SasaniFab
Proven Member
- 2,433
- 782
- Dec 1, 2013
-
Mexico,
Connecticut
un click maf compensation when running speed density
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un click maf compensation when running speed density[/QUOTEYou must be logged in to view this image or video.
Yes I do, a 3" GM maf with a translatorAre you running a maf correct?
you click that if your running speed densityYes I do, a 3" GM maf with a translator
Since I don't run speed density, isn't the maf compensation w/SD operation unused?
That's what I tought first and flush my system, refill at two other stations without changing the results. 91 is currently the highest rating avalaible here. I could get 94 but the closest station is around 330 miles awayYour on 91 octane? Can you get higher octane gas? Also maybe double check the gas your using. What if its not actually 91? Maybe throw some octane booster in there.
I get knock in any gear over 5k rpms..this is a new build large 16g turbo just to break it in with 650cc injectors tial blow off jmf intake ,Crower stage 2s. I can't find the single shop in Central Florida that can tune ecmlink and getting very frustrated if you guys know anybody that has experienced tuning ecmlink and Central Florida I'll pay them cash $50 an hour and compensate them for their drive if they live farther away.
So today I tried to perfectionate the tune, Mafcomp has now a smoother line, whitch didn't help
I raised afr from 11:1 to 10:1
This kind of helped, the car now runs at a higher rpm before knocking, again by a good amount
I must say, I'm out of ideas
Here's another log
I wouldn't rely on the dsm knock sensor for any reliable reading unless you're using a non stock ecu and can adjust the noise floor/ceiling. I also wouldn't zero out any timing retard degrees from your tune unless you're very familiar with what you're doing. Cliff notes: don't trust your knock sensor unless your car is 100% stock.
For reference i get similar results.
I have to pull timing to about 5DBTDC at an 11:1 at 5.5K
Were as i can triple timing if i aim at a 10:1
You cant trust gas unless you test it.
And at the end of the day, 10 is still better than OEM octane map anyway.
So if you cant find any viable solution currently, than just aim for 10, its a safe bet.
I apologize if you answered this already, you have a new knock sensor that is torqued correctly? Something doesn't add up.....You shouldn't be experiencing this type of behavior from the knock sensor. I have only experienced this type of symptom when my head gasket was leaking. You say that last year the car ran beautifully? What has changed since that time? Have you considered swapping out the injectors? You shouldn't have this much knock with your setup, your not making nearly enough power or boost. If i were you id put the stock injectors or a spare set and start over. What do your plugs look like? Like others have said , our knock sensor is a tiny microphone and isn't very sophisticated. Its probably something stupid.
You ever fix the issueThat's what I tought first and flush my system, refill at two other stations without changing the results. 91 is currently the highest rating avalaible here. I could get 94 but the closest station is around 330 miles away
You ever fix the issue
Thanks for the update....did you measure the endplay before removing the crank?Here's the situation right now
Being not able to find the source of the problem whatever the actions I took allong with peoples who knew more than myself, I've decided to open the engine after a quiet but prononced knock from the base of the motor was constantly appearing after the the car was fully warmed up. Not to say that it was losing/burning oil like crazy
The only obvious thing we saw was egg shaped cylinders, making the piston slaps.
Parts are on their way, until then I'll let everybody know of any progress
Thanks for the update....did you measure the endplay before removing the crank?
That's super weird, full engine rebuild and its in spec. Phantom knock?
I see you cleaned MAF and it's not running hot . Upload a new log. It's using 16/19 degrees when knock starts from your last log.