Detonation at any RPM
08-06-2012, 06:40 PM
#1
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Detonation at any RPM I am having huge detonation issues, anytime I touch the gas pedal it detonates. I can do anything that I want on these cars but I can not figure out why this car detonates. It is completely stock. Well except for a muffler that is stock for me.
What steps should I take before actually going through and tearing this thing apart.
What steps should I take before actually going through and tearing this thing apart.
08-07-2012, 09:33 PM
#5
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also, is it running excessively lean, does it have carbon deposits, is it overheating, are MAP/MAF sensors not working (causing incorrect timing advance)...?
you have to diagnose it (and not just tear it apart);
are you sure it is detonating (and not knocking from the bottom end)...?
you have to diagnose it (and not just tear it apart);
are you sure it is detonating (and not knocking from the bottom end)...?
Last edited by joecar; 08-09-2012 at 10:44 AM.
08-08-2012, 06:23 PM
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As stated the car is totally stock, there is nothing done to it. It happens every time the gas is touched, so bad gas has been ruled out, as I have been through at least 40 tanks with the same issue. There are no check engine lights, car has 150k miles, it is clearly detonation, sounds like marbles rolling around.
As far as carbon build-up not sure, I have not torn the car apart. I would rather not on this one.
Everything seems to be working correctly.
and no overheating either
As far as carbon build-up not sure, I have not torn the car apart. I would rather not on this one.
Everything seems to be working correctly.
and no overheating either
08-08-2012, 06:49 PM
#7
40 tanks of gas with 100% full-time detonation.......the engine would be dead by now.
You most likely have a failing 02 sensor(s). NO...you will NOT get an SES light or a code on all cars, PCM's act differently from car to car.
Get it scanned with the engine running to see how the 02's are switching........see if they are wacked.
.
You most likely have a failing 02 sensor(s). NO...you will NOT get an SES light or a code on all cars, PCM's act differently from car to car.
Get it scanned with the engine running to see how the 02's are switching........see if they are wacked.
.
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08-09-2012, 10:10 AM
#10
so bad gas has been ruled out, as I have been through at least 40 tanks with the same issue.
What you are hearing is something else, but not detonation. Frankly I doubt a stock LS1 would last more than a tankful if detonation is present the whole time, much less 40.
