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

P0171 FREAKIN HELP

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Old 02-10-2016, 10:26 PM
  #11  
Drastang
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I had 3 coils go bad at one time..... and when the ******** changed my clutch they switched my 02 sensors to wrong ports I was told...they appear to be switched on the computer.


and WJL .. I would love to do the used vortech but both the shops in my area refuse to even give me a dyno on a used unit so I'm just going to go slam my head in the hood ... but honestly I got 3.3k to spend after new NEW clutch and 4.10 rear and no one to freaking help me spend it!!!
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Old 02-10-2016, 10:30 PM
  #12  
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honestly think I have blue ***** .......
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Old 02-10-2016, 11:52 PM
  #13  
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Now my 3rd shop that doesn't mind used units ... wouldn't even let me bring my car in after I said it had 140k miles so guess i'ma sit here and give up
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Old 02-12-2016, 06:22 PM
  #14  
WhiteFoxGT
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what?
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Old 02-12-2016, 10:45 PM
  #15  
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You're trying to mod a high mileaged car.
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Old 02-13-2016, 09:36 AM
  #16  
Drastang
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all good 4.7 900hp kit in the mail just gonna throw a comp cam in it,4.10 and 400hp clutch. then throw trickflow on it next year and the year after that skip the supercharger and go turbo.....*gizz*

Last edited by Drastang; 02-13-2016 at 09:39 AM.
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Old 02-13-2016, 03:29 PM
  #17  
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really crazy how hard and to what extent I went to get local help from ford racing endorsed shops around me and I make one call on the other side of the continent and bam all my issues fixed in 5 mins ... just a load of shipping but well worth it. MMR FTW
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Old 02-13-2016, 07:20 PM
  #18  
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Drastang, go find a tech school near you, go meet the instructor they might take you car on as a project.
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Old 02-20-2016, 10:23 PM
  #19  
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sound like a vaccume/intake leak take carb cleaner spray around your intake manifold and vaccume lines if theres a leak the rpm will jump then one you find the general area spray individual spots until you find the exact location but if i had to guess your manifold cracked
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Old 02-29-2016, 07:00 AM
  #20  
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I fixed this issue the cheap way IAC and EGR delete =) my car no longer run lean or rich and no early morning fog.... =) and it sounds beastly I mean really throaty love it. also set my idle to 800 rpm, a/c run fine starts great it was 35 degrees over the weekend here and it took 8 sec for the motor's idle to come up but after the initial warm up it ran fine even with heat =)
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