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4.6L General Discussion This section is for non-tech specific information pertaining to 4.6L (Modular) Mustangs built from 1996 to 2004.

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Old 07-14-2014, 09:08 AM   #1
mustangdad68
 
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Join Date: Jul 2014
Vehicle: 2000 Ford Mustang GT
Location: Michigan
Posts: 1
Default Running Too Rich

My son and I have been fixing up a 2000 Mustang GT Convertible for several years. We originally started out with a 1998 Mustang GT coupe. But the body was not worth repairing. We found a 2000 Mustang GT Convertible body that was in excellent shape. I did some research and discovered the '98 4.6L engine was compatible with the 2000 body. So we removed the '98 engine and rebuilt it. It has your typical performance upgrades such as a performance intake manifold, K&N air filter system and the replacement of the A/C pump with a dummy pulley. Nothing fancy. We put it in the 2000 body. But it didn't run with the 2000 ECU. So we experimented with replacing the 2000 ECU with the 1998 ECU. It ran! But the speedometer and ABS didn't work. It also ran very rich. You can smell gas quite strongly from the exhaust. I have been everywhere on the internet and mechanic shops looking for answers as to how to get the speedometer working and get it running leaner. Does anyone out there have any experience with this sort of Frankenstein experiment? Do we just need to flash the ECU? I am up for anything at this point. It's a great car. It's really fast and fun to drive! Thanks for your help in advance.
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Old 07-14-2014, 09:08 AM
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