whats the best spark plugs
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Senior Member
Joined: Oct 2003
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From: bremerton wa
whats the best spark plugs
I have a 98 F150 xlt supercab 4x4 4.6ltr with about 117K miles
hypertech programmer,3" single exhaust all the way with a V-FORCE muff, K&N filter in stock intake. I just had the knock sencor replaced. top half of engine (block up) cleaned and parts replaced. she still knock's at high rpm's. I use chevron techron gas, its worse if I use cheap gas. what else would make the engine knock. (ping) same sound if one to use cheap gas. is it time to replace spark plugs? plugs & wires are about 2 yrs old.
truck also replaced: is alternator, water pump, both exhaust sencors(lean)
2 question: why does enging knock? (always had this problem). 4.6ltr why does truck wanna die at comming to a stop? ( just started doing that).
hypertech programmer,3" single exhaust all the way with a V-FORCE muff, K&N filter in stock intake. I just had the knock sencor replaced. top half of engine (block up) cleaned and parts replaced. she still knock's at high rpm's. I use chevron techron gas, its worse if I use cheap gas. what else would make the engine knock. (ping) same sound if one to use cheap gas. is it time to replace spark plugs? plugs & wires are about 2 yrs old.
truck also replaced: is alternator, water pump, both exhaust sencors(lean)
2 question: why does enging knock? (always had this problem). 4.6ltr why does truck wanna die at comming to a stop? ( just started doing that).
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Joined: Sep 2005
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From: Atlanta, GA
It could die coming to a stop for several reasons, a couple of which being it needs plugs, or the IAC valve is on its death bed. I have a Excursion V10 I am working on right now that was stalling at idle, and after a quick overview the plugs had no tips on them anymore, after 129000 miles. (gee imagine that)
The knocking could be related to your program. Deprogram it and see if it still knocks. Overly advanced ignition timing on old 5.0's would cause a knock and ping. Try adding a can of octane booster to the tank once or twice if it still knocks. And try another gas station as well.
As for plugs, you can buy whatever you want, you'll never notice a change in performance unless you have a higher HP setup. Just regular old platinum plugs will get the job done, and be the least expensive of your options
The knocking could be related to your program. Deprogram it and see if it still knocks. Overly advanced ignition timing on old 5.0's would cause a knock and ping. Try adding a can of octane booster to the tank once or twice if it still knocks. And try another gas station as well.
As for plugs, you can buy whatever you want, you'll never notice a change in performance unless you have a higher HP setup. Just regular old platinum plugs will get the job done, and be the least expensive of your options
Thread Starter
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Senior Member
Joined: Oct 2003
Posts: 146
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From: bremerton wa
thanks
thanks for your advice i will replace the iac valve and go from there.
Originally Posted by 98Navi
It could die coming to a stop for several reasons, a couple of which being it needs plugs, or the IAC valve is on its death bed. I have a Excursion V10 I am working on right now that was stalling at idle, and after a quick overview the plugs had no tips on them anymore, after 129000 miles. (gee imagine that)
The knocking could be related to your program. Deprogram it and see if it still knocks. Overly advanced ignition timing on old 5.0's would cause a knock and ping. Try adding a can of octane booster to the tank once or twice if it still knocks. And try another gas station as well.
As for plugs, you can buy whatever you want, you'll never notice a change in performance unless you have a higher HP setup. Just regular old platinum plugs will get the job done, and be the least expensive of your options
The knocking could be related to your program. Deprogram it and see if it still knocks. Overly advanced ignition timing on old 5.0's would cause a knock and ping. Try adding a can of octane booster to the tank once or twice if it still knocks. And try another gas station as well.
As for plugs, you can buy whatever you want, you'll never notice a change in performance unless you have a higher HP setup. Just regular old platinum plugs will get the job done, and be the least expensive of your options