Why would one cylinder run lean?
Thread Starter
Launching!
Joined: Nov 2001
Posts: 203
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From: Chesapeake, VA
Why would one cylinder run lean? I had the spark plugs out for inspection today. #2-8 all looked good with a slight brown coating. #1 was clean as a whistle, no discoloration at all. I am thinking that #1 (being white) was running lean. This would explain why the engine feels a little off balance and the slight pinging I hear at low RPMs. Maybe just one cylinder is running lean? What would do this? Is there anything that I can do to check/clean the fuel injectors (now running some used SVO 30# injectors that I bought used from a guy on LS1.com). Any help would be greatly appreciated.
-Kris
-Kris
TECH Apprentice
Joined: Dec 2001
Posts: 351
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From: CA
Re: Why would one cylinder run lean? [quote]Originally posted by 99WhiteSS:
<strong>I had the spark plugs out for inspection today. #2-8 all looked good with a slight brown coating. #1 was clean as a whistle, no discoloration at all. I am thinking that #1 (being white) was running lean. This would explain why the engine feels a little off balance and the slight pinging I hear at low RPMs. Maybe just one cylinder is running lean? What would do this? Is there anything that I can do to check/clean the fuel injectors (now running some used SVO 30# injectors that I bought used from a guy on LS1.com). Any help would be greatly appreciated.
-Kris</strong><hr></blockquote>
If you suspect it's the injectors, but not sure, why don't you swap the injector to another cylinder and see if the problem reoccurs on that cylinder. If so, I would send them to get cleaned up and balanced.
<strong>I had the spark plugs out for inspection today. #2-8 all looked good with a slight brown coating. #1 was clean as a whistle, no discoloration at all. I am thinking that #1 (being white) was running lean. This would explain why the engine feels a little off balance and the slight pinging I hear at low RPMs. Maybe just one cylinder is running lean? What would do this? Is there anything that I can do to check/clean the fuel injectors (now running some used SVO 30# injectors that I bought used from a guy on LS1.com). Any help would be greatly appreciated.
-Kris</strong><hr></blockquote>
If you suspect it's the injectors, but not sure, why don't you swap the injector to another cylinder and see if the problem reoccurs on that cylinder. If so, I would send them to get cleaned up and balanced.
