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Old 10-10-2012, 10:50 PM   #1
BowenSS1
 
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GLOWING RED HEADERS AT IDLE

Just as the title states....I noticed tonight while hood was up car idleing for less than 5mins....the 5,6,7,8 are glowing red I never noticed that before...could there be a problem...Thanks
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Old 10-10-2012, 10:52 PM   #2
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Mods are bolt ons with Maggie cam stall
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Old 10-11-2012, 04:48 AM   #3
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was it just after some very hard driving?

what type of headers, CATs, and how much boost are you running.

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Old 10-11-2012, 04:49 AM   #4
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Headers get dang hot and add allot of under hood heat. Common for them to glow. You just notice more in the dark if the hood is up.
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Old 10-11-2012, 05:15 AM   #5
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do you monitor your AFR? the rear cylinders generally run leaner than the fronts, just wondering if too lean can cause this condition and therefore your headers are running hotter.
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Old 10-11-2012, 06:31 AM   #6
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There was no hard driving before hand.. it hadn't even been turned on all day....
Im running big flow exhaust 1 7/8 headers,no cats ,9LBS boost.
I do not have a/f gauge or boost gauge
I just thought it was strange to get that hot in less than 5 mins ...
Hell it melted the plastic protector over the Maggie water line on passenger side.
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Old 10-11-2012, 10:52 AM   #7
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maybe some sort of blockage although I don't know what it could be since there are no cats. Pretty odd for them to glow without being ran hard
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Old 10-11-2012, 10:58 AM   #8
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Cam dumping lots of raw fuel in the exhaust at idle, burning off in the headers? Do your eyes burn from the exhaust?
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Old 10-11-2012, 11:21 AM   #9
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Quote:
Originally Posted by BowenSS1 View Post
9LBS boost, I do not have a/f gauge or boost gauge
Gauges would deff be my next mod
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Old 10-11-2012, 11:39 AM   #10
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What causes that is (1) a lean fuel mixture, (2) timing retarded too far at idle or a combo of both. Usually I have seen one side or the other glowing red, but never 2 cylinders on one side and 2 on the other side. Basically what's happening is there is not enough fuel in the chamber to cool it when it's lean or the timing is too far retarded and then combustion is happening too late and raw fuel gets pumped out the exhaust. Let us know what you find
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Old 10-11-2012, 06:13 PM   #11
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Called tuner they said drive car around then park and pop hood and check
If they are red.... well I did.....car runs great when i get home i leave car running pop hood
And headers are fine....but once it starts lopeing they turn red again....
so i will let them know Fri. See what they say...??
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Old 10-11-2012, 07:46 PM   #12
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Another thing to check is to use an IR meter, one that goes up to 1000 deg F. I am running a whipple and across the board my header temps at idle are between 425 and 470deg on all eight cylinders, check the temp at all pipes
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Old 10-12-2012, 01:03 PM   #13
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Lean
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Old 10-12-2012, 02:13 PM   #14
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I think every aftermarket supercharged car needs an AFR gage on a wideband O2. Without being able to monitor that AFR everybody is just guessing. I'd get it back to the tuner, work on the tuning, and install an AFR gage.
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Old 10-12-2012, 03:44 PM   #15
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Any car will build engine heat just sitting there idleing. Try it with any car that has a water temp gauge.
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Old 10-12-2012, 07:28 PM   #16
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Alright called the tuner and let them know about driving the car then letting it idle
They said they will take a look at the tune...
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Old 10-13-2012, 03:10 PM   #17
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Could have been in converter heat up mode
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Old 10-13-2012, 03:32 PM   #18
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wouldn't heat up mode cause all of the headers to heat up more evenly vs just the 2 rear? and can the rear O2 sensor/heaters create that much heat? (just asking because i don't know)
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Old 10-15-2012, 01:56 PM   #19
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clogged cat?
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Old 10-16-2012, 02:16 PM   #20
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Vacuum leak could be the culprit. I had a truck do this same exact thing after installing an intake manifold. Found the leak with the use of soapy water in a spray bottle.
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Old 11-09-2012, 01:49 PM   #21
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This issue was solved...it was timing
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Old 11-09-2012, 03:41 PM   #22
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Good to see that the car is straightend out!

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