runs rich when its cold. not as bad as it used to be so im expecting to get 15 or 20k outa these, thats if there as good as or better than ngk. i now have a different wiring harness to try if i want so i should have a extra good computer, wire harness, motor and trans, well once i get the raptor fixed, anyways i was sorta waitin around for a 92 to put it in.

 

she is getting harder to start when cold. wont be long now. im at 133,483 now so about 9k miles in 13 months or about the same as the ngk maybe a little less.

 

Wow. I would have expected better from Iridium plugs. My coppers are at about 3500 miles now and still look as good as when I took them out of the box.

 

still goin, 134,280 miles

 

well plugs have about had it. 136,506 so 11k miles. not bad, i did push em more than i did the ngk. im hoping the extra spark from the ltcc will cut down on the rich at warmup.

 

any reason why you're running iridiums?

My motor and you're motor are worlds different and I change my plugs after every pass, but when I street drove my car, it NEVER had iridiums in it, I've heard nothing but bad things about them. Have you tried running a basic ngk tr55 or tr6 plug in your car?

 

tried standard plugs and they lasted a couple days. have not tried tr55s though. im having ecm problems now, think its a chip gone bad. playin musical ecms now, switchin memcals and ecms. so far got 1 ecm and 1 memcal to work without throwin the 51 code so now im tryin a pcmforless tune to see if the ltcc is not liking the tunes or the solomon tune went wack or doesnt like the ltcc

 

interesting, I know the ls1 guys run a tr55 at stock or bolt on power levels, might be something to consider trying? Especially at 1.95 a plug!! The tr6's most use until the 550whp range and beyond that it just depends on power adder, but anyways, the tune up in the car could definitely be fouling plugs out, do you have a wideband in it? Any chance of a datalogger?

 

this old brain dont like pc's and my mac dont do the program to datalog. im gona have to find me a old pc and have my daughter set it up for me so i just turn it on and do it. lol. i have froze up more pc's than i care to think about, lol. just a knack for pushing the wrong button. its only rich on warm up. at least thats how the exhaust smells. now im getting a right 02 code so it may be gone or wire short causing it.

 

I gotcha, it honestly seems like something in your tune-up is off. I'd get that straightened up and try a set of tr55/tr6 plugs, I think you'll be pleasantly surprised at how well they do, not to mention not having to spend all that money on iridiums!!!