Changed spark plugs yesterday, now I'm getting a burning smell (???) - Chevelle Tech
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  #1  
Old Jul 6th, 10, 9:18 AM
Macho Macho is offline
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Evan
 
Join Date: Aug 2009
Location: NoVA
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Default Changed spark plugs yesterday, now I'm getting a burning smell (???)

Hey guys, the title of this thread says it all. I changed out my plugs yesterday. I'm not the most engine-savvy dude, but it was a straight forward swap out. Once the plugs were all in, I started the car up and took it up the highway to see if there was any improvement. After a few minutes, I noticed a burning smell. The engine ran fine, the idle was even, and everything seems to be in good working order. But the smell is noticeable and hasn't gone away. I drove the car a total of about ten miles, and when I got back to the house I could still smell it. Any ideas of what this is about? I figured maybe it was just the 'new spark plug smell'??? I've never changed plugs in a car before. Always let my mechanic do it, but I've never heard of plugs burning before...
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  #2  
Old Jul 6th, 10, 9:20 AM
dreis454 dreis454 is offline
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Dan
 
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Default Re: Changed spark plugs yesterday, now I'm getting a burning smell (??

Any spark plug wires touching the exhaust?
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72 ss 454 "W" code,w/cowl induction (how many left?)
matching # LS5 454+.060" 9.2 :1, 2.19/1.88 valves,Comp HR cam 289/295 234/240 .613/.613 110* (dyno'd @ 557hp @ 5400 & 583tq @ 4100)
matching # M22 w/CF dual friction clutch.
Holley 750 HPs dp(82751) on Weiand Stealth & MSD Pro billet HEI
Hedman Elite headers/Flowmaster exh. (w/super 40s)
TC#3095
Garage find parked from 1978-2004

http://macswebs.com/ls5registry/bal/bal.htm
http://www.chevelles.com/showroom/sh...0&ppuser=25834
http://ssregistry.macswebs.com/1972/1d37w2b_reis.htm
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  #3  
Old Jul 6th, 10, 9:22 AM
Macho Macho is offline
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Evan
 
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Posts: 57
Default Re: Changed spark plugs yesterday, now I'm getting a burning smell (??

I'll check at lunch time. I have these plastic spacers on the wires, but they are really friggin' close to the headers. It's almost unavoidable though, because of the proximity of the plugs to the headers, and where the wires have to go to get to the distributor. I don't understand why they designed it like that.
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  #4  
Old Jul 6th, 10, 9:27 AM
dreis454 dreis454 is offline
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Dan
 
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Default Re: Changed spark plugs yesterday, now I'm getting a burning smell (??

Quote:
Originally Posted by Macho View Post
I'll check at lunch time. I have these plastic spacers on the wires, but they are really friggin' close to the headers. It's almost unavoidable though, because of the proximity of the plugs to the headers, and where the wires have to go to get to the distributor. I don't understand why the dey designed it like that.
not mean't to be a jab but,The cheaper headers are like that. If you ever need to replace them,buy a 'top of the line" header & they will have more spark plug clearance.
__________________
72 ss 454 "W" code,w/cowl induction (how many left?)
matching # LS5 454+.060" 9.2 :1, 2.19/1.88 valves,Comp HR cam 289/295 234/240 .613/.613 110* (dyno'd @ 557hp @ 5400 & 583tq @ 4100)
matching # M22 w/CF dual friction clutch.
Holley 750 HPs dp(82751) on Weiand Stealth & MSD Pro billet HEI
Hedman Elite headers/Flowmaster exh. (w/super 40s)
TC#3095
Garage find parked from 1978-2004

http://macswebs.com/ls5registry/bal/bal.htm
http://www.chevelles.com/showroom/sh...0&ppuser=25834
http://ssregistry.macswebs.com/1972/1d37w2b_reis.htm
http://www.youtube.com/watch?v=YqZkVw6xMkM
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  #5  
Old Jul 6th, 10, 1:45 PM
427L88 427L88 is offline
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Gene
 
Join Date: Sep 2000
Location: Buffalo NY
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Default Re: Changed spark plugs yesterday, now I'm getting a burning smell (??

Yeah, you're likely burning one.

Here's a novice spark plug changer tip: I've found it to be stupid easy to break a new wire; I've done it a few times.

I always check "new" wires with a VOM. I always pull from the boot, and even bought a little tool to do that well ( it can be made easily).

Once you find your burning silicone, test the wire. They usually pull from under 1K to near 3K resistance depending on length.

Unless they're the good old solid core wires I used to run before the MSD. That's ZERO OHMS!
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  #6  
Old Jul 6th, 10, 7:49 PM
dreis454 dreis454 is offline
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Dan
 
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Default Re: Changed spark plugs yesterday, now I'm getting a burning smell (??

What did ya find? Evan
__________________
72 ss 454 "W" code,w/cowl induction (how many left?)
matching # LS5 454+.060" 9.2 :1, 2.19/1.88 valves,Comp HR cam 289/295 234/240 .613/.613 110* (dyno'd @ 557hp @ 5400 & 583tq @ 4100)
matching # M22 w/CF dual friction clutch.
Holley 750 HPs dp(82751) on Weiand Stealth & MSD Pro billet HEI
Hedman Elite headers/Flowmaster exh. (w/super 40s)
TC#3095
Garage find parked from 1978-2004

http://macswebs.com/ls5registry/bal/bal.htm
http://www.chevelles.com/showroom/sh...0&ppuser=25834
http://ssregistry.macswebs.com/1972/1d37w2b_reis.htm
http://www.youtube.com/watch?v=YqZkVw6xMkM
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  #7  
Old Jul 6th, 10, 10:35 PM
engineguy engineguy is offline
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Bill R
 
Join Date: Aug 2002
Location: Twin Lake, MI
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Default Re: Changed spark plugs yesterday, now I'm getting a burning smell (??

Evan,

No, I don't think it is "new spark plug smell". As other have mentioned, check your wires to make sure that a wire, or boot, is getting fried by the headers. All headers, even the "good" ones will come very close to the spark plugs in some of the cylinders. Also, your new plugs may be slightly longer than the ones they are replacing. Care must be taken and as other have mentioned too, it is always a good idea to check the resistance in the wires when changing plugs.
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64 Chevelle Malibu Sport Coupe (original owner) car now has 427" BB, Jerico 5-spd. trans., Dana 60 rear end.

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