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Subaru Impreza WRX STI Problems

Engine Misfire Due to Failed Spark Plug Wires on Subaru Impreza WRX STI

Problem Description and Possible Solution

Sometimes the Check Engine Light illuminates because the computer detects misfires. Subaru released an improved spark plug wire set to solve the problem. The ignition coil should also be inspected for carbon tracks or short circuits between the contacts.

(8 people reported this problem)

Subaru Impreza WRX STI Vehicles With This Problem

RepairPal Fair Price Estimate
$193-$209
RepairPal Verified
Average mileage: 95,000 (95,000–95,000)
Engine affected: 2.5L 4 Cylinder Turbo
7 model years affected: 2004, 2005, 2006, 2007, more2008, 2009, 2010
Not Your Subaru Impreza WRX STI Problem?
Brake problem? Or maybe a faulty head gasket cylinder?
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Viewing 1-1 of 1 comments
I replaced all 4 spark plugs but still getting a misfire code for cylinder 1. Tried swapping the coil packs but still remains on cylinder 1.