1994-2004 V-6 3.8 and 3.9L V6 Mustangs

Severe problem! Tried everything and need help

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Old 11/11/13, 09:33 PM
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Severe problem! Tried everything and need help

Hey guys I've been having a big time problem with my motor lately. It's chugging real hard when I drive acts as if its going to die. Hooked up to a laptop it tells me that my long term fuel range is 0 and my short term fuel range is maxed out so it's severely dumping gas. I replaced my o2 sensors and my upper intake gasket so far but I have no idea what else to do now. If you have any idea let me know. Thanks.
Old 11/12/13, 06:22 AM
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Is it stock or do you have mods on it?
Old 11/12/13, 06:25 AM
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It's stock with an aftermarket cold air intake
Old 11/12/13, 08:24 AM
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What year is it? The 1994-97 V6s were notorious for blowing head gaskets. Have that checked out.
Old 11/12/13, 08:56 AM
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Originally Posted by rodsoccer2
Hey guys I've been having a big time problem with my motor lately. It's chugging real hard when I drive acts as if its going to die. Hooked up to a laptop it tells me that my long term fuel range is 0 and my short term fuel range is maxed out so it's severely dumping gas. I replaced my o2 sensors and my upper intake gasket so far but I have no idea what else to do now. If you have any idea let me know. Thanks.
You have a stopped up catalytic converter. It is one of the light off cats just below the header. My daughter in law had the same problem with her V6 (we thought we would never figure it out).

I took the car to a muffler shop that "specializes" in fixing stopped up cats. The next day I picked up the car....no more stopped up cat, and it ran great!
Old 11/12/13, 02:01 PM
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It's a 98 mustang, we don't think it's a cat issue though because they don't rattle and we have no codes on at all.
Old 11/12/13, 02:14 PM
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Something to check. I had an issue with the pig tail in the wiring harness that went to the crank positioning sensor breaking down and shorting itself out when I hit bumps. Check you wires see if there is any break down could be a problem there.
Old 11/12/13, 02:18 PM
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Seems silly, but haven't seen anyone else mention it, but have you cleaned the MAF?
Old 11/13/13, 06:20 AM
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have you googled (long term fuel range is 0 and my short term fuel range is maxed) I did
Old 11/13/13, 01:32 PM
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We fixed it, I had a bad motor mountains when I hit the gas the motor would moved 4-5 inches and it was causing the Volos air intake to pull off the throttle body so the air was leaking in there and causing the O2 sensors to dump more and more gas which caused it to majorly chug. Thanks for all the suggestions!
Old 11/13/13, 04:19 PM
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Glad you got it rectified.
Old 12/2/13, 12:47 PM
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