HELP PLEASE

[amacha]

Hi all i havea mivec controller was working fine doign what it should has two lights on it one says high and ones says low low is when mivec isnt engaged.Now today i was isntalling a aftermarket tacho all i installed was the ground wire and the red wire which i jammed in to the 15A fuse and now it says mivec is always engaged?? liek the light on high is on and u can tell on lower rpm them car is kinda struggling doesnt have as much power so mivec is permanently engaged since i disconnected the battery does this have something to do with it?

I havea also noticed when tthe engine is running and the car is in neutral it says mivvec is engaged and as soon as i turn the engine off but leave the keys in and therefore ful electics in the car the mivec status goes to low any ideas guys?

Please help

P.S the battery was disconnected for more than 30 mins so does this mean the ecu has rset has this got osmething to do with it? Is it possible if i remove the mivec controller and then unpulg my battery for another 30 misn will the engine reset and become normal again (so mivec kicks in at 5500)?

[Muad_dib77]

If you disconnect the tacho does the problem disappear?