Header Leak --> Lean Condition?
02-16-2002, 08:32 PM
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Header Leak --> Lean Condition? I am still battling a slight pinging problem with my car. Mostly during low RPM tip-in on the throttle. I have ordered an SLP manual fan switch, an SLP increased-cooling radiator, and some water wetter which I will add to an 85%/15% (water/glycol) mixture. I am hoping this will show lower operating temps by 15-20 degrees over what I have now.
Next suspect...header leak. I have also purchased new GM manifold gaskets (the stock metal crush-type) and new Stage 8 locking bolts. Can a header leak allow enough unspent oxygen to escape detection by the O2 detectors to cause a lean condition? That's the big question. Does anybody have a definitive answer on this?
Thanks guys. <img src="graemlins/gr_hail.gif" border="0" alt="[hail]" />
-Kris
Next suspect...header leak. I have also purchased new GM manifold gaskets (the stock metal crush-type) and new Stage 8 locking bolts. Can a header leak allow enough unspent oxygen to escape detection by the O2 detectors to cause a lean condition? That's the big question. Does anybody have a definitive answer on this?
Thanks guys. <img src="graemlins/gr_hail.gif" border="0" alt="[hail]" />
-Kris
02-17-2002, 09:56 AM
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Re: Header Leak --> Lean Condition? I may be wrong but I was under the assumption that an exhaust leak forward of the 02 actually caused a rich condition. Thats how it happened on my 96 S-10. Finally fixed the leak and SES light went out and I picked up 3-4 MPG.
02-18-2002, 12:33 AM
#3
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Re: Header Leak --> Lean Condition? It'll cause the PCM to *THINK* there's a lean condition that really isn't there which in turn will make for a rich condition since the PCM will be adding fuel.
