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Spark wire touched the manifold, caused CAT failure?

 
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shengang1203
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PostPosted: Mon Aug 22, 2011 4:33 pm    Post subject:  Spark wire touched the manifold, caused CAT failure? Reply with quote

My friend has one 2003 impala. This weekend he felt car oscillating during driving, then went to Firestone and was told that the spark wires touched the manifold, misfired (due to the heating?) and caused CAT failure. The cost was $1200 to fix.

So how did that happen? I saw some spark wires (for instance, wires #2, #4, #6) lying on the engine.

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IffyG
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PostPosted: Mon Aug 22, 2011 4:57 pm    Post subject:   Reply with quote

If a plug stops firing all together, it's dumping tons of unburned fuel into the cat and that will cause it to cook itself in a hurry.

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shengang1203
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PostPosted: Mon Aug 22, 2011 5:05 pm    Post subject:   Reply with quote

OK. Thanks.

Then how could we prevent the wires from touching the manifold? I just do not understand why the wires touched the manifold. Also isn't the wire heat-resistible?

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IffyG
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PostPosted: Mon Aug 22, 2011 5:22 pm    Post subject:   Reply with quote

I'm not sure why it would have dropped down to touch the manifold, but yes the wires are heat resistant, but they wouldn't stand a chance against an exhaust manifold.

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PostPosted: Mon Aug 22, 2011 6:25 pm    Post subject:   Reply with quote

IffyG wrote:
I'm not sure why it would have dropped down to touch the manifold, but yes the wires are heat resistant, but they wouldn't stand a chance against an exhaust manifold.


I agree. Exhaust manifolds get SUPER hot. Maybe the wire the too long for that location. I've done that before.

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PostPosted: Mon Aug 22, 2011 6:46 pm    Post subject:  spark wire touched manifold Reply with quote

first and main problem . . . going to Firestone. Why do people still go there . . . Cool

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PostPosted: Mon Aug 22, 2011 7:57 pm    Post subject:   Reply with quote

1st off...replace the wires...second if the car has under 120K take it to gm dealer...they are required to warranty the cat. Unless they got away with not having to do that from going bankrupt.
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shengang1203
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PostPosted: Mon Aug 22, 2011 9:29 pm    Post subject:  Re: spark wire touched manifold Reply with quote

Thank you all.

topgun wrote:
first and main problem . . . going to Firestone. Why do people still go there . . . Cool


I would never go to Firestone. But my friend was not aware of that and it was the closet shop at that time.

98ss wrote:
1st off...replace the wires...second if the car has under 120K take it to gm dealer...they are required to warranty the cat. Unless they got away with not having to do that from going bankrupt.


His car is 2003 Impala. I thought that was for 2001 and 2002 cars? And the CAT converter was already replaced.

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98ss
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PostPosted: Tue Aug 23, 2011 7:21 pm    Post subject:   Reply with quote

Its 10 years 120K for all cars sold in the usa.
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IffyG
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PostPosted: Tue Aug 23, 2011 8:39 pm    Post subject:   Reply with quote

98ss wrote:
Its 10 years 120K for all cars sold in the usa.


Nope. GM extended the warranty on 2001 and 2002 W-bodies from the federal 8 year/80k to 10 year/120k.

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PostPosted: Fri Aug 26, 2011 8:41 pm    Post subject:  Oh man I am soooo pissed right now. Reply with quote

Are you guys serious the federal law requires catalytic converters to be warrantied for 8 years/80,000 miles? I had mine replaced in my 2003 Impala with 70,000 miles on it 4.5 years ago! And it cost me over $1000 to change it out. I was much more naive back then but that just pisses me off.

Even better is I have no recourse because the dealer so kindly hooked me up with an extended warranty plan for like $1500 that essentially allowed me to finance that repair and covered me for 24,000 more miles so I wasn't technically billed for the Cat. Hmmm...seems suspicious.
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IffyG
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PostPosted: Fri Aug 26, 2011 8:46 pm    Post subject:   Reply with quote

I had to 'remind' the dealer that my cat was covered by the special policy adjustment....

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