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96 Mustang 3.8 Rough idle, not MAF? Sign up here! Search this forum this category all forums for All words Any words Whole Phrase (search options) Auto Repair Home>> Automotive Repair>> Car Troubleshooting dmahoney New User Jul 25, 2010, 4:35 PM Post #1 of 4 (4388 views) 96 Mustang 3.8 Rough idle, not MAF? Sign In Hello! 96 mustang 3.8. This felt like it happened overnight... A little rough idle at start and giving codes of no 3 cyl misfire and bank 1 and 2 lean... However the plug sparks and a replacement MAF didn't help. Once it runs for 1 minute it seems totally fine. Any ideas? Thank you all!!! Hammer Time Ultimate Carjunky / Moderator Jul 25, 2010, 5:04 PM Post #2 of 4 (4376 views) Re: 96 Mustang 3.8 Rough idle, not MAF? Sign In Look for a vacuum leak. Listen for a hissing noise and try to follow it to it's source. That car is notorious for sucking holes in the rubber vacuum connectors at the manifold, usually connected to the PCV or other large vacuum supply line. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional. dmahoney New User Jul 25, 2010, 8:21 PM Post #3 of 4 (4372 views) Re: 96 Mustang 3.8 Rough idle, not MAF? Sign In sounds good. Ill give it a shot tomorrow. randyj New User Sep 10, 2010, 10:44 PM Post #4 of 4 (4329 views) Re: 96 Mustang 3.8 Rough idle, not MAF? Sign In I'm not really a mustang guy. But i did just have this same problem with my eclipse. It was my idle air control valve, and my intake gaskets. I replaced them and it idles perfectly.   Automotive Repair     Auto Body Repair and Refinishing     Heating or AC Issues     Electrical and Wiring     Brake Systems     Car Stereo Repair Advice     General Discussions     Car Making Funny Noises     Engine Fault Codes     Engine Troubles     Exhaust Systems     Steering and Suspension     Transmission Troubles     Tricks of the Trade Automotive World     General Discussions     Antique Car Talk     Car Shows and Events     The Bargin Bin     Motor Vehicle Inspection     Car Care Tips     Traffic Tickets     Gasoline, Motor Oils, Concept Cars and Engines     Auto Insurance, Financing, Leases, Warranties Truck Repair     General Discussions     Truck Engine Repair     Truck Suspension Repair Motorcycle Repair     General Discussions     Motorcycle Engine Repair CarJunky     Open Posting     Board FAQ's     New Board Suggestions

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