Rick's Free Auto Repair Advice

Posts Tagged: P0306

Diagnose misfires

Diagnose misfires If you own a vehicle with coil packs and spark plug wires and have any of these trouble codes P0300 – Random/Multiple Cylinder Misfire Detected, P0301 – Cylinder 1 Misfire Detected, P0302 – Cylinder 2 Misfire Detected, P0303 – Cylinder 3 Misfire Detected, P0304 – Cylinder 4 Misfire Detected, P0305 – Cylinder 5 Misfire Detected, P0306 – Cylinder 6 Misfire Detected, P0307 – Cylinder 7 Misfire Detected, P0308 – Cylinder 8 Misfire Detected, P0309 – Cylinder 9 Misfire Detected, P0310 – Cylinder 10 Misfire Detected, P0311 – Cylinder … Read More

Engine Runs Rough

Engine Runs Rough If you find any of these trouble codes P0300, P0301, P0302, P0303, P0304, P0305, P0306, read this. Here’s how to diagnose engine runs rough after going through a puddle on any of these vehicles: 2008-2009 Chevrolet Colorado, TrailBlazer, 2008-2009 GMC Canyon, Envoy, 2008-2009 HUMMER H3, H3T, 2008-2009 Saab 9-7X, All Equipped With Engine RPOs LLR, LLV, LL8, here’s what to check out. The ignition coil bolts on these vehicles is vented. If you drive through puddles and water splashes onto the bolt vent holes, the water will … Read More

P0300 P0301 P0302 P0303 P0304 P0305 P0306 P0307 P0308 P0309 P0310 P0311 P0312

Fix code P0300 P0301 P0302 P0303 P0304 P0305 P0306 P0307 P0308 P0309 P0310 P0311 P0312 Pinpointing cylinder misfire codes People ask me about misfire codes after they’ve replaced all the spark plug wires, coil, and plugs and they still have the code. Here’s a quick explanation of how a pro would attack the problem. First, if you’re getting a P0300 Random/Multiple Cylinder Misfire Detected code, that would indicate a universal problem that applies to all cylinders. In that case, start by checking fuel supply issues like poor fuel pressure caused … Read More

Ford Ranger Misfire Codes

Fix Ford Ranger Misfire Codes  P0300, P0301, P0302, P0303, P0304, P0305, P0306, and P0316 You’re not going to be a happy camper when you’re done reading this post. Ford has issued a TSB #05-26-3 that describes a fairly significant design problem with the cylinder heads on 2004-06 Rangers with the 3.0 overhead valve “Vulcan” engine. The problem shows up as any of these misfire codes P0300, P0301, P0302, P0303, P0304, P0305, P0306, and P0316. The TSB states that the cause may be an exhaust valve “recession” that causes a loss … Read More


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