Author Topic: Read my Plugs (Read 3633 times)

badboypolar · « **on:** August 21, 2007, 12:01:27 PM »

So I went to do a compression test, just to be sure everything is okay. Look at my spark plugs. I know something isn't right but I can't remember what it means. Either I am not using a high enough octane, though I'm using 91, or my plugs are too hot or cold.

bmwman91 · « **Reply #1 on:** August 21, 2007, 12:24:30 PM »

I am not sure about the plugs...but what camera are you using?!?!

badboypolar · « **Reply #2 on:** August 21, 2007, 03:25:44 PM »

It's a Nikon D50 DSLR. Using a Nikor 24-120mm, 72mm lense.

The lense makes all the difference. The camera is awsome, but the lense is what really got those shots.

biljak · « **Reply #3 on:** August 23, 2007, 06:40:01 PM »

i have a similar problem, but only on the 4th cylinder (closer to the cabin). i have to clean (sandbrush?) the plug every couple thousand miles and it runs fine after that. i heard that these things can build up on the spark plug because the oil burns inside the cylinder. never did give it too much attention dough...

kowalski · « **Reply #4 on:** August 24, 2007, 01:30:14 AM »

white means your running lean does it not?

D. Clay · « **Reply #5 on:** August 24, 2007, 12:15:03 PM »

Quote from: biljak;32317

The top electrode looks a little closer than the bottom one and is getting hotter. It is eroded more also. Oil getting into cylinder. Regap and swap coils to see if problem moves to another cylinder.

D. Clay · « **Reply #6 on:** August 24, 2007, 12:20:33 PM »

The inside back cover of a Hayne's Repair manuals has very good pictures of common plug conditions

rhogg · « **Reply #7 on:** August 24, 2007, 07:03:13 PM »

As does the web. One of many: http://www.beru.com/english/produkte/zuendkerzen/diagnosehilfe.php

Yours don't look bad, but well aged. How many miles on them?

silverblades181 · « **Reply #8 on:** August 24, 2007, 07:28:20 PM »

Quote from: rhogg;32391

As does the web. One of many: http://www.beru.com/english/produkte/zuendkerzen/diagnosehilfe.php

Yours don't look bad, but well aged. How many miles on them?

They don't look that bad, maybe running a little lean.

kowalski · « **Reply #9 on:** August 26, 2007, 02:27:04 PM »

Quote from: D. Clay;32356

The top electrode looks a little closer than the bottom one and is getting hotter. It is eroded more also. Oil getting into cylinder. Regap and swap coils to see if problem moves to another cylinder.

the spark only comes of one side of the plug, the closer side. Path of least resistance.

badboypolar · « **Reply #10 on:** August 27, 2007, 01:09:06 PM »

There are about 1,700 miles on those plugs.