

[knobby1]

Hello all,

Question regarding my Mk7, 2010, 2.2 SRFA, 115ps Engine, and coding in new injectors. Van has just clocked 150k last week and I have decided to renew the injectors.

Whilst doing some research to establish the procedure and FORScan. I realised there was considerable talk and confusion about firing order and cylinder designation for coding into the PCM.

Not wanting to get in a confuddle, and the injectors being the original factory injectors in the engine. I decided to extract the current coding from the PCM using FORScan and check which injector was where in terms of cylinder designation. I discovered the injector correction values etched on the original factory injectors matched the extracted info cylinder per cylinder precisely, as in the FORScan diagram extracted info.

Van Injectors.jpg

My intention now is to simply enter the correction values in the cylinder sequence outlined as per the extracted FORScan info, with the new injector correction values corresponding to each injector in respect of cylinder sequence placement.

What are the thoughts about this and does anyone have info to the contrary that may define that the firing order method is to be applied irrespective of the FORScan information?

I'm not 100% sure that there may be some trick up a sleeve somewhere with FORScan that I've overlooked... or if it's just me just being over cautious!

Thanks in advance for your thoughts.

Your thinking is correct, just enter the numbers as in the picture...I believe earlier versions of Forscan may have used the firing order but not these days.

The correction factor numbers are primarily to get the fuel injectors fueling in the ball park, old/used injectors will have drifted away from new settings, the final correction learns will then establish correct timing and flows. The engine should run even with the incorrect numbers applied....even if only poorly.

Lord Knobrot

[Stewarty1]

Thanks for the reply Knobby1 much appreciated.

I would be grateful for your advice about the pump learn procedure.

After fitting the 4 new injectors, I done the coding and the pilot learn and all went good, the van seemed very responsive and got straight of the mark and pulled in every gear. Best it has felt for a long time!

However, I read on hear that it was a good idea to then do a pump learn and do a pilot learn again. So after the initial first success with the coding and pilot learn just to make sure all was ok, that seemed like a good idea. I have never done a pump learn before and the van has not been back to Ford since July 2011 when it was in for a steering recall. (November 2010 registered)

I done the two procedures and the van is still running great, but feels like it has slightly lost the edge that it had gained...

But here's a query based on my unfamiliarity of the procedure with FORScan, and being unable to find any info about it online. I don't think/am unsure that the pump learn procedure was completed successfully!

FORScan never asked me to start the engine! Does the procedure require the engine to be running? And, initially at the start of the procedure, FORScan stated that a DTC error code would be registered automatically and indeed there was a fault code logged as a DTC. I assumed that this was par for the course so to speak as it was not the Ford software being used... I simply cleared the DTC and the van is fine. The code hasn't come back and nothing else untoward has happened, all is good!

Here are two images of the completed procedure and the fault code generated.

I got 4 new genuine Denso injectors at an unbelievable price from a company I hadn't heard of.
After pricing up straight from Ford and comparing online reconditioned injectors and the cost of my local guy reconditioning, I decided to just buy 4 new ones.
Very expensive business and left me skint... I'm always trying to keep ahead on our family van to try to avoid breakdown hassle...

Any advice about this scenario would be greatly appreciated?