Corrosion on 1 spark plug, other 2 find. Need thoughts/advice

[Dirk Diggler]

Inuvik might be more righter. The coil might be weak.

Just had it replaced in 2019 too

[inuvik]

This certainly looks like a weak spark / grounding issue on that plug. It might be a different cylinder than the one that was previously replaced or the replacement went bad. You have a lot of heat and humidity in the south which will find any "weak spots" and cause havoc.

[Dirk Diggler]

Boot didn't look bad at all according to my mech friend, I'm going to do a hwy test tomorrow and see whats up. Probably do a compression test too. At least I got those fresh plugs in there, power felt better too but that could just be in my head.

[Mark]

Boot didn't look bad at all according to my mech friend, I'm going to do a hwy test tomorrow and see whats up. Probably do a compression test too. At least I got those fresh plugs in there, power felt better too but that could just be in my head.

Replacing a spark plug boot on a Mirage -

https://www.youtube.com/watch?v=aTtMqlzsgrI

I would replace the spark plug boot for the spark plug that looked green. It's a cheap item to try first.

Rockauto.com only has one left currently -

https://www.rockauto.com/en/catalog/...lug+boot,10150

[Dirk Diggler]

Replacing a spark plug boot on a Mirage -

https://www.youtube.com/watch?v=aTtMqlzsgrI

I would replace the spark plug boot for the spark plug that looked green. It's a cheap item to try first.

Rockauto.com only has one left currently -

https://www.rockauto.com/en/catalog/...lug+boot,10150

I'll order another then. We checked the original and it seemed fine, no cracks or anything. I'll find out more when I do my highway test to see if I can get better mpg.

[Mark]

I'll order another then. We checked the original and it seemed fine, no cracks or anything. I'll find out more when I do my highway test to see if I can get better mpg.

It's a cheap item. It's just a suggestion on my part. I may just replace the three spark plug boots when I do my spark plugs. Rockauto makes that recommendation when ordering the OEM NGK spark plugs for a Mirage.

[Eggman]

Hey Dirk is this the original engine?

[Fummins]

It's a cheap item. It's just a suggestion on my part. I may just replace the three spark plug boots when I do my spark plugs. Rockauto makes that recommendation when ordering the OEM NGK spark plugs for a Mirage.

I've never bothered replacing a boot on these cars. They don't stick to the spark plugs and the chances of damaging one upon removal is slim to none. An out of town independent shop claimed a car needed plug boots, I got the old ones back. No signs of damage, I just put them back on the engine I robbed them from.

[Mark]

I've never bothered replacing a boot on these cars. They don't stick to the spark plugs and the chances of damaging one upon removal is slim to none. An out of town independent shop claimed a car needed plug boots, I got the old ones back. No signs of damage, I just put them back on the engine I robbed them from.

I get all that, but he has one plug that looked totally different than the other two.

[Pryme]

I'll say weak coil.