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420A Spark plugs okay?

Stizzydrew

Proven Member
96
16
Nov 11, 2021
Los Angles, California
I changed out my spark plugs for new denso spark plugs. Here are some photos of the ones i took out of my car. I have no previous service record so i don’t know how long or how many miles they have. Do they look super bad or is that normal for spark plugs? Should I be worried?
Spark plug 1-4 in order. I took them out the 420a from right to left.
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1990TSIAWDTALON

Moderator
9,708
5,547
Nov 14, 2013
Independence, Kansas
Sparkplug chart

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1990TSIAWDTALON

Moderator
9,708
5,547
Nov 14, 2013
Independence, Kansas
There is quite a bit of buildup on them but, to me, they just look like they have been in the motor for A LONG TIME. Throw a new set in and see if she loves you for it.
 

Stizzydrew

Proven Member
96
16
Nov 11, 2021
Los Angles, California
There is quite a bit of buildup on them but, to me, they just look like they have been in the motor for A LONG TIME. Throw a new set in and see if she loves you for it.
Most probably. Before I got the car the guy had it sitting from 2017 to October 2021. October is when I had the car running and fixed the main issues. Before that the only service record I see that passed emissions and inspection was from 2014 @185,xxx miles. I’m thinking the park plug were from that time because the guy I got the car from didn’t seem to do anything but beat on the car till it broke and sold it to me.
 

1990TSIAWDTALON

Moderator
9,708
5,547
Nov 14, 2013
Independence, Kansas
I wouldn't be surprised. I changed plugs in my 2004 Silverado today, and they looked like yours just not as heavy buildup and I thought to myself, I bet these have never been changed. Burn was good, just some build up and on Iridium Plugs per the Mfgr.
Prepping for a winter storm here in the Midwest.
In MY DSM world, my 90 GSX is over fueling and my 92 TSI is under fueling. They are hating on me currently.
 

Stizzydrew

Proven Member
96
16
Nov 11, 2021
Los Angles, California
I wouldn't be surprised. I changed plugs in my 2004 Silverado today, and they looked like yours just not as heavy buildup and I thought to myself, I bet these have never been changed. Burn was good, just some build up and on Iridium Plugs per the Mfgr.
Prepping for a winter storm here in the Midwest.
In MY DSM world, my 90 GSX is over fueling and my 92 TSI is under fueling. They are hating on me currently.
Ah okay thanks, good luck on the winter storm. And ahaha it seems to always be something with these cars. Love and hate relationship.
 

1990TSIAWDTALON

Moderator
9,708
5,547
Nov 14, 2013
Independence, Kansas
Mine are currently still "hating" on me......
 
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