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Old 06-19-2010, 04:27 PM
snatiep snatiep is offline
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Posts: 41
Question Spark Knock problem???

Hello Everyone!

Recently my check engine light came on and one of the coil packs had to be replaced. I went to the junk yard and got 2 "new" coil packs and my truck runs and idles like a champ.

It does have a minor spark knock when the truck is in overdrive, floored, and going up a hill. I replaced the plugs with new Motorcraft plugs and Autolite Wires. It still pings. I went and got some colder Autolite 103 plugs and it still pings a bit.

My question......could it be the old coil packs I put in?

I have ran 3/4 can of Seafoam through the main vacuum line and it smoked like CRAZY!!

I wonder if the pinging is coming from carbon buildup?

One strange thing......sometimes when floored it won't ping at all. I'm not sure what the problem is?

Do these truck tend to ping a little when under heavy acceleration?

My truck has 128,000 miles on it.

I thank you for your thoughts!

There is no check engine light currently on.
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1996 Ford Ranger
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5 speed manual transmission

Last edited by snatiep; 06-19-2010 at 05:03 PM.
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  #2  
Old 06-29-2010, 05:31 PM
skyhigh97 skyhigh97 is offline
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Posts: 11
Default Re: Spark Knock problem???

mine does tha same thing but what i would try is running a fresh tank of 93 or 97 octane and then see if it does that if it still does that check ur timing also check ur plug wires that was my problem tha onwer before me didnt kno what he was doing and rearranged all tha plug wires on tha secondary coil
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Old 07-27-2010, 02:38 PM
ranger5572 ranger5572 is offline
2004 XLT with a few mods
 
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Default Re: Spark Knock problem???

My '90 was like that with 125,000mi. i had to follow semi's uphill on the highway to maintain 65mph. It was a 2.3L. It was worn out but still the best truck on the road. That truck is why I still drive a Ranger (which started chattering a bit yesterday).
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