TACHOMETER SIGNAL FILTER

Thank you for your question. The tach filter is designed to eliminate or reduce erratic and bouncing pointer movement caused by things like RF noise. We have only tested this with Autometer tachs and do not have any information on if the EB- 7A would benefit from our tach filter.

Intellitronix told me close as can get to the gauge as I can

Thank you for your question Dan. Please give our tech support team a call so we can dig into this and understand your setup a bit better. We can be reached at 866.248.6357

Thank you for contacting us. Could you provide us with more information on this? What is the unit number? Is it an Autometer product? If you could, reach out to [email protected] and contact a representative that will gladly assist you on this.

Thank you for contacting us. You will need a 9117 to obtain a proper signal for the tachometer.

It will work, hook up to coil follow install instructions. Use a Engine block ground NOT common body chassis ground (wire your single wire ground by itself)

Check your ground, the tach should have a separate ground preferably to the engine block NOT a chassis block ( everything in your vehicle is connected to the central chassis). When you connect to a common ground you can get erratic signals (RF) from various sources ie: radio, stereo speakers, alternator, wiper motors, heater/ ac motor and most common old spark plug wires and non supressor spark plugs. The filet can only so much RF ( that’s what it’s designed to do) but if incorrectly installed) you will get irractic RF. My advice-  change your ground to a single wire connected to the engine block and check/ change plugs and wires. Good luck

A filter could help, check your grounds, isolating aftermarket grounds will help a lot. Community grounds (chassis grounds build up RF interference) ground one or both to the engine block ie isolating the ground wires from the chassis. Hope this helps,  ps using filters always helps Getting rid of RF signal noise