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Stinky hard acceleration

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Old Jun 10, 2022 | 04:04 PM
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Default Stinky hard acceleration

04 LS1 bone stock
Smells like *** terribly when accelerate hard and not even at WOT. Kind of eggy smell.

Runs and idles like a dream
has:
air stock grade filter new
oil new synthetic oil
MAF sensor and grid cleaned
Top Tier premium fuel only

Plugs and wires appear to have been replaced less than 5,000 miles ago based on records.

shes not had a hard life. My parents had it before me and drove it like a standard passenger car.

normal or somethin i can evaluate/replace that haven’t considered?
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Old Jun 10, 2022 | 04:06 PM
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Bad cats.
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Old Jun 10, 2022 | 04:18 PM
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Nothing wrong with your car, the tune from the factory adds fuel when you go wide open to prevent pre detonation.
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Old Jun 10, 2022 | 06:37 PM
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Originally Posted by mmartinez
Nothing wrong with your car, the tune from the factory adds fuel when you go wide open to prevent pre detonation.
What is the connection between that, and smell? Also, I think every vehicle adds fuel at WOT.
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Old Jun 10, 2022 | 06:49 PM
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It’s called Power Enrichment.
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Old Jun 11, 2022 | 06:20 AM
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Originally Posted by Aerovette;[url=tel:1605255491
1605255491]Bad cats.
Ah- that makes sense it could be that.
perhaps I’ll cope with it vs pouring money into that. Or perhaps I’ll put the car on jack stands in the driveway to get it up high enough that a cat thief could slide under it- lol
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Old Jun 11, 2022 | 09:12 AM
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Bad cats would cause this rotten egg smell all the time, it is the power enrichment that causes this smell. My 97 coupe would do the same thing everytime I drove it hard.
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Old Jun 11, 2022 | 10:22 AM
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Originally Posted by mmartinez
Bad cats would cause this rotten egg smell all the time, it is the power enrichment that causes this smell. My 97 coupe would do the same thing everytime I drove it hard.
Respectfully disagree. In the case of my truck, low RPM allowed the cats to do their thing. High RPMs overwhelmed the catalytic process. It's impossible to diagnose on a forum, but almost every brand of vehicle come up if you do a search for "egg smell under hard acceleration" with the same diagnosis. Adding to that what my personal experience has been, and it points to cats. My 2004 did not smell like eggs ever. Not at idle, not at WOT so unless my car was a freak, I would not say that smell is normal.

Last edited by Aerovette; Jun 11, 2022 at 10:49 AM.
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Old Jun 11, 2022 | 12:22 PM
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To each his own, I am only speaking of my personal experience with my 97, and after supercharging and of course new tune,, my car no longer has that funky smell after being driven hard, "boost".
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