tach not working

[gunmetal240]

i recently finished my rb20det swap and my tach was working til i crossed a wire with the tach wire for a second. Now its non responsive when i start the car ...ive changed the gauge cluster and still nothing. where do i start looking?

[Infinitiguy19]

Check the ECU as you may have fried part of it.

[gunmetal240]

oh i hope not rb20 ecus are not cheap
but the car starts fine and runs strong

[sldewyz]

check ecu..then see if the speed sensor is good. you might have just smoked the sensor and might need a new one?

[gunmetal240]

the speed sensor has nothing to do with the tach signal

[kguittar]

When you say you switched the gauge cluster already do you mean you got a gauge cluster from a ka24de? I had the same problem but it was because I was going from SOHC to DOHC (ka24e --> SR20det). So.....either that might be the problem or my mechanic got me good b/c I don't know what SOHC and DOHC has anything to do with it but it sure solved my problem.

Good Luck!