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

 

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

 

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.

 

As John says.

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

 

thanks just arnt sure what iv got

 

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

 

Also what is the difference between :

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

They are both L8 ECUs I recon.

 

One has catalyst friendly software inside and one does not.

 

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.

 

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.

 

Ok, thank you Stu !