4.6L General Discussion This section is for non-tech specific information pertaining to 4.6L (Modular) Mustangs built from 1996 to 2004.

Pinging/Knocking

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Old Sep 24, 2007 | 07:49 PM
  #1  
pikuoff's Avatar
pikuoff
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Joined: Aug 2005
Posts: 366
From: Rockville, MD
Default Pinging/Knocking

I just bought a SCT XCal2 with a tune from VMPTuning. I have a 2001 GT with just the JLT Ram Air Intake but I got it mainly to turn off the MIL indicator for when I put on my MAC Prochamber and CatBack. That and to give my car a little more "giddyup"

I am on my second tank of 93 octane so I figured it would be in the system enough to load my 93 octane tune. I do have more pep in the car but when I get on it, I am getting some pinging. It pings when I am at higher RPMs (4k+) or if I'm going 30 MPH in 3rd gear and give it some gas (basically floor it). Normal acceleration and cruising is fine.

Any thoughts out there as to what may be wrong? I figured I can rule out an exhaust leak since I haven't changed that yet and since it wasn't happening before I loaded the tune. The gas is from Exxon so I think it's good gas. The spark plugs are only about 2 weeks old and when I replaced them, the old ones looked fine. I'm not really sure what else to look for...
Old Sep 24, 2007 | 07:51 PM
  #2  
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97targa
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Joined: Apr 2006
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Default RE: Pinging/Knocking

I'd say your timing is too far advance at higher rpm's for the gas you have! You can turn down the timing for each rpms range I believe. Your timing should be least above 4k rpms!
Old Sep 24, 2007 | 07:55 PM
  #3  
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pikuoff
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Joined: Aug 2005
Posts: 366
From: Rockville, MD
Default RE: Pinging/Knocking

Crap, I meant to post this in the tech section. Can a mod move it?

97Targa: Does that still apply if it happens at the lower RPMs like I mentioned with the 30 MPH in 3rd gear and flooring it? It's low RPM for that.
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