Ive got a 91 si with a b16 swap, my monster tach moves slightly at idle when the car is warmed up and i turn the blinkers or the wipers on..the power wire is hooked into the fuse box and the tach wire is hooked right to the dizzy..could it be the ground wire isnt good enough? im stumped

 

I was gonna say ground wire.

 

Yeah, just as a test, I'd run a wire straight from the neg battery terminal to your tach ground wire to see if it helps the problem. If so, you've got a dirty ground.

 

make sure that you have ground on the body and run you 12V. power wire to the ign. in the acc position not to the fuse box (most peoples first mistake).

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fastlx-i &raquo;</TD></TR><TR><TD CLASS="quote">make sure that you have ground on the body and run you 12V. power wire to the ign. in the acc position not to the fuse box (most peoples first mistake).</TD></TR></TABLE> Not true at all

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fastlx-i &raquo;</TD></TR><TR><TD CLASS="quote">make sure that you have ground on the body and run you 12V. power wire to the ign. in the acc position not to the fuse box (most peoples first mistake).</TD></TR></TABLE>

Do explain.

 

There are extra male plugs in the fuse box for accessories such as this so that part isnt wrong... I will change the ground and see if that helps, not today though because its 0 outside.. thanks for the help guys

 

i always grounded everything around that nut that holds the fuse box up it works great, i have about 3 things grounded to it