Could someone read my plugs for me?
Could someone read my plugs for me? Plugs are stock AC Delco's for an '04 Z06.
They have been in my '99 Z28 for 20K miles.
My Camaro is N/A only, never been sprayed.
I am not exactly sure what else you might need to know, but if I am missing something, let me know and I will post it up.
From what I can tell right now, the plugs look like they are saying that the idle tune is too rich or fat.
I apologize in advance for the crappy pictures.
Thanks.
They have been in my '99 Z28 for 20K miles.
My Camaro is N/A only, never been sprayed.
I am not exactly sure what else you might need to know, but if I am missing something, let me know and I will post it up.
From what I can tell right now, the plugs look like they are saying that the idle tune is too rich or fat.
I apologize in advance for the crappy pictures.
Thanks.
White crystalline deposits are usually coolant contamination, that pic w/ 3 plugs all 3 appear to have them.
Time for a cooling system pressure test (free tester via AutoZone loan-a-tool). The cooling system test is very quick 'n easy, just click the test fixture onto your radiator in place of the cap and pump it up to whatever your cap pressure is...usually 16psi. It should hold that pressure for several minutes with zero drop.
If it passes that test, it's time for a cylinder by cylinder leakdown test.
The pic on the far left looks like a very rich fuel mixture.
Time for a cooling system pressure test (free tester via AutoZone loan-a-tool). The cooling system test is very quick 'n easy, just click the test fixture onto your radiator in place of the cap and pump it up to whatever your cap pressure is...usually 16psi. It should hold that pressure for several minutes with zero drop.
If it passes that test, it's time for a cylinder by cylinder leakdown test.
The pic on the far left looks like a very rich fuel mixture.
It's probably not as useful a tool as it was back before closed-loop computerized fuel management, but many engine problems still show up in the combustion chamber. Plugs are easier to remove than heads.
True, easy to find major problems, hard to tune an engine. I've only dealt with 2 strokes. And getting a plug reading on a 2 stroke is next to impossible. Better to use piston wash. But I know, this is 4, but still thought it was next to impossible.
Anyway. Just throwing it out there and trying to learn at the same time.
Anyway. Just throwing it out there and trying to learn at the same time.
Same here, I was an OMC Master Tech way back when and aside from diagnosing gummed carbs and overmixed fuel:oil the plugs weren't much use.
The white specs on the three plugs the guy posted are a likely indicator that things aren't right.
The white specs on the three plugs the guy posted are a likely indicator that things aren't right.
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White crystalline deposits are usually coolant contamination, that pic w/ 3 plugs all 3 appear to have them.
Time for a cooling system pressure test (free tester via AutoZone loan-a-tool). The cooling system test is very quick 'n easy, just click the test fixture onto your radiator in place of the cap and pump it up to whatever your cap pressure is...usually 16psi. It should hold that pressure for several minutes with zero drop.
If it passes that test, it's time for a cylinder by cylinder leakdown test.
The pic on the far left looks like a very rich fuel mixture.
Time for a cooling system pressure test (free tester via AutoZone loan-a-tool). The cooling system test is very quick 'n easy, just click the test fixture onto your radiator in place of the cap and pump it up to whatever your cap pressure is...usually 16psi. It should hold that pressure for several minutes with zero drop.
If it passes that test, it's time for a cylinder by cylinder leakdown test.
The pic on the far left looks like a very rich fuel mixture.
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