First log

masa79 · Apr 25, 2005

What do you think my log results?There is very high knock and don´t know what causes it because my car is stock except "free mods".Is my fuel pump bad or what.Not found any boost leaks.Should i try to rewire fuel pump?

Time (secs), Air Flow Hz (Hz), Engine Speed (RPM), Fuel Trim High (%), Fuel Trim Low (%), Fuel Trim Middle (%), Injector Pulse Width (ms), Knock Sum, Oxygen Sensor (V), Timing Advance (°)
297.85, 869.13, 3687.50, 100.00, 100.00, 100.00, 14.59, 0.00, 0.72, 19.00
298.10, 944.71, 3750.00, 100.00, 100.00, 100.00, 6.66, 3.00, 0.78, 36.00
298.36, 245.62, 3781.25, 100.00, 100.00, 100.00, 1.28, 0.00, 0.66, 38.00
298.62, 188.94, 3500.00, 100.00, 100.00, 100.00, 4.10, 0.00, 0.70, 29.00
298.86, 547.93, 3968.75, 100.00, 100.00, 100.00, 8.19, 0.00, 0.72, 31.00
299.09, 812.45, 5156.25, 100.00, 100.00, 100.00, 13.57, 1.00, 0.72, 23.00
299.32, 1253.31, 5093.75, 100.00, 100.00, 100.00, 17.41, 5.00, 0.72, 16.00
299.57, 1467.44, 5187.50, 100.00, 100.00, 100.00, 17.15, 17.00, 0.68, 15.00
299.82, 1385.57, 5375.00, 100.00, 100.00, 100.00, 16.13, 16.00, 0.68, 18.00
300.06, 1366.67, 5406.25, 100.00, 100.00, 100.00, 15.36, 16.00, 0.72, 18.00
300.32, 1372.97, 5468.75, 100.00, 100.00, 100.00, 15.10, 16.00, 0.72, 19.00
300.56, 1410.76, 5687.50, 100.00, 100.00, 100.00, 15.10, 15.00, 0.72, 22.00
300.78, 1417.06, 5718.75, 100.00, 100.00, 100.00, 15.36, 20.00, 0.74, 20.00
301.01, 1423.36, 5843.75, 100.00, 100.00, 100.00, 15.62, 33.00, 0.72, 16.00
301.48, 1461.15, 6000.00, 100.00, 100.00, 100.00, 15.62, 38.00, 0.72, 15.00
301.71, 1486.34, 6062.50, 100.00, 100.00, 100.00, 15.62, 37.00, 0.72, 14.00
301.94, 1467.44, 6125.00, 100.00, 100.00, 100.00, 15.36, 37.00, 0.74, 14.00
302.18, 1492.64, 6187.50, 100.00, 100.00, 100.00, 15.10, 37.00, 0.74, 14.00
302.39, 1467.44, 6218.75, 100.00, 100.00, 100.00, 3.07, 40.00, 0.82, 32.00
302.61, 239.33, 6062.50, 100.00, 100.00, 100.00, 1.28, 18.00, 0.53, 40.00
302.84, 119.66, 5406.25, 100.00, 100.00, 100.00, 1.28, 0.00, 0.55, 45.00
303.07, 44.09, 4906.25, 100.00, 100.00, 100.00, 1.28, 0.00, 0.59, 44.00
303.30, 31.49, 4468.75, 100.00, 100.00, 100.00, 2.05, 0.00, 0.78, 41.00
303.55, 453.46, 4718.75, 100.00, 100.00, 100.00, 8.45, 0.00, 0.72, 28.00
303.82, 812.45, 4656.25, 100.00, 100.00, 100.00, 12.29, 0.00, 0.76, 24.00
304.09, 1108.45, 4750.00, 100.00, 100.00, 100.00, 17.15, 13.00, 0.72, 12.00
304.33, 1297.40, 4781.25, 100.00, 100.00, 100.00, 15.36, 26.00, 0.76, 16.00
304.58, 925.81, 4812.50, 100.00, 100.00, 100.00, 10.50, 25.00, 0.74, 18.00
304.85, 869.13, 4812.50, 100.00, 100.00, 100.00, 1.28, 23.00, 0.82, 38.00
305.11, 138.56, 4593.75, 100.00, 100.00, 100.00, 1.54, 0.00, 0.64, 42.00
305.37, 188.94, 4156.25, 100.00, 100.00, 100.00, 1.54, 0.00, 0.55, 41.00
305.63, 75.58, 3718.75, 100.00, 100.00, 100.00, 0.00, 0.00, 0.66, 27.00

eyebrowski · Apr 25, 2005

If you can throw up a log with rpm, knock, timing and o2 it would be a big help, you have a lot of uneeded stuff in that log. Make the log from 2500RPMs to redline in 3rd gear at WOT. From the look of your log though it looks like you are real lean.

masa79 · Apr 25, 2005

I only have this second gear pull. What can i do if it is too lean?

Engine Speed (RPM),Knock Sum, Oxygen Sensor (V), Timing Advance (°)
2500.00, 0.00, 0.00, 34.00
2562.50, 0.00, 0.00, 34.00
2593.75, 0.00, 0.00, 33.00
2687.50, 0.00, 0.02, 33.00
2750.00, 0.00, 0.02, 32.00
2875.00, 0.00, 0.02, 32.00
3000.00, 0.00, 0.02, 32.00
3125.00, 0.00, 0.02, 29.00
3218.75, 0.00, 0.78, 27.00
3375.00, 0.00, 0.02, 26.00
3593.75 0.00, 0.06, 26.00
3781.25, 0.00, 0.64, 23.00
4031.25, 0.00, 0.74, 19.00
4281.25, 6.00, 0.70, 18.00
4562.50, 6.00, 0.72, 20.00
4843.75, 11.00, 0.72, 18.00
5093.75, 11.00, 0.72, 19.00
5406.25, 11.00, 0.72, 21.00
5656.25, 18.00, 0.72, 22.00
5875.00, 33.00, 0.74, 17.00
6156.25, 37.00, 0.72, 14.00
6312.50, 37.00, 0.76, 18.00
6187.50, 21.00, 0.53, 40.00
5593.75, 0.00, 0.49, 45.00
5031.25, 0.00, 0.06, 29.00

eyebrowski · Apr 25, 2005

Is this a new problem or has it always been an issue?

masa79 · Apr 25, 2005

I don´t know because this was my first log. Two weeks ago I changed cyl1 injector because it was clogged and car runs 3 cylinders. I changed fuel filter too and it was very dirty.

eyebrowski · Apr 26, 2005

masa79 said:
I don´t know because this was my first log. Two weeks ago I changed cyl1 injector because it was clogged and car runs 3 cylinders. I changed fuel filter too and it was very dirty.

If you were having problems with one of your injectors I would check out the others as well. Your o2s look very low.

masa79 · Apr 26, 2005

Before this log i thought car is ok because car pulls hard and no stuttering. I don´t get it why there is so much knock without any upgrades.

masa79 · Apr 26, 2005

I try to change also other 3 injectors and see again log result. How i can test my injectors are they good?

eyebrowski · Apr 26, 2005

These guys clean, flow test, and remanufacture.

http://www.cruzinperformance.com/cars/

But truthfully it would probably be cheaper to pick up a set of known to be good used injectors.

greenstreak · Apr 26, 2005

You look to be running lean as you run the car out which is kicking up some knock.

Try the common knock fixes and I would also make sure your afpr is rising at a 1:1 rate with boost like it is supposed too.

First log

masa79

eyebrowski

masa79

eyebrowski

masa79

eyebrowski

masa79

masa79

eyebrowski

greenstreak

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