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I don't know much, but it looks like the spike is during a wot shift. maybe your hitting fuel cut

I cant see what your actual AFR is under WOT but your Commanded AFR is 12.08, which in my opinion is really rich for a naturally aspirated 5.3, 13.5 is probably best. I guess you have tried pulling...

oh and it idles around 800rpm. your ls3 has a bigger cam than mine so im sure you will need to bump your idle up a couple hundred rpm.

well im not sure what vehicle and pcm you have but I put a ls376/480 into my 04 Silverado and im running the stock 04 Silverado pcm. my truck runs great and is my everyday driver, it has alittle...

attached is my old tune for my 5.3- tsp 224/224 .581-.581 112lsa cam, precision race components .625 beehives, bbk 80mm throttle body, slp cai, pacesetter long tubes, 3in. trans is built to hold...

post a tune and log. also you could just run maf only

well as I stated before the tune you posted is a virtually unmodified 5.3 tune. make sure your not using long term fuel trims. last ditch effort to get it to idle would be to go to stall saver under...

or run MAF....or both

I would check all my wiring from ign and ecm to trans.

if your running abnormally rich then reduce fuel. and if I understand the second part of your question basically if you pump your piston fully and slowly you create a little air, if you pump your...

this is from alldata. under a 07 2500 Silverado with either a 60-65 or a 4l70e. im sure it carries over to another year or two and trans or two

Circuit Description

The pressure control (PC) solenoid valve is an electronic device that regulates transmission line pressure based on the current flow through its coil winding. The magnetic...

Circuit Description

The torque converter clutch pulse width modulation (TCC PWM) solenoid valve controls the fluid acting on the converter clutch valve. The converter clutch valve controls the...

any info on the vehicle???? im guessing you have a truck that previously had a 5.3 in it and now has a 6.0. I took a little time to compare your tune file with one I had for my 04 5.3l. if you do...

as far as I know, if you keep the 1 bar(15psi) map then you will be limited in overall boost you can tune for. when in boost you can easily go over the pressure ratings for the 1 bar sensor, in other...

sorry I should have put more info down. I have the engine running pretty good on maf. ve needs to be dialed in. I have a lingefelter crank trigger converter. I could have also put the 5.3 reluctor...

or get a higher pressure map sensor

so I just downloaded 2.24 because its the newest version and I just so happened to swap my blown up 04 Silverado 5.3 with a new gmpp crate ls376/480. so will it allow me to select 6.2 for engine...

ive never tuned a turbo vehicle but I see that your injector duty is logging over 100% and judging by your stft you are running a little lean. you should log another run recording wideband data. if...

4129441295should I need to change my closed loop proportional tables? I keep looking at my chart display and not only is my afr all over the place but It looks like my o2s may need replaced or...

yea I believe some early 04 5.3 had returns but by the end of 04 they all went return less I believe.

ok thanks...tomorrow night I will post the new 6.0 ve log and tune. again thank you

can I swap to the most recent tune you gave me for ve tuning and them combine my current maf tune with it? or should I stay with the first edits you provided?

tonights maf log...btw I am still running off of the first maf tune file mechanicman sent me but with adjustments in maf and diag and spark and a few others. 4118141182

now now you two. I think im on the right track now. I will post another log tonight. the lugging I was feeling was spark related. I added about 10 more degrees all over and now she is running pretty...