bad maf?

[GsxEcutioner]

I dont have a CEL on or anything but I do get a hesitation everytime I hit boost. I sometimes see knock without boost and mostly every time at 4k + in boost. Sometimes it doesn't even happen. Mods are in my profile and are up to date, I also am running a chip currently for the injectors and maf since i had to ship the link chip back. let me know what you guys think. I just replaced the Knock sensor, and boost leak and leaked down = 150psi across the board and no leaking from valves and valves seals. I noticed that when my temps are normal its better but my 160 temp thermostat is not warming up at all.
-Shane

 

[dented_coffee]

Did you replace or inspect your coolant temp sensor? The ecu might be thinking that it still hasn't gotten past the cold start point yet.

 

[GsxEcutioner]

Coolant temp sensor is new from the stealership. But i logged it before and it would fluctuate from below 160-190 bu usually under 160.
-shane

 

[Killa_dsm]

I noticed that when my temps are normal its better but my 160 temp thermostat is not warming up at all.
-Shane

Then change it out for a hotter one.

 

[GsxEcutioner]

Thanks ryuto, i have a 180 im switching to tomorrow, i hope it helps.

Ok so the temp is way better but still hesitates under boost and it shows knock without boost and eih boost but full light bar, idk if its real knock though.
-shane

 

[GsxEcutioner]

Can Exhaust leaks cause Knock?

 

[GsxEcutioner]

Ok so I changed the MAF and it is a LOT better, I still get hesitation sometimes but not as much as before. I do see knock though and am not sure why, sometimes in boost, sometimes not in boost, sometimes it never happens, its a hit or miss, The knock sensor is new, I do hear a gasket leak though when I drive/Boost, either a exhaust or intake manifold gasket. not sure which one. can these cause knock?
-Shane

 

[GsxEcutioner]

resolved, the last 4k miles i have been driving with one intake valve not opening due to a fallen rocker. Tre3zy and KillaDSM fixed my problem tonight thinking i had to retorque the head and I saw the rocker. replaced and good to go.
-Shane