car dies after changing exaust manifold

2000 FORD MUSTANG
6 CYL • MANUAL
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SAMUTAI77
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hi , i have a 2000 ford mustang v6 , after changing the exaust manifold and gaskets i start it and the rpms go up and down (1500 to 500 rpms) then my air intake starts making howling noises like gasping for air also a strong smell of gas comes out , i already check all my sensors (maf,tps, iac, iat,egr even the air pump and charcoil canister) they all good they read properly oms and i have their respective voltage on their plugs, i changed all vacuum hoses and gas filter. i also disconnect the catalytic converter to make sure i did not have any obstruction and still have the problem , i put a obd scan and nothing came out , i dont know what could it be , any help ill apreciate thanks
Feb 2, 2011 at 3:31 PM
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DOCFIXIT
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Check EGHR tube connection on right manifold tight no leaks? also did all bolt holds line up? what was reason for replacement?
Feb 2, 2011 at 4:50 PM
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SAMUTAI77
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i replaced it because the muffler support broke and was hanging only by the exaust manifold and then manifold broke, i put a new exaust manifold and a new egr connection tube, all the holes lined up correctly i took it apart twice and tighten up really good i even bought the original gasket for the manifold coz the one it came with looked really cheap, i am going to check how tight is that egr conecction tube and ill get back with a response thanks in advance
Feb 2, 2011 at 5:10 PM
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SAMUTAI77
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well i checked and re-tight all the bolts for the exaust manifold and egr conecction , i still have the same problem this loud noise coming out of the air intake (it sounds like when you blow air on a coke bottle but louder)my car keep idleing up and down and eventually dies also still smell like gasoline. no luck so far :(
Feb 3, 2011 at 1:18 PM
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DOCFIXIT
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May have damaged EGR and it is open at idle causing flux and smell check out remove see if pential is open.
Feb 3, 2011 at 5:26 PM
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SAMUTAI77
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egr is valve is good i replaced that one 2 months ago i tested is close i checked the egr solenoid as well test good , i already checked all the vacuum and emission sensors all of them visually and with my multimeter ( fluke 725 ) . i checked for leaks from the exaust manifold and have none ( i had my brother blocking the exaust pipe while the car was runnning i was checking at the exaust manifold i used somenthing is call snoop, is use for calibration on transmiters pretty much is destilled water with a mild soap) , im wondering if a defective fuel pump would cause all this headache or maybe the fuel pressure regulator, i hear the fuel pump as soon i start the car , i dont know if the fuel pressure regulator is not regulating.i dont know anymore
Feb 3, 2011 at 8:12 PM
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DOCFIXIT
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Any chance a plug wire got crossed?
Feb 3, 2011 at 9:25 PM
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SAMUTAI77
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Well I finally found the problem it was the egr ,got a cheap brand online and the noise still there then I got one from the dealer noise went away car doesn't idle anymore thanks for your support
Jun 12, 2015 at 9:21 AM
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