Different car, same engine, totally different SOI

by **rlees85** » Mon Jul 15, 2013 11:49 pm

I cracked open the MAP file from my 2003 206 HDI 2.0 90 and thought I'd compare it with the original MAP from my 2000 306 HDI 2.0 90 that I used to own a while ago...

Not surprisingly, as the engines are similar, most of the maps are similar, with very subtle differences in the smoke and rail pressure maps. Very tiny differences in the torque limiter.

But the SOI maps are all over the place! Its like it is from a different engine in certain areas of the IQ/RPM range. I am just wondering why would this be? Why would the timing be so different on the same hardware? (unless the turbo/etc is different. Injectors are 100% the same as injector timing maps are identical!)

Also why would subtle differences be present in the other maps?

(Looking at the picture, ignore the red text! All original values are currently shown)

Cheers for the help!

by **eps** » Tue Jul 16, 2013 12:03 am

Good Post! :thumbup:
not have the files?

by **rlees85** » Tue Jul 16, 2013 2:13 am

Yeah sure...

The 206 is muxed...
The 306 was not.

If anyone knows about the above I'd love to know though!!

by **alex_sk** » Thu Jul 18, 2013 1:02 am

Different Rail pressure maps give different SOI maps for identical injectors.

by **rlees85** » Thu Jul 18, 2013 6:59 pm

The rail pressures are only marginally different though....

I am wondering if it is to do with more tight emissions standards too. One car is 2000 and the other a 2003. I am guessing emissions standards are much tighter in 2003 ... just a theory. Still doesnt help me decide what to do with it though! :?

by **alex_sk** » Thu Jul 18, 2013 11:11 pm

If 2003 SOI late than 2000 this is emissions related. Late injection produce less NOx and more smoke, but smoke cut by DPF.
Pilot-injection maps from this engines identical?

by **nagliy_root** » Thu Jul 18, 2013 11:24 pm

i think they can't be identical

by **rlees85** » Fri Jul 19, 2013 10:47 am

Seems the 2003 is retarded lower down but advanced higher up. Neither car has DPF...

I'll check out the pilot injection maps later (not on a PC with WinOLS at the moment!)

by **ross2482** » Fri Jul 19, 2013 1:01 pm

Can you post the other SOI maps out of each ECU? There are 2 main SOI maps in these files which are slightly different to each other. Checking my library of 2.0 110 HDi files, the SOI seems the same for all years...!