cured my lean pop now its a rich pig

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i dont get it.... friday night my car was running great!! i installed my AFPR and I turned it up to 43 psi, got a good pull with 12 counts and left my settings from -7--12... then sat night i was at the track and i fouled #2 plug so no more runs for me...

so this morning I got a new set of plugs BPR6ES's gapped them at .28 nd the car is running great except i can smell the fuel and i have 6 counts of knock... wtf? i wanted to grab a set of BPR7ES's but noone in town had them in stock, besides this would have made things worse since Im still on 93 octane...

correct me if I'm wrong but I think Im running my fuel pressure too high?

thanks in advance... btw my car is pretty much stock with a Walbrough 255,aeromotive afpr, and safc II at 16 PSI... im pulling 18 degrees with 12 counts and 24 degrees with 6 counts... it feels stronger and more responsive with the newer plugs but it shouldnt create that much difference in my A/F settings since the plugs even though they were fouled had less than 2000 miles on them should it?

 

[RoasT BeeF]

Were you running 6's or 7's the first time?

Stock FP for us is supposed to be 38psi I believe. I however got better results running 43 base FP. I also run the exact same AFPR and pump and my settings on AFC are about the same as yours BTW. weeiiiiird

 

[Below Ambient]

yeah i was running 38 PSI, but it was doing some mad lean popping in between 5-7k in third gear so i let off... i then adjusted it up to 43 psi and i almost lost it in first it had so much more low end so i kept it there only to foul a set of plugs...

i dunno, it runs great now, although i dont like wasting gas... i want it to burn... i'll see how well the 450's and the stock sidemount handle a small 16G and ill tune it then... i was just wondering if it was a AFPR tuning issue, or maybe the sign of a timing belt change....

 

[Deez]

Are you sure it was a lean pop that was occuring beforehand? ie. do you have a way to check the A/F ratio?

I'd also make sure that you don't have ANY boost leaks, period. I don't really see a 5 PSI increase in fuel pressure adding THAT much fuel... on my talon, changing the pressure 8 PSI changed the A/F roughly 0.4 points on the A/F side... YMMV

A word of advice on a 16G and the stock side mount.... I woudn't do it... you 'might' get one good pull out of it before it heatsoaks, then you lose the 'fun factor' of driving the car. Unless you run c-16 in your car like some people

 

[Below Ambient]

Are you sure it was a lean pop that was occuring beforehand? ie. do you have a way to check the A/F ratio?

I'd also make sure that you don't have ANY boost leaks, period. I don't really see a 5 PSI increase in fuel pressure adding THAT much fuel... on my talon, changing the pressure 8 PSI changed the A/F roughly 0.4 points on the A/F side... YMMV

A word of advice on a 16G and the stock side mount.... I woudn't do it... you 'might' get one good pull out of it before it heatsoaks, then you lose the 'fun factor' of driving the car. Unless you run c-16 in your car like some people

thanks rich... its actually a small 16g so it shouldnt be too bad... mine surprisingly doesnt heat soak as bad as i thought it did.... i get about three good pulls with my tune before it starts knocking and pulls back about 5-8 degrees