TT chip and octane

[Shimy87]

When I swap the ESC if that help can a guy get a replacement anywhere? I read a bunch and can't tell if they are available anymore

[Steve Wood]

I don't think they are.  You would have to look for an used one.  I don't think they fail often.  I did read while searching that putting teflon tape on the threads is bad because it screws up the ground of the knock sensor.

[Shimy87]

I read that also, but today when I removed it to torque it in correctly, the threads had all cut through the Teflon, had to be grounding ok.....you would need a massive amount of Teflon to effect the grounding I would think

[Steve Wood]

I agree.  On the other hand it happens at times on coolant sensors and such

[Shimy87]

Car show

[Steve Wood]

That's great! Memories are built on days like this

[Shimy87]

Pulled plugs in kids car, was hoping to find a couple really white ones. They all look fine to me. Top row is passenger side.. the front one looks a touch whiter than the rest.. was thinking maybe an injector or 2 might have some trash in them causing my problem from when I first fired the car, lines were pretty dirty I found out then when I was checking fuel pressure. I still might pull them and get them cleaned again just to rule it out. This cars O2 just run way to low when you lift off throttle. My car doesn't ....it drops to some 350-400 numbers, kids car drops to alot of below 50 numbers, sometimes it even reads zero.

[Steve Wood]

That is what I was wondering...  it should look like your other car

[Shimy87]

Well, freshly cleaned and flow tested injectors and......same crap. Its definitely not a fuel delivery problem, and if its getting un metered air i have no idea where It could be coming from. When the knock shows up on SM, O2 is 790ish. I'm convinced its false and sensor is "hearing" something else. Next try will be some serious Teflon on half the knock sensor threads and instead of using torque wrench to 14 pounds just hand tight and try that. Have not switched the spark module yet, want to try this first. Then that. Running out of ideas. It runs so good with no boost, blms at 128, just really smooth and nice, starts great and idles smoothly...... I just don't get it

[gnonyx]

Well, freshly cleaned and flow tested injectors and......same crap. Its definitely not a fuel delivery problem, and if its getting un metered air i have no idea where It could be coming from. When the knock shows up on SM, O2 is 790ish. I'm convinced its false and sensor is "hearing" something else. Next try will be some serious Teflon on half the knock sensor threads and instead of using torque wrench to 14 pounds just hand tight and try that. Have not switched the spark module yet, want to try this first. Then that. Running out of ideas. It runs so good with no boost, blms at 128, just really smooth and nice, starts great and idles smoothly...... I just don't get it

How are you measuring the un metered air?

[Steve Wood]

I'm pretty sure the esc is not the problem. You can swap to check

[Steve Wood]

Also, the question of unmetered air appears to have disappeared after you changed the maf and the o2s came up.

[Shimy87]

Yes, the changed MAF did work much better. I wouldnt think O2's in the 790 area would create knock? I had to put the working powerlogger ECM back in my car so no logs, and the SM cycles slower without it, but the knock reading also jumps to high ( 5 to 7) numbers right away. I though real knock built slower. 

other than tweeking the knock sensor, I also need to do a new search for ANYTHING that might be hitting/rattling or that is loose that it might be hearing.

[Steve Wood]

760-790 should not show knock in a normal situation particularly at those boost levels altho we know we cannot run as much boost on 91.  We also don't know what the 91 that you buy might actually be.

I have seen o2 numbers above 820 appear to trigger the knock sensor.  Some papers I have seen claim one can gave rich detonation.  I think I will stick with abnormal combustion since I am not smart enuf to know.

Most real detonation that I have seen starts low and increases each frame with regard to timing retard until one lifts off the pedal.  This seems wobble around in the same general level.

You say you can hear it.  If you disconnect the knock sensor and try a run, do you still hear it?

you might try raising the octane some and see what happens.  Most booster are junk but some say this works   https://www.amazon.com/RACE-GAS-100032-Race-Concentrate-Octane/dp/B015HRK7ZS/ref=as_li_ss_tl?s=automotive&ie=UTF8&qid=1530730329&sr=1-24&keywords=octane+booster&linkCode=ll1&tag=vs-ag-comm-topoct-20&linkId=3019e22f74fade18aabb7cfeb21f8ab7

the other one that I have heard works is the Torco unleaded booster

[Shimy87]

Since I switched the MAF I have never heard it again.

I have some Torco I need to use in a different car, it does work, I will give that a try and see what happens

Thanks!!