High ohm injectors, does pwm always has to bee 100% and 25,

cossie_storm · Post by **cossie_storm** » Tue Jul 18, 2006 11:46 am

High ohm injectors, does pwm always has to bee 100% and 25,5 ms?
i have some tach spikes random. rpm drops about 1000 rpm.
is there any idea to change pwm? or should it always be at 100 and 25,4?
woundering..

keithmac · Post by **keithmac** » Tue Jul 18, 2006 1:18 pm

I run highZ injectors with those settings and have no tach problems, I`d be looking into the wiring. They aren`t designed to run peak and hold so if you altered the PWM you`ll probably just see bad side effects and no benifits.

cossie_storm · Post by **cossie_storm** » Thu Jul 20, 2006 2:07 am

okay. thanx. youst cheching every possible soloution..

keithmac · Post by **keithmac** » Thu Jul 20, 2006 9:16 am

Which car is it? if either run Edis you could try resistor spark plugs to cut down any interference to the MS unit.

cossie_storm · Post by **cossie_storm** » Thu Jul 20, 2006 10:17 am

hi
it is a ford sierra. efi.
i am running tfi spark pullop...
you could try resistor spark plugs to cut down any interference to the MS unit.??????