ECMlink Cant get rid of knock!!!

[RacethisTSI]

I dont know what to try anymore. dsmlink.... Ive done everything i can think of and my knock count is still reading about 13 counts at wot everytime. im run a 12 to 12.5/1 air fuel(i didnt think that was too bad), but when i go to wot i get a timing pull, so i tryed advancing timing, took it all the way up to 12 degrees and no change, my airflow is set fine and i dont know what else to try, im running 20 lbs and flowing about 32 lb/minute.. my injector dutys are never hitting 100 percent so i dont think that could be a problem eather anyone have any ideas

 

[92awddsm]

I dont know what to try anymore. dsmlink.... Ive done everything i can think of and my knock count is still reading about 13 counts at wot everytime. im run a 12 to 12.5/1 air fuel(i didnt think that was too bad), but when i go to wot i get a timing pull, so i tryed advancing timing, took it all the way up to 12 degrees and no change, my airflow is set fine and i dont know what else to try, im running 20 lbs and flowing about 32 lb/minute.. my injector dutys are never hitting 100 percent so i dont think that could be a problem eather anyone have any ideas

First, try adding some fuel. 12-12.5/1 a/f ration is a little on the lean side. You should tune for 11.5-11.8/1 a/f ratio.

Next, quit trying to advance the timing. If you are getting knock, advancing the timing is just going to make it worse.

You seem to be tuning in the totally opposite direction than what you should be going.

 

[RacethisTSI]

i thought when you puled timing it was a bad thing....thats why i waas advancing it...i thought tht you never wanted to see timeing go negative....but thank you for setting me strait ill try that and get back to you

 

[rsr93]

try it a little richer and see what happens. and put your timing back

what kina pump are you running 91 93 ??

 

[RacethisTSI]

walbro 255 on 94 octain

 

[IllEagl]

Do you have a wideband? or are you going off of the estimate? On pump most people shoot for 11-11.5:1. Richen it up and set the timing back to stock and see what happens.

 

[RacethisTSI]

no i have a wide band

 

[IllEagl]

Like I said, I would zero out the timing, richen it up to about 11:1 and start over.

 

[94Jettameowpsst]

Every car's different...idk, i get where you're comin from when it comes to advancing the cas cause for some reason when i did that to mine, knock went from 14 counts to redline to 4.....weird.
But yea, richen it up, you are kinda lean.
Edit: When you advanced your timing, was there any change in your knock? If not, its a good possibility you could have a bad cas or one thats on its way out.

 

[RacethisTSI]

i hope not..the cas only has 3000 miles on it...bought it brand new when i built the motor

 

[RacethisTSI]

richend it up...ran about a 11.9 :1 ratio....went out..did a pull in second...car went fine, went to third and i blew my intercooler pipe off...damn thing, anyways...i sat on the side of the road for a sec and looked at my log...same knock...12.7, i limped the car home...start it, go and then i would bog down... huge boost leak... so i get home put the pipe back on....tightend my connection to my cas...they came loose and tryed to start the car, my computer was not getting any power so i check the fuse box and i blew the 20a blue engine fuse...just for the record i blew this yesterday too...so my question now is...can a bad conection to the CAS cause knock????....im hoping i blew the fuse because of a short when i was fixing wires

 

[94Jettameowpsst]

Your cas controls your base timing and spark i do believe. If its got a bad connection it will throw EVERYTHING off. Was just thinking, you could have a bad knock sensor as well or a bad connection somewhere else as well. Its hard to diagnose a problem like this without actually seeing/riding in the car Im tryin here

 

[IllEagl]

does the car idle and cruise good? if so its prob not the cas...have you checked base timing? is the knock sensor on tight?

 

[RacethisTSI]

probably a stupid question..but how do i check base timing?..also joe i have thought if the knock censor might be bad...because im also getting partial throttle knock, il check to see if all the connections for the knock and cas are tight and the censer it self..and yes the car idals and cruses fine...but what causes the fuse to blow?

 

[andytalon]

Well there ya go you NEED to set your base timing with a timing light, heh kinda funny
http://www.vfaq.com/index-main.html

There ya go, if you need any help with doing timing with the timing light pm me I will gladly help you! Good luck its very easy.

 

[RacethisTSI]

thank you andy..ill try that tommorw

 

[RacethisTSI]

base timing is fine....just checked it...but the car is getting worse....i falled out all my spark plugs ...so i went and bought new ngks, gapped them put them in and the car ran better. Took it out for a drive..it felt good went through 1st and 2nd with great poewr..got to third and it felt like somone put the e brake on...the car just wouldnt go..after that i coasted and pop pop pop bam..just alto of detonation..so i put it in nuteral and coasted home.... anyone have any ideas?

 

[IllEagl]

what air/fuel ratio are you running now?

 

[RacethisTSI]

right around 12:1 yeah i thought maybe that was the problem too, but i dont know...the good news i guess is that after i put the new plugs in all i saw was a top of 7 counts of knock...on my way there....but i think im running a little rish..when i took the plugs out they were covered in gas and the cylinders were soaked....i guess this is what ou first get when trying to tune with dsmlink....

 

[kottyking]

probably a stupid question..but how do i check base timing?..also joe i have thought if the knock censor might be bad...because im also getting partial throttle knock, il check to see if all the connections for the knock and cas are tight and the censer it self..and yes the car idals and cruses fine...but what causes the fuse to blow?

No offense but you probably shouldnt be tuning your car if your asking this question. Take it to a reputable shop w/ a dyno and they show you a thing or too.

 

[RacethisTSI]

i was being sarcastic about the whole base timing thing..im sorry

 

[kottyking]

I'm sure your dsm didn't find it humoruos.......................... jk and good luck. Knock is a bi***.

 

[Stratus]

You should richen it up to 11.0-11.5:1 on pump gas, like someone said earlier. 12.0-12.5 is usually what you shoot for on race gas. What are your timing sliders set at? You should be pulling timing at whatever RPMs your knocking at. If you can't get the knock to stop by richening it up and pulling timing then you need higher octane gas or you need to lower the boost.

I don't see how your fouling plugs at 12.5:1. Are you misfiring? What plug wiires are you running? I've ran my car as rich as 10.0 without fouling plugs and seeing as 12.5 is alot leaner, it would lead me to believe you have another issue if your plugs are covered in gas(such as no spark/misfire).

Also, the reason your car felt like someone put on the ebrake is because your ecu is pulling timing from all that knock.

 

[RacethisTSI]

i ahve no idea...well when i did the pull heres what happened...started in first went wot, got about a top knock of 1, second the car still pulled strong timing took a nose dive at 3500 rpm and i got 8 counts of knock..this however is less then the 12 i was getting so thats good, then i hit third...about 4 counts of knock but no power what so ever...it almost felt like the motor was flooding itself..im going to try some race gas tommorw and ill let you guys know what happens...

 

[IllEagl]

You should richen it up to 11.0-11.5:1 on pump gas, like someone said earlier. 12.0-12.5 is usually what you shoot for on race gas. What are your timing sliders set at? You should be pulling timing at whatever RPMs your knocking at. If you can't get the knock to stop by richening it up and pulling timing then you need higher octane gas or you need to lower the boost.


Also, the reason your car felt like some put on the ebrake is because your ecu is pulling timing from all that knock.

Exactly what Im trying to tell him, but he doesnt want to listen...maybe when he throws a rod out the side of his block or melts a piston...