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yeah i've got an 87 fc here, ive been around the community for a while...bought the msp new in 03 but havent been here in so long i had to get another screen name. i figured i could post this question here since the p5 and msp are pretty much identical excluding the forced induction part of it...

well i posted the same question a few weeks ago and got no help so here's another shot. as soon as the car swithes into open loop under wot the af goes straight lean, and if i stay there for a second longer you can hear it detonating, or ping...which ever the two is caused by lean combustion...

well i posted the same question a few weeks ago in the msp forum and got no help so here's another shot, i thought i might find some wiser folk in here???? as soon as the car switches into open loop under wot the af goes straight lean, and if i stay there for a second longer you can hear it...

i thin khe maybe but its def not what i have...

well i give up, im just going to run the b**** into the ground...(burnout)

are we all out of ideas here, cause i dont know what to do? lets just pretend i had a wide band and it read the same way, what would you be trying to do next to figure out why this thing is leaning out? would getting fuel control be though way to do it?

i have to believe something is wrong if for all this time it was reading correctly and now its leaning out with associated pinging, thast a little to hard to ignore i think?

i have been using a narrow band autometer for about 40,000 miles now and it has read consistanly the same the whole time unitll recently. i only heard the ping once and that was a couple of days ago when i wanted to see how the car reacted at wot for a longer duration. id have to say it was...

damn (pissed)

i also noticed today some associated pinging or detonation, i cant remember the difference between the two, but i know what of them pertains to an extremly lean condition. i just cant figure out why this isonly occuring at wot. i would think if the coils were ****** it would be lean all the time?

any word? just fyi, i tend to run about 10psi in the warmer months and stock in the cooler. i had an fcd after i first bought the car new but 32 degrees+10psi= stupid fast and probably a little too risky ie. i liked it a little too much so i got rid of it. but now im just cold air, type s on...

right on dude. yeah my bad i keep forgetting they deleted my old screen name cause its been a long time since ive been around here, and i havent gotten around to doing my sig. it is an msp though.

that cant be good. i wonder how i could pin point that exactly, and how much a new set off coils would be?

my first thought was maybe i had the wrong plugs in there, so i just changed them out with the zfr7f-11's and still the same...as soon as i go to WOT in any gear the a/f goes all the way lean and i cant understand what is causing it to do this??? anyone have any suggestions??