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I just bought an aftermarket tachometer at Kragen. I tap the green wire(rpm) straight to the ECU rpm wire. I just found out that doing 80 miles/hr, I am only revving 3200-3300 rpms instead of 3500rpm. Is the tachometer right? Coz my friends hondas do 3500 rpm doing 80 miles/hr. I'm just wondering if my tachometer is reading accurately.

 
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i put a tach on my old lincoln and i believe u need to tell the tach how many cylinders does the engine have.

i have a question, can u put a cluster guage from civic lx in a dx so i can have a tach and stock look.

 
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you should probably ask they guys in 6th gen because they do it all the time

 
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well i nosed around on google. all the posts i read say its a straight hook up and nothing else has to be changed. will find out when i change it i guess. now i need to see if i can just swap the tach so i do not have to get it reprogrammed to read the right mielage