Here's a description of my situation. 2009 GT500 147,500+ miles. I have owned the car almost 2 years and put 33k+ miles on it since buying it. I am doing this on my phone so my mods won't show in my signature, but Gen2R. JLT 123, Lethal BAPS, Fomoco 52lbers, etc. Tuned by BJ. It put down 656 at the wheels just this past February on 93 but had some signs of detonation so he pulled a degree of timing out ( I believe). Did the Gen2R injectors, BAP'S etc. this winter and we changed the fuel filter at that time.
Here the last couple of weeks, it randomly will get real lean and run differently. Like not as smooth and refined. WOT the A/F will get into the mid 13's. This is not all the time, just randomly. It did it today going up 95 in Harford County. 6th gear 75-80mph part throttle where it is usually a/f 14's it was off the chart lean, give it more peddle, wouldn't go below 15's. Downshift to 5th and give it more peddle it gets to 13's but doesn't drop below 13's even at WOT so Iback out. Few minutes later, same situations, it does like its supposed to and when I really get on it, it drops down below 11 and you can obviously feel the difference.
Like it's not just the gauge reading wrong. You can certainly tell something isn't right.
A few minutes later simar situation and part throttle in 6th and we are at high 13's low 14's A/F. Roll a little more throttle and down in mid to low 12's downshift to 5th go WOT high 10's to mid 11's running right. Today this is all on full tank maybe 15 miles from gassing up. It's been randomly doing this tge last few weeks.
Here the last couple of weeks, it randomly will get real lean and run differently. Like not as smooth and refined. WOT the A/F will get into the mid 13's. This is not all the time, just randomly. It did it today going up 95 in Harford County. 6th gear 75-80mph part throttle where it is usually a/f 14's it was off the chart lean, give it more peddle, wouldn't go below 15's. Downshift to 5th and give it more peddle it gets to 13's but doesn't drop below 13's even at WOT so Iback out. Few minutes later, same situations, it does like its supposed to and when I really get on it, it drops down below 11 and you can obviously feel the difference.
Like it's not just the gauge reading wrong. You can certainly tell something isn't right.
A few minutes later simar situation and part throttle in 6th and we are at high 13's low 14's A/F. Roll a little more throttle and down in mid to low 12's downshift to 5th go WOT high 10's to mid 11's running right. Today this is all on full tank maybe 15 miles from gassing up. It's been randomly doing this tge last few weeks.
