Rick's Free Auto Repair Advice

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 of compression. Ford wants you to do a running compression test and a cylinder leakdown test. Click here to see how that’s done. If the results show low compression, the only fix is to replace BOTH cylinder heads with the new redesigned heads now available from Ford. The repair costs may be covered by your warranty. Check with the dealer to make sure. This is a costly repair.

© 2012 Rick Muscoplat

Posted on by Rick Muscoplat

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