12-04-2012, 07:19 AM | #1 |
Drives: 2011 Camaro 1LT Join Date: Oct 2011
Location: Delaware
Posts: 456
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Datalog results: knock retard??
I was having an issue with my engine sounding like it was laboring mostly when maintaining a constant speed when going up an incline or even sometimes on straightaways between 40 and 45 mph. BNR told me to datalog and send it to them and this is the response trifecta sent:
"There is a mechanical issue with this car. It shows knock retard constantly. There's a good chance it's false knock, probably a rattling exhaust or something else rattling. Please have it fixed and re log" My questions are has anyone else had this diagnosis and if so what did you do to get it fixed? I dont hear a y rattling of the exhaust. I have an appt at the dealer Friday but have no idea wha to tell them to look at since I obviously can't tell them I was told this by trifecta. Any suggestions or tips would be great. Thanks!
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2011 IOM 1LT RS. K&N Typhoon CAI; Sequential taillights, SLP faded gill overlays, VMAX CNC ported TB, RX Ported IM, RX breather, 3/8" Black Ice-olator, OEM STB, 4 gauge pack, Alpine amp and sub, convertible spoiler, IOM painted rear diffuser, SS front and rear sways, SS front and rear struts and springs, Street Scene front splitter, IOM hideaway headlight covers, 5% window tint.
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12-04-2012, 07:30 AM | #2 |
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Drives: 2010 2LT/RS M6 Join Date: Jun 2010
Location: NE Ohio
Posts: 1,137
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flash the stock tune, make sure it still runs badly, take to the dealer.
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12-04-2012, 08:22 AM | #3 |
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Drives: 2012 2SS CAMARO 45th Join Date: Apr 2011
Location: St. Charles, IL
Posts: 18,663
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It doesn't have to be something you can hear. GM vehicles are equipped with knock sensors to ensure the motor isn't in danger of blowing up. When they sense knock the automatically retard the timing of the vehicle. You can be picking up false knock from a few different things. An exhaust rattle or any sort of vibration in the motor will cause it. Or you could simply be running to much timing and setting off your knock sensors. What kind of fuel have you been running? If your Trifecta tune is set up for 93 octane and you're running subpar fuel that could be the reason right there. Like h2oplay mentioned. Return your tune back to stock and then retest your car. It might be an over aggressive tune as well.
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12-04-2012, 10:18 AM | #4 |
Drives: 2011 Camaro 1LT Join Date: Oct 2011
Location: Delaware
Posts: 456
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I've been using 87 octane. I emailed BNR to see what octane the tune was set at. I'm going to reflash to stock today and see how it feels the next few days. Thanks for the responses.
Ben
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2011 IOM 1LT RS. K&N Typhoon CAI; Sequential taillights, SLP faded gill overlays, VMAX CNC ported TB, RX Ported IM, RX breather, 3/8" Black Ice-olator, OEM STB, 4 gauge pack, Alpine amp and sub, convertible spoiler, IOM painted rear diffuser, SS front and rear sways, SS front and rear struts and springs, Street Scene front splitter, IOM hideaway headlight covers, 5% window tint.
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12-04-2012, 11:11 AM | #5 |
Drives: 2011 CGM Camaro LS A6 Join Date: Jan 2011
Location: San Antonio, Texas
Posts: 10,305
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The tune isn't set at any specific octane. But if you're using 89, the ecu is pulling timing. If u want the least amount of knock retard, use 93
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12-04-2012, 11:14 AM | #6 |
Drives: 2011 Camaro 1LT Join Date: Oct 2011
Location: Delaware
Posts: 456
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Yeah, I think first I'm going to flash back to stock and see how that works. Then I'll start putting in the highest octane. That way I'll know if it's the tune causing the problems or the octane or something else.
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2011 IOM 1LT RS. K&N Typhoon CAI; Sequential taillights, SLP faded gill overlays, VMAX CNC ported TB, RX Ported IM, RX breather, 3/8" Black Ice-olator, OEM STB, 4 gauge pack, Alpine amp and sub, convertible spoiler, IOM painted rear diffuser, SS front and rear sways, SS front and rear struts and springs, Street Scene front splitter, IOM hideaway headlight covers, 5% window tint.
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12-04-2012, 11:16 AM | #7 |
Drives: 16 Camaro SS, 15 Colorado Join Date: May 2009
Location: Jefferson City, Missouri
Posts: 13,941
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I really need to get out and datalog my car again soon.
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