Engine runs lean on cyl. #3, pig rich on 1,2,&4
 

What are my options here? Pulled my plugs this morning after changing a few settings, and didn't like the way they looked. Added a bit more fuel in BRE (in 1% increments) that brought them up to a nice color, typical black soot in the wells, brownish porcelain, and a nice deep brown across the ground strap...all except for #3. Seems that no matter what I try it always stays around the same...bright white porcelain, some black soot in the well, and a light tan across the ground strap. I saw some flakes on the side of the plug as well, but they didn't really look like aluminum. Even so I don't want to take any chances. I tried fattening up the fuel again (even went so far as to turn the regulator up a few psi) and all it really seems to do is turn plugs 1,2, and 4 black (even the porcelain) and yet #3 still stays pretty much the same. I know it has to do with #3 having the least amount of coolant flow around it, but how can I get just #3 fattened up a bit? Does BRE have anything to control individual injector pulse, or could it just be a clogged up or sticking injector?

Re: Engine runs lean on cyl. #3, pig rich on 1,2,&4
 

If you've been playing with it some and have noticed no change it may be the injector. Switch it out with one from another cylinder and see what happens.

Re: Engine runs lean on cyl. #3, pig rich on 1,2,&4
 

It does change a little, but not as dramaticly as the others do. I just went to the auto parts store and ordered a set of ngk standard v-power plugs at 1 step colder and bumped my fpr up to 45psi at wot. The injector does open (you can here them quite well) and I had them cleaned and tested before I put them back in, so I don't really think that's the issue but I'm not going to rule it out.

Re: Engine runs lean on cyl. #3, pig rich on 1,2,&4
 

They're used injectors I'm assuming? 450's? What would you guess the AFR is at by looking at the plug on cyl #3 compared to the others? Is it way off or just a little bit maybe because of the coolant? Just a suggestion. like TorganFM said it could be a bad injector. I'd switch them around.

Re: Engine runs lean on cyl. #3, pig rich on 1,2,&4
 

my money is on the injector bro from what u posted

Re: Engine runs lean on cyl. #3, pig rich on 1,2,&4
 

I agree.

Re: Engine runs lean on cyl. #3, pig rich on 1,2,&4
 

Actually, injector is fine. All I needed to do was turn my fuel pressure up a hair and run a colder set of plugs. Issue taken care of.

Re: Engine runs lean on cyl. #3, pig rich on 1,2,&4
 

Dude your old school. I love it.

Re: Engine runs lean on cyl. #3, pig rich on 1,2,&4
 

Lol...I have no choice...don't really have enough money to afford a wideband at the moment. :-\