Knock is back?!?!

[Shimy87]

Got this resolved last year with some parts replacement and tuning. Get her back out this spring and the dam thing is knocking again!!! Will check fuel pressure is rising appropriately first, O2 is about 800 and boost is only 15 lbs. can't turn boost any lower as rod has no tension now when placed on arm. Any advice would be greatly appreciated!

[Steve Wood]

so, what's the pattern...star ts at the top of third gear and gets worse each frame?

Happens in low gear, or on the shift to second?  Starts with a low number and gets worse each frame?  Starts high and gets less each frame until it goes away?

give us the amplitude of numbers along with the pattern

[Shimy87]

Starts in first, about 100 yards out of the hole. Alarm goes off, SM shows 5 to 7 for knock as I lift.

[Steve Wood]

is that on the shift to second?

if you got wot in third gear about sixty mph, does it do it?

[ULYCYC]

Do you have fresh fuel after winter storage. Not sure if Canada fuels have ethanol blends. But down here in the northeast US it sucks and builds up water in the tank with storage. That will give you knock issues.

[Shimy87]

Not on the shift, don't get that far. Will try the 3rd gear test when I check the fuel pressure.

Waited to run 2 tanks through, I also put stabil in for storage only keeping about 3 gallons over the winter.

Thanks for the help, I'll report back with what I discover!

[Shimy87]

Will ECM compensate for air temp? SM displays it. It's been mid 40's when knock happened, maybe lean?? O2 read 800 though??

[Scoobum]

You adjust fuel through Erics chip. Fuel pressure rising with boost? I'm curious...what were your 02's at WOT last summer?

[Steve Wood]

yes, it has some compensation for air temps....

[Shimy87]

You adjust fuel through Erics chip. Fuel pressure rising with boost? I'm curious...what were your 02's at WOT last summer?

Tried the quick fix of adding fuel, no change. O2's were between 800 and 810 last summer.
 
Hope to get out today and check FP rising and do the 3rd gear test.
 
Thanks!

[Shimy87]

Well got out today and did the 3rd gear test. The dam thing is over boosting again . Tried 2 tmes, both times boost jumped to 22lbs and knock was at 6.2 and 7.1. The wastegate arm has no tension and slips on to pin so no lowering the tension there.  replaced that solenoid on the valve cover last year when this was happening, that fixed it then. I'm thinking of just going back to the "tuner" style with the hose, not using the soleniod at all. I cant remember, do i just plug the hose at the solenoid or do I eliminate the Y fitting and run a single hose?

[Steve Wood]

Normally, we replace the plumbing with a straight hose.  Don't remember if plugging the hose will let it go as high when shortening the rod-try that first and see...that would be the easiest route

[Shimy87]

Went out to change that hose set-up and find the underside of the turbo and the wastegate covered in oil........... GREAT!! Assuming a seal has failed, will have to check into this at home, dont look like an at the office fix.

[daveismissing]

It may not be so bad (oil spray ) under proper boost levels?

[Steve Wood]

check the drainback line as well as the turbo oil feed line.  Pretty common for the drainback line (the larger line) to crack...partic ularly if some idiot left off the support bracket to the turbo