Can you give me like a quick list of all the "MUST LOG" items? I assume its a stock map sensor. and again, still new to all this so not sure what everything means like 1 byte. i just have a aem afr gauge. i think i need to buy the uego wideband sensor which is additional, right?

what could be causing the knock?

i know.. i have a ton of learning ahead of me.

 

IMO, Must log: TPS, RPM, Load (The best one you can), Timing advance, Boost (4-Bar map sensor like Omnipower), AFR (figure out how to log your AEM), knock count, knock voltage, IPW, Injector duty cycle. If you are doing ECU controlled boost then Waistgate duty cycle and WGDC correction. These are the things i would be logging during a power pull. Other things can be logged for various other activities i.e. you don't even have to start the engine to grab what the LTFT's are if you have been driving a while since the last ecu reset. The more stuff you log the slower the logging so during power pulls you wanna keep it to the essentials for what your doing.


As far as knock is concerned without a more complete log its hard to say. You could be running too lean/rich or there could be issues with your timing, or maybe some other misc. issue like harsh jumps in your fuel or timing map.

 

Thanks a ton. So i will set it to log all of those things and uncheck everything else. Yes i am on ecu controlled boost.

Its just so weird. 1 week ago the car was absolutely perfect. All of the sudden this is happening? Something has had to have failed. Could a fuel pump failure cause these symptoms?

 

It could be fuel system related, its one of the reasons i asked about your trims. I would verify the vacuum line to the regulator didn't pop off and that everything looks ok visually. Make sure none of the other hoses on the intake may have popped off. Ultimately it might be the pump but i would eliminate all the easy stuff before digging into that.

 

Sent my tuner that log and he said to bring him the car as soon as i can. So making a trip next wednesday. Will update once i find the problem

Thanks for the help though! I did switch all my default log settings in evoscan. Looks like the only Load i'll be able to log for now is "LoadCalculated"

 

Guys is this hose supposed to be hanging like this...? Prob not my problem but surely it isn't supposed to be like this.

 

Normally that line is supposed to be connected. This would cause a bad boost leak.

Did you have the EGR deleted?

 

I do not. Where does this hose connect? It's only ~3-4" long and i don't see anything that it connects to

 

 

The hose seems to be connected to the EGR valve. I would double check connections related to that first.

 

that hose connects into another hose behind/under the throttle body. Throw some zip ties on it to help hold it together in the future.

 

Hose is connected and zip ties on it. Hopefully won't happen again.

However i'm pretty sure the issue is still there. although I'm scared to really get into full boost again and find out.

 

Just want to go over all the symptoms I'm getting:

-On cold startup, fires up, idles fine for about 4 seconds then drops down and turns off (unless I tap the gas). After about 30 seconds of that it will stay on fine

-AFRs are lean at idle and wot but normal at cruise speeds.

-When it's lean idling its loping a lot more than usual. (Normally only lopes when decelling after a wot pull)

-noticed it boosting more than it should be on one pull. (Tuned at 29psi, hit 31psi)

 

Hmm maybe check the wiring at the fuel pump resistor on the firewall. If you have a multimeter pull the harness plug off and check the resistance across the resistor.

 

Your cold start up description sounds like what happens when unmetered air is getting in. Maybe there's another hose off or a boost leak.