2.5t Spark Plug Replacement

[dasaint]

Completed the replacement of the original spark plugs with factory OEM.

 

[JSolo]

Hard to tell condition of old plugs with the blocks in the background. Take a pic of them against a solid (preferably white) background. Normally the condition of the tips and surrounding insulator is an indicator of condition.

Color looks adequate for 24K miles. Would think they'd be a lighter color. Suppose with the turbo this is expected. Can't tell condition of tips.

 

[dasaint]

Here are additional pics. With all my vehicles that I've owned that had turbo engines, I usually replace them earlier as I tend to keep my vehicles longer. Per the Kia Stinger manual, they recommended changing out the spark plugs every 48k miles. Changing out them earlier, for me, gives me peace of mind.... easy 15mins.

 

[Volfy]

Those old plugs look to be in excellent form. Electrodes look relatively sharp and insulators very clean.

 

[dasaint]

Here are additional pics. With all my vehicles that I've owned that had turbo engines, I usually replace them earlier as I tend to keep my vehicles longer. Per the Kia Stinger manual, they recommended changing out the spark plugs every 48k miles. Changing out them earlier, for me, gives me peace of mind.... easy 15mins.

View attachment 83982View attachment 83983

Agree that the original plugs look in good shape. However, after installing new plugs and driving for a few miles.... there is a noticeable difference in response, acceleration, etc. It's like it woke up my the 2.5t engine. LOL! At least, I had a larger grin on my face while driving with the new plugs . Cheers, all!

 

[JSolo]

Placebo effect?

You sure you're not just giving it more throttle? Replacing plugs as maintenance items on past vehicles I never noticed any difference in driveability unless the plugs were excessively worn.

On an older bike, I replaced plugs too late. It used a strange dual electrode plug - ngk cr9ek. The bike actually ran reasonably well, but was a whore to start when hot. I can't remember what the mileage was on the plugs, but do recall they were in for a number of years. Those removed did not look anything like the pic below, with excessive wear on the center terminal and side electrodes.

Did you have your battery disconnected when doing them? If so, it's likely the ecu got reset, reverting to a predefined base settings.

 

[AWDGT2]

Do you need any other mods to be pumping e? Or is it as long as youve got the jb4 in the correct map its fine to run? is there a noticeable difference in power between map 2 on 93 and map 3/4 on e30?

There is a huge difference between Map 2 93 and Map 4 with E30. I did install the Fuel it sensor on the 2.5 so I know exactly what I'm putting in. The car totally wakes up! I have a pretty tuned 3.3 and I will tell you, this 2.5 is at the 3.3 stock level right now. Reminder... I did put plugs in the 2.5 that are one step solder and gapped down to .025.

 

[Volfy]

I was gonna swap in the NGK ILKR9Q7G over the holidays, along with a bunch of other mods, but I decided to keep the stock plugs for now. As long as they work well, might as well put some more miles on the stock plugs and used them up good. I'm not too concerned about the NGK ILKR9Q7G been too cold, since the weather around here doesn't get too cold very often. I'm much more worried about the brutally hot Summers, when the engine can get plenty toasty, especially with JB4 engaged.