2000 Ford Ranger Spark Plug

2000 FORD RANGER
135,000 MILES • 6 CYL • 4WD • AUTOMATIC
Avatar
LTMAGNUM
  • MEMBER
  • 1 POST
I recently changed spark plugs and found that one had no electrode in it. After replacing the truck ran great for about 3 days. Engine codes say it is running too rich and too lean. Bought new O2 sensors to replace but decided to check the plugs and found the same plug with the electrode missing again. What causes this on a plug?
Mar 4, 2008 at 11:30 PM
Advertisement
Avatar
SERVICE WRITER
  • ✓Experienced Mechanic
  • 9,123 POSTS
Start with checking the codes in the pcm. Sounds like a lean issue is happening that may have resulted from a coil pack or pcm problem (updated for spark knock on both), possibble o2 sensors as you mentioned, bad MAF or Dirty MAF.

Hopefully you aren't going through coolant. Excessive sprk knock will casue headgaskets to fail from excessive heat.
Mar 4, 2008 at 11:45 PM
Avatar
BLACKOP555
  • ✓Experienced Mechanic
  • 10,386 POSTS
Is the tip of the plug bent at all?

sounds like it could be excessive pressure and heat caused by spark knock, check your knock sensor to see if it is functioning then move onto o2 sensor related or a dirty MAF, IAT sensors.
Mar 4, 2008 at 11:55 PM
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle