4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.

Smog Check Help

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Old 01-10-2012, 08:48 AM
  #1  
CBRKNIGHTRIDER
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Default Smog Check Help

I barely passed my last smog test, and now I am up for another one next month. Since my last test I have installed Accel super coil packs and got a predator tune for 87 octane done. I already got a new set of NGK G-Power Platinum, a bottle of injector cleaner, and I am planning on cleaning and oiling the K&N filter. My question is will I be able to pass smog test with a Predator tune installed or will I have to rest the ECU back to factory specs? Any help and advice would greatly be appreciated.
( if its helps the car has 113,000 miles, K&N I Fipk Cold air intake, BBK Shorty header, stock mid pipe with cats, flower masters, and I live in cali)
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Old 01-10-2012, 09:29 AM
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Matt's 95 Stang
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Why did you almost NOT pass last time? I have no problems passing with all the crap Ive done to my engine. You have Cali legal headers, still have your cats, dont have a new cam/heads/or intake. Where your smog readings to high?

Matthew
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Old 01-12-2012, 12:12 AM
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CBRKNIGHTRIDER
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Originally Posted by Matt's 95 Stang
Why did you almost NOT pass last time? I have no problems passing with all the crap Ive done to my engine. You have Cali legal headers, still have your cats, dont have a new cam/heads/or intake. Where your smog readings to high?

Matthew
I'm not sure why it barely passed, it was just what the guy who did my test told me. I'm just gonna take the tune off and run 91 octane for the rest of the time before my test. Hopefully it will pass first try.
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Old 01-12-2012, 05:25 PM
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Z28KLR
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Just went through CA emissions testing a week ago, and yes you will need to reflash back to stock.
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Old 01-13-2012, 10:12 PM
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ZeroTX
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If the computer shows any codes, you should be able to find out exactly what the problem is... If it's barely passing, then you should find out why, as it's probably wasting gas and losing power.
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Old 03-11-2012, 01:25 PM
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sixxstringgod
 
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Default smog probs. 96 gt

Ok guys i been searching for answers to my question for a few days now cant find anything. I gotta 96 gt with a mac straight shot CAI, c&l upper intake plenum, bbk 70 mm tb, new plugs & wires, fresh oil, clean filter (air & oil) , bbk off road h pipe with universal high flow cats from summit and a bbk cat back.
I just bought the car last year now the tags are up in april and i went to smog it and it failed with high hydrocarbons. Everything else passed. The hcs were at 95. I cannot tell much of the test cuz im a otr driver and my friend is handling business for me while im gone. He just told me it failed. Anyway a lil history is i bought the car from my cousin so because he is family it was a relative sale meaning i didnt have to smog upon purchase. It came with a headache but its ok cuz i wanted the car no matter what. The headache was a cel P0171, P0174 system too lean bank one bank two. I chased that for a while and replaced the fuel pressure regulator as it was a bbk adjustable and the gauge was showing inaccurate readings so i just put the stock one on. Then i replaced the front o2 sensors, iac valve, replaced some broken vac lines and finally it was a faulty maf that was the prob. It was new but faulty and i had cleaned it. But anyways i got a new maf and goodbye codes. No i thing i have noticed is a bubbly or burbly sound at around 15-800 rpms on deceleration, no popping however. And once in a great while i will clme to a stop sign and my rpm will hang at like 1200 for about 3 seconds then drop.
I talked to my cousin he said he passed with the o/r h pipes after he put those hi flow cats on he passed 3 times...but that was before the cel condition. He gave me the original 6 cat stock exhaust as i thought maybe that will help me pass. Tomorrow we will find out. So does anyone have any ideas of anything? I could use the help, i just wanna pass so i can tag me car n go to fabulous fords this year.
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