C5 Corvette LS1 - plug #3 fouled?
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Teching In
Joined: Apr 2012
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C5 Corvette LS1 - plug #3 fouled? Long time lurker, infrequent poster. Way more active on CorvetteForum, but I feel like this is an LS1Tech question.
Motor has ~95k on it. About 7k since cam swap.
Car has TSP Torquer V4, long tubes, stock 241 heads, regular LS1 PCV system, and no catch can.
At a recent track day, a buddy told me the car was smoking. He said it was gray smoke.
I pulled the plugs to take a look and this is what I found: https://imgur.com/a/lYgXLeO
I'm thinking maybe the valve seals on that cylinder? I replaced them when I did the springs. One other buddy suggested swapping the fuel injector from #3 to another cylinder and seeing if the darkness follows it.
Suggestions and insight welcome.
Motor has ~95k on it. About 7k since cam swap.
Car has TSP Torquer V4, long tubes, stock 241 heads, regular LS1 PCV system, and no catch can.
At a recent track day, a buddy told me the car was smoking. He said it was gray smoke.
I pulled the plugs to take a look and this is what I found: https://imgur.com/a/lYgXLeO
I'm thinking maybe the valve seals on that cylinder? I replaced them when I did the springs. One other buddy suggested swapping the fuel injector from #3 to another cylinder and seeing if the darkness follows it.
Suggestions and insight welcome.
I immediately thought valve seal on No. 3 so yeah those are some really good suggestions. Might want to try the injector swap first to see if it follows and you could also perform a compression and leak down on that cylinder to make sure your still getting a good seal.
Thread Starter
Teching In
Joined: Apr 2012
Posts: 9
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Did the injector swap tonight. I'm off on Thursday so I'll drive it around a bit and see what's up. I figure if it follows, I found the issue. If not, compression test time.
Seems odd to have rings go bad on one cylinder though, right? I suppose anything can happen though.
I used those one piece valve seals that came with the TSP cam, if that matters.
Seems odd to have rings go bad on one cylinder though, right? I suppose anything can happen though.
I used those one piece valve seals that came with the TSP cam, if that matters.
Did the injector swap tonight. I'm off on Thursday so I'll drive it around a bit and see what's up. I figure if it follows, I found the issue. If not, compression test time.
Seems odd to have rings go bad on one cylinder though, right? I suppose anything can happen though.
I used those one piece valve seals that came with the TSP cam, if that matters.
Seems odd to have rings go bad on one cylinder though, right? I suppose anything can happen though.
I used those one piece valve seals that came with the TSP cam, if that matters.
Thread Starter
Teching In
Joined: Apr 2012
Posts: 9
Likes: 1
Well - update:
Swapped the injector from #3 over to #2 and vice versa. Put a new plug in #3.
Drove it to work and back yesterday. Checked the plugs this morning since I'm off.
#3 is good:
And #2 is not:
Swapped the injector from #3 over to #2 and vice versa. Put a new plug in #3.
Drove it to work and back yesterday. Checked the plugs this morning since I'm off.
#3 is good:
And #2 is not:
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Thread Starter
Teching In
Joined: Apr 2012
Posts: 9
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Yeah no kidding. That was my tuner friend.
I wouldn't have even considered that. New one on the way - and of course, since nothing ever goes to plan, I broke a plug wire, so a new set of those is on order, too.
I wouldn't have even considered that. New one on the way - and of course, since nothing ever goes to plan, I broke a plug wire, so a new set of those is on order, too.
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