Exhaust overheating burning carpet in trunk

Asked by Jul 10, 2016 at 02:01 PM about the 2004 Pontiac Grand Am GT

Question type: General

My car was running rough so I changed the
spark plugs and coil packs and now I'm
getting a horrible burning smell, carpet in
trunk is blackened burnt and HOT! But heat
shields are intact as far as I can tell and no
exhaust leaks. What could be causing this?
It didn't do this before I changed out the
spark plugs and coil packs.

5 Answers

18,775

How is the catalytic converter? When they get bad they can get red hot.

120

Have you been loosing performance lately, especially on hills? It could be a bad cat, Bad Injectors, Timing issue, Burnt out Exhaust valve.

Car is fine as far as I can tell. I found a wire not connected to a spark plug. Plugged it in properly, cleaned air filter too and test drove it ( city and highway speeds). Regained lost power, no more gas smell and metal floor of the trunk doesn't feel overly hot anymore. ( I pulled up the carpet, etc.) No longer running rough. But thanks!

Cat* is what I meant not car. Sorry, smart phones sometimes aren't so smart.

18,775

Okay, well a spark plug not plugged in would certainly cause a rough running engine lol. The air-fuel mix going into that cylinder wasn't being burned, and instead going into the exhaust where it did burn, hence the super hot exhaust. You must have been throwing O2 codes like crazy too.

Your Answer

Add photo

Related Questions

Grand Am

Looking for a Used Grand Am in your area?

CarGurus has 1,632 nationwide Grand Am listings starting at $1,298.

ZIP:

Search Pontiac Grand Am Questions

UK Questions

Are you a UK consumer? CarGurus now has a discussion forum in the UK.

Pontiac Grand Am Experts

#1 tenspeed
tenspeed
Reputation 7,340
#2 John Saffrahn
John Saffrahn
Reputation 1,510
#3 Tom Demyan
Tom Demyan
Reputation 1,320
View All

Related Models For Sale

Used Pontiac Grand Prix
24 Great Deals out of 3,722 listings starting at $879
Used Pontiac G6
75 Great Deals out of 5,072 listings starting at $1,295
Used Ford Mustang
565 Great Deals out of 43,003 listings starting at $1,699
Used Chevrolet Impala
956 Great Deals out of 35,425 listings starting at $1,700
Used Pontiac GTO
6 Great Deals out of 474 listings starting at $5,500
Used Honda Accord
1,010 Great Deals out of 75,622 listings starting at $899
Used Chevrolet Malibu
1,182 Great Deals out of 83,203 listings starting at $1,800
Used Toyota Camry
1,240 Great Deals out of 97,272 listings starting at $1,250
Used Ford Taurus
326 Great Deals out of 21,198 listings starting at $1,800
Used Pontiac Bonneville
9 Great Deals out of 652 listings starting at $1,375
Used Chevrolet Cavalier
1,309 listings