AEM 03-0300 Reading rich but still getting knock.

[ShaunKris]

Eric, I hope I am putting this in the right place, I am not sure where to go with this, I can move this thread if you would prefer it somewhere else.
I have the W/B grounded to the ECM case.
The car (#project84foria) 1984 Grand National, has an AXiS with proper chip, and Siemans 60lb injector combo from here. I have removed ALL timing from the HIGH adjustment, and ALL fuel from the AXiS. The Headers and DP are wrapped, it has plenty of cooling with a Flowkooler pump and Coldcase Rad, and a 160 degree thermostat. I am having some issues with a "lazy" sender as it will not kick the relay over. so the system was hot wired for these logs. A friend suggested that it could be injectors or an injector issue or possibly chip.
The heads are freshly ported and rebuilt, the intake is also ported it has a bigger billet bell connection, and a TA33 turbo w/RJC boost controller, the Dp is 2.5". I smoked the exhaust to look for leaks and found none. I also smoked the intake and found the butterfly seeping a tiny bit. I have NOT smoked the block case.
Plug wires and Plugs are new. NGK UR5.
I do hear what sounds like an exhaust leak on the passenger side but could not find it. Do you think it could it be a bad lifter and would that cause knock? It has a flat tappet 202-210 FTap cam in it.
I put the thread here due to the rich reading that the AEM is showing.

Suggestions?

 

[EricM]

I think you have 2 different issues.
One is the wideband not reading right. When you say its grounded to the ECM case, which ground wire? It's also possible the sensor went bad.
The other issue is the knock. I suspect that's false knock, since it's happening as low as 0psi boost. I almost looks more RPM related, as it always starts at 3300-3400rpm. That might indicate some kind of engine noise.
One of the best ways to prove out if its false is to run some race fuel, or a bunch of octane boost, then see if the knock retard changes at all.
What octane fuel are you running now?

 

[ShaunKris]

I think you have 2 different issues.
One is the wideband not reading right. When you say its grounded to the ECM case, which ground wire? It's also possible the sensor went bad.
The other issue is the knock. I suspect that's false knock, since it's happening as low as 0psi boost. I almost looks more RPM related, as it always starts at 3300-3400rpm. That might indicate some kind of engine noise.
One of the best ways to prove out if its false is to run some race fuel, or a bunch of octane boost, then see if the knock retard changes at all.
What octane fuel are you running now?

Okay, I'll dive into the wiring again. I have done this a couple times already, I must have missed something. I will get a new sensor as well just to verify. The BROWN wire is grounded to the case, the WHITE wire is attached to the signal on the Powerlogger.
When you say 'which' ground wire, are you referring to the black wire? Should it be grounded to the case also? https://www.aemelectronics.com/site...0 X-Series Wideband UEGO AFR Sensor Gauge.pdf

As far as engine noise goes, how do you find something like this?
I pulled the Knock sensor just to verify that it was installed with the correct torque. Are there common engine noises that are typical in this area of trouble shooting?

I'm running 94 Octane, however many people have said that our 94 in Canada is like your 91.

 

[ShaunKris]

Ok, I rebuilt my grounds and it seems to have helped the W/B read a lot better. attached is the log. By the way thanks for being so prompt!!

 

[ShaunKris]

I'm going to transfer back to the AXiS Interface thread to stay on topic.