kronus
20+ Year Contributor
- 652
- 27
- Jan 15, 2006
-
Independence,
Missouri
1). Any boost, vac, or exhaust leaks?
Fixed all boost/vac leaks except for air leaking past turbo seal (read that was normal.) No exhaust leaks.
2). Verified mechanical timing?
Yes.
3). Verified base timing?
2g, non adjustable.
4). Ignition system
COP or Stock Coil: Stock
Wire brand and Age: O'Reilly house brand <6 months and <3k miles
Spark Plug brand, type and Gap:BPR6ES @ .028"
5). Motor health (Compression Test)
Have not performed a compression test - car has 90k original miles, was babied by original owner and is stock aside from hard IC pipes (also @ stock boost level.)
6). Performed basic throttle body adjustments?
Idle Switch: Yes (simulated in Link)
Throttle Cable: Yes
TPS:Yes
BISS: Yes
7). Compression ratio
Stock - 8.5:1
8). Any known bad sensors or brittle wiring?
None.
9). Any DTC/CEL codes?
None
10). Electrical system
Car off (not running): 12V?
Car running: 13V?
Haven't paid much attention to it, put a fresh battery in a year ago, alt. is newer replaced by previous owner.
11). Base fuel pressure and injector values
Base Fuel Pressure:Stock (43.5)
Injector Size (cc/min):450
12). Properly calibrated and configured wideband sensor
Sensor Brand: Innovate LC-2
Calibration Date: 05/15
13). Type of fuel
Type: Pump Gas 91 Oct
Percent of Ethanol: (whatever comes out of the pump)
14). Watched ECMlink how-to videos?
Yes.
I've been trying to figure out why I'm getting light load knock while cruising around 70. I took the car out for the first time in a month for a long drive because the weather has been cooler and I wanted to see if that would solve the issue. Nope.
Car is stock aside from hard pipes and is at stock boost. It has been babied its whole life so it is in excellent mechanical shape (90k miles.) Sorry the log is so long, but that was the most consistent portion of my 1.5 hour cruise on Sunday. I am aware that I still have a high ISC value. I had it down in the 30s @ idle a while ago, so I'm not sure what might have changed since then.
Aside from those details, I can't figure out if this knock is real or if the knock sensor is picking up some harmonic @ speed. And I know I have my knock sensor threshold pretty low, but I'd rather have it low and be reading false knock than ignore it and be whittling away my motor so to speak.
Let me know if I've missed anything or if you guys would like a more specific log. Thanks!
Fixed all boost/vac leaks except for air leaking past turbo seal (read that was normal.) No exhaust leaks.
2). Verified mechanical timing?
Yes.
3). Verified base timing?
2g, non adjustable.
4). Ignition system
COP or Stock Coil: Stock
Wire brand and Age: O'Reilly house brand <6 months and <3k miles
Spark Plug brand, type and Gap:BPR6ES @ .028"
5). Motor health (Compression Test)
Have not performed a compression test - car has 90k original miles, was babied by original owner and is stock aside from hard IC pipes (also @ stock boost level.)
6). Performed basic throttle body adjustments?
Idle Switch: Yes (simulated in Link)
Throttle Cable: Yes
TPS:Yes
BISS: Yes
7). Compression ratio
Stock - 8.5:1
8). Any known bad sensors or brittle wiring?
None.
9). Any DTC/CEL codes?
None
10). Electrical system
Car off (not running): 12V?
Car running: 13V?
Haven't paid much attention to it, put a fresh battery in a year ago, alt. is newer replaced by previous owner.
11). Base fuel pressure and injector values
Base Fuel Pressure:Stock (43.5)
Injector Size (cc/min):450
12). Properly calibrated and configured wideband sensor
Sensor Brand: Innovate LC-2
Calibration Date: 05/15
13). Type of fuel
Type: Pump Gas 91 Oct
Percent of Ethanol: (whatever comes out of the pump)
14). Watched ECMlink how-to videos?
Yes.
I've been trying to figure out why I'm getting light load knock while cruising around 70. I took the car out for the first time in a month for a long drive because the weather has been cooler and I wanted to see if that would solve the issue. Nope.
Car is stock aside from hard pipes and is at stock boost. It has been babied its whole life so it is in excellent mechanical shape (90k miles.) Sorry the log is so long, but that was the most consistent portion of my 1.5 hour cruise on Sunday. I am aware that I still have a high ISC value. I had it down in the 30s @ idle a while ago, so I'm not sure what might have changed since then.
Aside from those details, I can't figure out if this knock is real or if the knock sensor is picking up some harmonic @ speed. And I know I have my knock sensor threshold pretty low, but I'd rather have it low and be reading false knock than ignore it and be whittling away my motor so to speak.
Let me know if I've missed anything or if you guys would like a more specific log. Thanks!
Last edited:
