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

I have this setup on my flat 4....I was getting a very unstable MAP signal so I tied all 4 vacuum ports to a fuel filter and inserted a mig .028 orifice into the line to the Map sensor. This smoothed out the signal much better. Added a little filtering to the signal and now all is good. With the lar...

Hi, Something does look odd.... I have a somewhat similar motor...only 103 by 80 with a split duration cam. I idle in the high 50 to low 60kpa. my idle is high at around 1200rpm but really doesn't change if I lower it to around 800. Still 58 to 62 kPa. I thought about using a smaller orifice restric...