PCM programming

[Cider Andy]

I've been looking around for a replacement QVFA engine for my LWB high roof FWD T300 mk7 that doesn't cost twice as much as the van's worth, but without success. I do have a good P8FA engine but I didn't think Ford had ever put the 85bhp engine in a van this size. It turns out I'm wrong; they did!

So the current plan is to fit the P8FA and mess around with the QVFA on the bench* with a view to refitting it if all it needs is a timing chain. Which brings me on to the PCM. I'll be setting the existing PCM aside so it can be simply refitted if I go back to the original engine. Meanwhile I'll be fitting the PCM that's mapped for the 85bhp engine. Will I need to do anything with the replacement PCM in terms of programming it?

*by "bench" I mean this. In the winter. Yippee. You guys with workshops don't know you're born.....

[knobby1]

I think you just need to let all the other modules know you've changed the PCM, they all talk to each other to some degree.

Lord Knobrot

[Cider Andy]

So it's just injector codes, pilot & pump learns?

[andz327]

So it's just injector codes, pilot & pump learns?

No need to change PCM, just put your electronic turbo onto new engine and plop it in and turn the key, with just the injectors to code and do learns or put you injectors in in same order and just do learns
I've had a couple of chains snap on my own 130 and it done no damage, and im not lucky in any shapae or form maybe worth checking before pulling the engine oot
And just to let you know i fitted solid mass flywheel around 200,000 miles ago and never had a problem, used luk clutch parts for 85ps and 110ps which are solid mass but mine is only 5sp
ANDZ

[paul2012]

QVFA (110ps) engines, pistons have oil cooled crowns & P8FA (85ps) don't.


P8FA (85ps) pistons

IMG_1255.JPG

QVFA (110ps) pistons

IMG_1303.JPG

To be blunt. P8FA (85ps) have different pistons than QVFA (110ps)

[andz327]

QVFA (110ps) engines, pistons have oil cooled crowns & P8FA (85ps) don't.


P8FA (85ps) pistons

IMG_1255.JPG

QVFA (110ps) pistons

IMG_1303.JPG

To be blunt. P8FA (85ps) have different pistons than QVFA (110ps)

Yuip your right but he's not swapping pistons he's changing engines until his is sorted, personally I'd fix the timing chain problem rather than swap, i only changed over to my electronic turbo and put my own injectors in last December, I've done 65,000mls since but i guess it doesn't work

ANDZ

[Cider Andy]

... I'd fix the timing chain problem rather than swap, i only changed over to my electronic turbo...

The problem is, I don't know if it is the timing chain. It could be a cracked piston or even something else. My reasoning is it will be easier to diagnose and repair on the bench than in the van, plus I have to get the 85 out of the scrap van and get rid of the shell off the yard so I'll have it to hand anyway. It's probably easier to remove and replace the engine/gearbox as a unit than to dismantle the engine in the van (he said, hopefully!!!).

The PCM issue comes down to the fuelling map which, logically, must reside on the PCM? Because of the difference in the pistons between the 85 and the 110 I don't want to be running the 85 at a higher output and risk melting the piston crowns!

(Both 85 and 110 have the same mechanically actuated turbo. Or, at least these two are the same....).

[andz327]

... I'd fix the timing chain problem rather than swap, i only changed over to my electronic turbo...

The problem is, I don't know if it is the timing chain. It could be a cracked piston or even something else. My reasoning is it will be easier to diagnose and repair on the bench than in the van, plus I have to get the 85 out of the scrap van and get rid of the shell off the yard so I'll have it to hand anyway. It's probably easier to remove and replace the engine/gearbox as a unit than to dismantle the engine in the van (he said, hopefully!!!).

The PCM issue comes down to the fuelling map which, logically, must reside on the PCM? Because of the difference in the pistons between the 85 and the 110 I don't want to be running the 85 at a higher output and risk melting the piston crowns!

(Both 85 and 110 have the same mechanically actuated turbo. Or, at least these two are the same....).

Its up to you mate but mine is a 130 and don't have any problems 65,000mls on and she cruises at 100mph frequently
Good luck

ANDZ