I've heard that the original spark plugs that Ford used in the '98 Ford Ranger's engines with the 3.0 V-6 are too hot for these engines. I pulled mine out and they look like they are running just "a little on the hot side". I have an on going problem with my truck with pinging problems when running 87 or 89 octane fuel and have done a couple of things to make it better. The truck still pings but doesn't do it as bad as it used to. Can anyone tell me the proper spark plugs for this truck? Can you give me the part #'s for Motorcraft and for the Autolite #'s. I've read in a recent post for a spark plug, but it was for a FFV truck. Does this mean Flex Fuel Vehicle? "MY TRUCK IS NOT A FLEX FUEL VEHICLE". I'd appreciate if someone can give me the right spark plug #'s for my truck.

 

Look up current specifications at www.motorcaft.com

And, good God, please use the standard font from now on...

Also, look through the TSBs for your truck. Top of page, Recalls/TSBs, Full Text TSBs.

Steve

 

Thanks for the info. I recently went to the Motorcraft web-site and it said that you have to pay to veiw info. on the site. I'm not going to pay Ford for info. about my truck. This is why I posted the question in this forum. I am a new user to this web-site.

 

Punch ford motorcraft on search and you will find a site that is there's and you can get all the info you need. I just went there and it didn't cost me a thing good luck.

 

I just changed over to split fire plugs and am not having any problems at all. Just make sure that your plugs are gapped right and they should not run too hot.

 

As Ford specifies, the plug gap should be between .42 to .46 and I've gapped them in this range. Gapping them at .42 seems to make the truck run at it's best, but the plugs look like they are running a little on the hot side. I've read from a couple of different Ford forums that the plugs that Ford originally used were too hot for the engine and most people said to go with a plug that was two steps colder. I've also read that the original coil pack produces a weak spark and should be replaced with a new one. I've noticed that I'm not the only person that has this pinging problem. What works for some Rangers, doesn't always work for another Ranger. I guess this is a "Ford thing" as I've owned other vehicles that have never knocked or pinged no matter how many miles or what kind of 87 octane fuel that I have used. " Just trying to find the right answer".

 

HERE IS THE PART NUMBER

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AGSF32FM
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And if you want i'll sell them to ya. FTE $3.67 ea

Ed

 

What about colder spark plugs AGSF22FCM or AGSF22FM or AGSF22WM?

 

Just don't buy those Bosch rip offs with the four prongs!

 

If you have the correct spec plugs in your engine, they should not cause "pinging". Most problems with this symptom (as long as the plugs are in good shape) are related to carbon build up or engine running too hot . You might try running some "seafoam " through it, & make sure the engine is not running lean due to fuel delivery problem or air leaks. Some light pinging is nothing to get worried about, heavier pre-ignition IS something to get worried about, but even this should be counteracted by your knock sensor(s).
How many miles on the engine ?
I'm not sure if you have the Vulcan 3L engine in your truck but if so I have those MC plugs & dont get any pinging whatsoever. So you may well have to look elsewhere for the problem.