nick8saff

how can i tell which ecu i have. im going for closed loop and need a l8 or p8 but i dont no the difference

tabetha

I think L8 were sierra and P8 were escos, best ask stu to be sure he will know.
tabetha

jon@work

iTrader: (5)

The easiest way to distinguish between the early Weber-Marelli management systems is by the colour of the fuel mixture trim screw in the box. On the front face of the management box, where the large wiring loom plug fits, is a recessed hole, with a small plastic screw visible.
• The early hatchback systems have a yellow screw (L1);
• Four door cars have a white screw (L6). Also, the Weber-Marelli Level 6 systems have a mounting flange on their front face to fix them into the car.
• The Level 8 & P8 systems do not have a mounting flange; the sides of the box are smooth. Only the very early P8 systems were fitted with a mixture trim screw, but as an extra check, the Level 8 systems have a red or green sticker on one of the covers, this will have WD48.08 printed on it. P8 systems have a white sticker, and this will read IAW48/P8.

Stu @ M Developments

iTrader: (12)

As John says.

To elaborate slightly, only the 2wd 4 door cars were fitted with a Level 6. All the 4wd sierras were L8.

nick8saff

thanks just arnt sure what iv got

Stu @ M Developments

iTrader: (12)

Take a pic of the front and inside then pal and we will tell you.

Mad Matt

iTrader: (2)

Also what is the difference between :

WD48.08/L3E-31 and WD48.08/L3H-34

They are both L8 ECUs I recon.

Stu @ M Developments

iTrader: (12)

One has catalyst friendly software inside and one does not.

Mad Matt

iTrader: (2)

Yes, but both does have the red sticker isn't is ?

There are 3 L8 ECUs :

WD48.08/L3E-31 (red sticker)
WD48.08/L3H-34 (red sticker)
WD48.08/L3H-93 (green sticker for catalysed car)

So you mean that one of the 2 red sitckered ECU has a catalyst software inside it, but isn't used ?

Thank you for the explaination, Stu.

Stu @ M Developments

iTrader: (12)

Yes, one is catalyst friendly but it was never enabled and run due to no input, although ive seen teh same one running overseas with it active, so who knows, maybe a territory thing. The greentop strategy L3H93 was active in all territories.

Mad Matt

iTrader: (2)

Ok, thank you Stu !