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Old 07-04-2004, 12:59 AM
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Header paint burns funny during start up

with a stock Qjet and a performer spread bore. i am wondering why the back two headers on the passenger side got hot enough to burn off the paint, while on the drivers side the front two burned it off during cam break in. i know they are lean if they are hot, just wondering if that is a quadra-junk thing, or what? i'll check back next weekend. i'm goin ta naishville, Ding this 30% chance of thunderstorms every day of the week. couple years back they sent me to miami: thunderstorms every day but the first. why cant they check the weather before the decide where the hell they send me. dont they think i see enough rain in seattle? hope y'all have/hadda great and safe 4th

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Old 07-04-2004, 01:11 AM
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Sounds more like you dont know how to adjust that "Quadrajet", or jet it properly

Just kidding.

But seriously if you feel the car is running lean, then you need to check it, and adjust the idle mixture screws, or start playing with the secondary hangers/needles among other things. Having an O2 sensor makes this task a thousand times easier.

This is where the CCC-Qjet really starts to shine.
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Old 07-04-2004, 02:14 AM
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The secondary needles and hanger donīt do anything at idle,
turn the mixture screws full in then out two turns and put a vacuum gauge on it. Adjust for max vacuum,adjust the idle screw on the side as well and that the primary throttle blades are not open too wide at idle, just uncovering the transfer slot.
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Old 07-04-2004, 10:11 AM
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Re-check your timing. If is is retarded the pipes will get very hot (even glow) and your engine will also run hotter than normal.

Vacuum leaks and/or a lean condition will also cause the symptoms you describe.
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Old 07-19-2004, 04:24 PM
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first off, remember i said "during cam break in" therefor idle circuits were not involved, not at 2000+ rpm. anyway i did drive it to the body shop where their engine guy said he thought it sounded like i hadda vacuum leak. i dont know diddly SQUAT about quadrajets. i do have a vac guage i could put on it if i have to after he's done with it. i'll get it back again in a month or so. thanks tho, hope your 4th's were great
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