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This one sucks and looks to be difficult to get out of unless there is a check sum editor/writer available. I imagine there will be a ton of disputes with 50 state legal handheld tuners as well. But...

Thanks 5FDP for catching that. I'll make the changes to burst knock, timing etc and take it for another drive.

Appreciate the help!

Hi,

I've read through Ed Mowton's Guide and made my first attempt at tuning from scratch.

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For my Scanner File - I had issues with my AEM Serial and the AFR Error Graph so I...

Hi,

I added commanded EQ, which popped up on the graph.


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I still am having issues having my wideband turn up on the graph along with the EQ Error. Any input as to what I'm doing...

Hi,

I'm having issues with my AFR Error graph showing the wrong % error. The AFR commanded is in AFR units, however my AEM WB will show in lambda. This is throwing off my AFR to assist with OL MAF...

I'm having a issue with my Scanner not displaying AFR Error. I haven't attempted to tune in OL yet since the data isn't accurate. It's reading as a 92.3% error. All signs point to it being operator...

Appreciate it! I'll switch it back and try my hand at OL tuning.

Sorry 5FDP, probably should have lead with that.

2005 Silverado

408 Stroker ~10.5:1 comp (Originally a 5.3/4L60 truck)
CNC'd 243 Heads
236/242 0.601/0.605 112+2 Comp Cam
New Bosch OEM 42lb...

Hi, I was hoping for feedback on the tune/scan. I had a quick WOT section, but WB was showing 0.90 lambda. Thought I heard pining so I backed out of it.


I've started to read through ED Mowton's...

Thanks for the info, all the info you posted points to the decapped injectors being the likely culprit - as everyone here has already said.;) The plan is to still have them sent to be flow tested to...

Fair enough and you are right. Problem is I don't have the ability to put my hands on the data from the builds to verify anything which is very frustrating. Asking around to see if anyone has been in...

Heads were skimmed to clean the surface and rebuilt by the shop. Block wasn't decked to my knowledge. Builder doesn't have a build sheet to confirm the head information or the block info though.
...

Appreciate the input 5FDP.

When reviewing the tune from the mail order tuner I noticed that the displacement was off but after the feedback from the tuner that it looked good I went with it. Other...

Hi all,

Having issues with either the engine builder or the tune

Engine Specs:
408 Stroker
243 heads - CNC'd
Decapped injectors - Benched to ~78lbs
234/242 .601/.605 112+2 Cam