MSefi.com read only forum (Jan.15,2018)

Mercedes-Benz 380SE
3.8L v8
MSII latest version
Wideband LC-1
remanufactured flow-matched ford 19lb injectors

Hi, I'm having idle setup dramas, I have the car set up for 4 squirts/cycle but i've had to set the injector opening time to 1.2 seconds to get a good idle. The idle is quite bad as well. I'm sure this is making up for a bad setting somwhere else, but not sure what. I noticed that the idle pulsewith is only 1.6-1.8ms, which I believe should be over 2 for proper tuning. When I set it to 2 squirts/ cycle the engine coughs and splutters and dies after about 10 seconds. If I have the car in gear and brakes on, with a little throttle, the engine seems to run fine.

How to increase the idle pulsewith?

-Thanks!

harlz,

MS-II does not have as serious issues with low idle as MS-I does. 1.6 to 1.8 milliseconds is not too low, in general.

However, to increase the idle pulse width you need to decrease the number of squirts. The standard recommendation is for 2 squirts alternating. You will have to retune the VE table to get a decent idle if you do that, there are instructions here: http://www.megamanual.com/ms2/tune.htm#ve But first set your injector open time to 1.0 then never change it again (unless you have a good reason to and some empirical evidence to back it up) - every time you change this to something else you have to retune the VE table (especially at low pulse widths). So go back to a reasonable opening time, and tune idle using the VE table instead.

Lance.

Ok, I'll give that a shot, thanks.