4.8 224/230 cam tuning surging and knock retard

[chihuas0777]

just got this 224/230 .553/.553 109+0 cam put in my 00 silverado. tried tuning it for idle, followed a guide that was posted here by rinkrat456 and it turns on good without giving it gas or nothing but it does say that i get around 8* of KR and i was very worried, tried taking it around the block and every time i would slow down for a stop and pressed the clutch in the truck would shoot the rpms up and slowly lower them.
the truck is manual and i honestly just cammed it for the mean idle im not really looking to race it or none of that just want a nice sounding truck but i cant even get it there.
if anyone could help me out i would really appreciate it4.8 cammed base tune.hptcammed 4.8 log.hpl

[Hondaeater]

You better fix that lean fueling! Multiply the Primary & Secondary VE by 1.5 from 15-105kPa and 400-1200rpm to start and to protect the engine.
The Underspeed table is set to +10* even when there is 0rpm error. 0 error should = 0* and set the values from -25 = 1.5* to -100 rpm = 8* and interpolate. You can put the lopey timing back in after the idle and fuel is corrected. 0 error should always be 0* correction.
Here is a good set of channels to log.
Your Hi and Low octane Advance should be set closer to idle spark (15-18*) in gear from 400- 1200rpm and below from about 0.36 g/s to 0.08 g/s

[Hondaeater]

Put at least 0.5 in the startup airflow decay lol. And set off-idle scalar to 1.00 not 0, set delay to 0 so it starts and begins removing the added startup airflow.
If you are tuning this yourself you need to watch and research more.

[chihuas0777]

started messing with the truck again with a little more knowledge, im still getting alot of knock retard & misfires, i have the timing stupid low so im lost on what to do next, i attached a small log hopefully thats enough for some input, thanks in advance

[reubone]

cammed 4.8try.hpt
Changed your misfire tables and disabled burst knock. I believe this is the issue.

[chihuas0777]

loaded up the tune you sent me, it seems like it got better but it still knocks when i drive it, i got a pretty long log this time see if that helps, i havent changed anything else on the tune i feel like the timing is already pretty low but then again im not sure

[reubone]

Wowzers! Ok, I see your fuel trims are way outta whack. This much knock could be from a really lean condition or terrible gas or it could be noise. Try to get your fueling under control by checking for exhaust/intake leaks or weak injectors.

[chihuas0777]

i hooked up a wideband and started dialing in the ve table, i also tried desensitizing the knock sensors and taking away 5* of timing but it still gives me some knock, im hoping its just noise but i dont know, any help to point me in the right direction would really be appreciated.

[Hondaeater]

If your fuel trims are accurate or at least close, then get some high octane fuel and/or add an octane booster. See if that helps.
How old is the gas? If it's been in there months, I would drain and replace gas with high octane. You already dropped the timing right? That should help figure out if it's noise.

[Russ K]

Check for knock sensor DTC's. A knock sensor code will show false knock.

Russ Kemp

[Fast4.7]

Check for knock sensor DTC's. A knock sensor code will show false knock.

Russ Kemp

I have seen a bad knock sensor not set a failure code for a while as well, yet max out on false knock retard as soon as the PCM enables it off-idle.