I have the 11500TFC, its been great no problems. Just change the spark plug to NGK.
like NGK for plugs and wires on my car.
Buy the spark plugs, NGK brand, off of RockAuto.
Ngk plugs would be perfectly fine but there's nothing wrong with motorcrafts either.
After taking out the plugs they were brown all 4 cyls I replaced them with NGK lasers and wow my car was so much more responsive and it would ride through every gear through high rpm without power cuts or jittering.
If you are having misfires under load, the first check is always ignition, i.e. spark plugs and coils (only factory coils and factory or NGK plugs in my experience).
Problem solved: I got a internally bad ac delco spark plug. Gap and everything was correct no cracks I could see literally just a bad plug.
95K, swapped for NGK laser iridium’s (OEM replacement) plugs and since then have had rough idle but when driving feels fine.
I got 2 cheap sets of these online for a Honda idsi engine (8 iridium plugs required) they turned out to be fake and were burned out in 6 weeks causing it to misfire badly.
Problem solved: I got a internally bad ac delco spark plug. Gap and everything was correct no cracks I could see literally just a bad plug.
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