[Mobile-Portable] 2003 Tahoe Ignition Noise

Mon, 15 Sep 2003 16:10:13 -0700

That's very interesting, because at my place of employment we have several 
GM/Chevy SUVs and trucks, and all the late models I've listened to (99-03) 
are stone cold quiet, every one of them.
Inspection of the engine compartment shows more and better grounding than 
the morons at Ford ever dreamed of (speaking as a star-crossed F-150 owner).
So, with that, I would offer:
1. The small square boxes are COP (coil-on-plug) ignition modules.  No more 
HV wires and distributors.  Each box is its own autotransformer that fits 
atop the plug.
2. It may be that there are some grounding/installation issues to be 
addressed.  My initial observation is based upon driving my own HF-mobile 
setup around the GM/Chevy vehicles in question, so the observation is 
separate from installation.
GL!

At 15:31 2003-09-15, [email protected] wrote:
>I am looking for any advice from someone who has been down the road before me
>relative to the terrible iginition noise in a 2003 Chevy Tahoe.
>
>I am amazed that GM lags so far behind the other auto makers in this area.  I
>have friends with Chrysler  and Lexus products which are absolutely dead
>quiet yet this Tahoe is as bad as any car/truck that I have ever heard.  Does
>anyone have an email address for someone in GM engineering that I can 
>write to
>regarding this?  I expect that I will just get a blank stare from the 
>local Chevy
>dealer/rocket scientist!
>
>The noise is not the fuel pump, ignition for sure.  The spark plug wires are
>about 6 inches long and lead to a small square box for each spark plug.  Can
>someone explain what is going on here?
>
>Has anyone tamed a Tahoe?
>
>73 Randy W9ZR
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Scott Townley NX7U
Gilbert, AZ  DM43di
http://members.cox.net/nx7u