i have a 95 3.8 cougar, now which ones are the step colder spark plugs for my car, im going to order them from 5star ford but i need to know which ones, and also whats the gain on using these???? are they the Motorcraft awsf32pp???? or the 22c's?????
you can install them but you will run rich, and if you run them too long, you'll foul the plugs and have to do it over again anyway. I'd say shorter than a week or less than 300 miles and you'll be OK.
colder plugs are recommended when your running with advanced timing...it prevents pinging...a step colder are pn awsf--32c...two steps is awsf-42c...go with copper plugs...no platinum! i was running 2 step colder platinums and i recently switched to one step colder coppers...i actually felt an improvement in performance....i switched to one step colder because my idle was a little rough when cold with the 2 step colder
First off, we are talking about a 3.8L V-6, not the modular 4.6L V-8.
Second, stock plugs for the 3.8L V-6 in 1996-1997 were AWSF-44PP. The stock plugs for 49 state 3.8L '94-'95 T-Bird/Cougar were AWSF-44C. For CA cars, it was AWSF-44PP.
So to drop one heat range colder, you would need AWSF-34C or AWSF-34PP. To drop two heat ranges colder, you would need AWSF-24C or PP. Now from what others have told me (read: I do not own an SC) you can install AGSF-12 FM1 plugs in an SC. So I would assume they can work in a n/a 3.6L V-6 as well. That also means that AWSFA-12C' would work. However this would drop you three heat ranges colder or more. I do not recommend this.
I would go with AWSF-34C for your cars and be done with it.
Jim,
"a step colder are pn awsf--32c...two steps is awsf-42c...go with copper plugs...no platinum" Your thinking is backwards. The higher the number, the hotter the Motorcraft plug is in heat ranges.
"The higher the number, the hotter the Motorcraft plug is in heat ranges. "
exactly...isnt that what i said? 32c is one step colder...22c is two steps colder...i know stock is 44c in the 3.8...i am using 32c's now and the car runs fine with them...this is what alberto and pete told me to use...what is the difference between 34c and 32c? i will admit by the way that i dont know all that much about spark plugs but i do now how to change them, gap them, and know that the plugs in my car work fine...
""a step colder are pn awsf--32c...two steps is awsf-42c...go with copper plugs...no platinum"
A step COLDER are p.n. AWSF-32C...TWO steps (colder?) is AWSF-42C. If so, you are incorrect. The higher the number...the hotter the Motorcraft heat range. The lower the number, the colder.
oooooooooooooooooooooh...i see...what a di#k i am...yeah that was a mistake when i wrote it the first time...so anyway...what is the difference between 44C and 42C...
Wow, what an excellent article. It seems AWFS-22C is the best choice for sparkplugs for the 4.6 engine.
Is there any place one can buy these things online? Or does Autozone carry them? Are the 'equivalent' partnos from other brands that are the same plug as the Motorcraft? Or is Motorcraft the only way to go?
There is no need to buy any other brand of sparkplug except motorcraft/autolite. And motorcraft/autolite are the same plug, so there is only one spark plug for your car.
Bosch and the others are a waste of money on these cars period.
JH
Leto said:
Maybe someone could post an equivalency chart of Motorcraft / Autolite / Bosch / others?
I've pretty much given up on Autolite and Motorcraft. Bosch wouldn't go in my lawn mower...
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