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What does my plug tell you?

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Old Jun 6, 2025 | 09:03 PM
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seanakeough's Avatar
seanakeough
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Joined: Apr 2024
Posts: 19
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Car: 1985 Trans Am
Engine: 350/290 crate with 650CFM Holley
Transmission: 700R4
Axle/Gears: 3.27 Std 7.75 ring gear 9 bolt
What does my plug tell you?
It's been in about a year. Perhaps 500km. She hesitates sometimes when I give her the beans.
Last edited by seanakeough; Jun 6, 2025 at 09:32 PM.
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Old Jun 7, 2025 | 08:39 AM
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Komet's Avatar
Komet
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Joined: Feb 2021
Posts: 1,211
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From: WA
Car: 1989 IROC-Z
Engine: L98 350 TPI
Transmission: 700R4
Axle/Gears: BW 9 Bolt / 2.77 Posi
Re: What does my plug tell you?
If you look at the color on the electrode there, it looks like you should hook up a scan tool and check the data.
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Old Jun 7, 2025 | 09:11 AM
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bennettcvcu
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Joined: Jul 2009
Posts: 165
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From: Edenton, NC
Car: 1988 IROC-Z
Engine: L03 to L05: 350 TBI
Transmission: MD8: 700R4
Axle/Gears: GU2: 10 bolt/2.73
Re: What does my plug tell you?
Heat range looks good and AFR looks spot on. I wouldn't change anything.
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Old Jun 8, 2025 | 12:28 PM
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8t2 z-chev's Avatar
8t2 z-chev
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From: belle fourche,s.d.
Car: '82 z28
Engine: L83 5.7
Transmission: 700r4-1985
Axle/Gears: 3.42 posi
Re: What does my plug tell you?
I 2nd it looks very good.
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Old Jun 9, 2025 | 06:07 AM
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Blue 90 RS's Avatar
Blue 90 RS
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From: Charleston, SC
Car: 1990 Camaro RS
Engine: 5.0L
Transmission: WC T5 5-speed
Axle/Gears: 3.42
Re: What does my plug tell you?
Looks good to me.
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