ok all morning i have been wiring up my edfc for my tein suspension and when i went to start my car the tach needle went up to 5grand and stayed there for a little bit then went down to the correct speed the motor was running at and the speedometer did the same but it went down to 0mph when i turn the car off the fuel gauge will go far right and stay there until i turn the car on then off then it returns back to the normal position. i cant figure out whats going on! NEED HELP!!!

 

Try checking grounds???

 

well sounds like mayb u messed with sumthing wen u wired ur edfc..hmmm...this never happend b4 right??

 

no but i finally figured it out it was the back up fuse i thought i checked over all the fuses but i guess i missed that one oh well