Thread: brown film on spark plugs
05-06-2013, 07:01 AM #1
brown film on spark plugs
on all 3. Plugs have 3hrs on em. I think it's from fogging with WD-40 and CRC-656 while the engine is running?
05-06-2013, 10:24 AM #2
Pics...need to see em. Brown film could be water, no?
05-06-2013, 11:05 AM #3
05-06-2013, 03:41 PM #4
05-06-2013, 03:49 PM #5
It was just a thought but gas oil water mix usually turns brown...You wouldn't ask if it didn't look like normal correct brown like tuned well. Was it like totally dry cooked on brown or wet or what?
05-06-2013, 05:52 PM #6
dry powder like. Not rust though. I've ran it for about 3hrs, maybe 4 or 5 with the big ass IC installed. I looked at the oil last time and it was pristine. I'll pull the TB pipe and plug the exit line then run it on the trailer tomorrow.
05-06-2013, 06:06 PM #7
05-06-2013, 06:44 PM #8
05-06-2013, 06:48 PM #9
Ya. Almost impossible for us to guess.
Are you running a new setup fuel and charger wise?
Any AFR readings (could be rich)
Could be burning oil
Could be your heavy fogging.
If you haven't changed anything my guess is the fogging.
05-07-2013, 06:48 AM #10
These plugs were ran with the new type 5/51 ext IC and modified 52# injectors. The positive battery terminal came loose and it was running in the low 10s for about 1 minute. Then tuned it in from being real rich on the water. I just switched to a brand new flowed bosch 50s and a 15/20r but have not ran it with the new plugs in. Don't want to until I figure out what this is.
The mark in the top pic on the right plug is where i ran my finger across it. The stuff comes right off.
Inside of the IC charge pipe going to TB. It's clean as hell except for a WD-40 film. If it were leaking salt water wouldn't there be discoloration or something? Salt in there?
Last edited by imp0ster; 05-07-2013 at 09:10 AM.
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