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Maintenance, Troubleshooting and Diagnosis Need help? Having troubles with your GT? Need some maintenance tips? Ask your questions here.

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Old 12-13-2015, 10:42 PM   #1
Robbie
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Default Carb help

I need a carb pro. I know very little about carb mustangs since most of mine were post 85 models. But I bought a sweet 85 vert with 34 K on it. I had the carb rebuilt by a trusted mechanic. Here's the only mods I've done. Long tubes, off road, no cats. Hotter coil, Ford Racing plug wires.
I have a fuel smell, not real strong but I'm concerned. It was there before the carb rebuild. The car runs wonderful, smooth as silk all around. But the smell will not go away. The gas tank is solid no leaks there or any fuel lines.
I understand the computer controls the air/fuel and any adjustment screws are covered from the factory. Could it be dumping too much fuel since I've removed the cats and added the off road exhaust? Lastly would a new holley. 4160 bolt right on? Would I have to bypass the computer? Forgive the length of this post. Thank you for any help,
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Old 12-14-2015, 10:06 AM   #2
KS 82 GT
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Do you smell it when you're driving or when it's parked? When it's parked, you're going to get some fuel smell as long as there's fuel in the carb. Not a strong smell, but whiffs of gas. If you're smelling it as you drive, you most likely have a leak somewhere. I'd get a flashlight and trace your fuel lines all the way and look the carb over real close. If you're smelling it in the exhaust, then it's probably running rich. It could be the metering or the choke could be sticking or out of adjustment. There's also a possibility of getting an internal passage clogged inside the carb, but if you have a clean fuel system and have the filters in place, that's not that likely.

I've now told you everything I know about carbs.
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Old 12-14-2015, 10:27 PM   #3
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The carb is freshly rebuilt. The gas smell is definitely after it is parked especially overnight in the garage. While driving it is rarely noticeable. I'll check the fuel lines again just to rule that out. Thanks
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Old 12-14-2015, 10:27 PM   #4
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The carb is freshly rebuilt. The gas smell is definitely after it is parked especially overnight in the garage. While driving it is rarely noticeable. I'll check the fuel lines again just to rule that out. Thanks
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