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Old 11-30-2024, 12:35 PM #1
4runherpow 4runherpow is offline
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4runherpow 4runherpow is offline
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4runherpow is on a distinguished road
Spark plug fouler trick - long term?

Hi,

So a couple years back I was battling it out with the p0420 code. Same song and dance - replace some o2 sensors, temporary relief. Using the spark plug fouler trick seemed to work! 2 years later, no codes.

My question though is what are the long term effects of doing this? My assumption is the p0420 code was probably related to a bad cat, so what happens if you keep running on a bad cat?

The reason I ask is because recently I have been getting a fuel smell in the engine bay and some in the cab. I'm looking at replacing the fuel injectors as a precautionary/maintenance item since the truck has 200k.

But could a clogged cat also result in fuel smell at idle? I also have a little tiny lag in power when coasting around 40-60mph when I reapply throttle, it seems like the engine spins up for just a moment before the power kicks in which makes it a bit jerky.

Any thoughts on the long term use of the fouler trick? I probably need to replace my ENTIRE exhaust system but thats likely 3 grand in parts and labor, no?

Thanks in advance -

Last edited by 4runherpow; 11-30-2024 at 12:55 PM.
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