When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I don't believe you can tap in to any wires. The ECU sends the data to the cluster through a can bus. You'll need to tap the raw ignition wires or the crank angle sensor to get a valid RPM reading.
