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vacuum leak

  1. 4.6L Tech
    I have a 2002 Mustang GT and it is making an extremely loud high pitched noise noise near the intake manifold. I am throwing the following codes P1506, P0171, P0174, P0316, P0307, and sometimes P0303 and P0300 comes and goes. I thought it was the IAC valve so I replaced it but nothing. Then I...
  2. Classic Tech
    Hey everyone, My 1965 mustang 200 6 cyl has a vacuum leak somewhere. The vacuum lines are all hard lines and there aren't any extra ports to hook up a vacuum gauge. What is the best wait to hook up a vacuum gauge? Also, would anyone suggest converting the hard lines into hoses for easy...
  3. V6 Tech
    After A diagnoses, and code check for my 1999 V6 Mustang I learned that I have a few more problem than i thought. The codes that were found consisted of: P1131 Lack of bank1 02 transitions- lean ECM detected bank1 02 at its leanlimit probable cause -Misfire Bank one -Vacuum Leak Affecting Bank...
  4. 4.6L Tech
    Car: 1996 GT Auto Mods: underdrive pulleys, CAI (recently installed, MAF positioned at 12 o'clock), PI intake manifold Scenarios: 1) A/C on and coming to a stop from moderate to high speed, car dies or RPMs drop dramatically. 2) A/C off at idle and then switched on, car dies or RPMs drop...
  5. 5.0L Tech
    Hello all. I have a mostly stock 88 gt (except for 2.5 inch pipes, cold air intake, maf conversion), and I'm have missfire problems. The car has ALL new engine control sensors that I've steadily replaced during the 2 years I've owned it. There is a vacuum leak in the throttle body body where the...
  6. Introductions
    i recently did upper and lower intake gaskets on my 1988 ford mustang 5.0 and ive come across some problems. first it idles at 600 or 700 and before i did all of this it idled at 800 to 1100. second when i rev it up it feels boggy and almost sounds like its backfiring. third sometimes when i...
  7. Introductions
    My car is bone stock minus the flowmaster mufflers. I have changed the IAC twice since January. It recently received a new TPS. I have taken the TB off and cleaned it out. I heard that the throttle body cleaner is bad for it, so I got some silicone sealant and re-coated the inside. There is no...
  8. 5.0L Tech
    i have a really high idle on my 1995 mustang 5.0. when i start it up, it idles up to 1500 like normal and normally goes down to 900, after like about 5 seconds little by little the idle goes up to 1500 rpms again. and it stays there, also when i am driving if i let go of the gas, the car is...
  9. V6 Tech
    I picked up a 1997 Mustang in really nice shape for the money (I'm a mostly broke college student so I took what I could get) last week. It does have some issues with the driver's side power accessories, though, and I'd appreciate some advice. First off, the power locks. Passenger side...
  10. Classic Tech
    So, i just put a 4bbl ford aluminum intake on my 289 block. on the intake plane there is a oval hole where the egr used to feed back into the intake (on whatever emission controlled vehicle this came from. I know i have a vacuum leak there and it is causing fluxuations in rpm. is there a way to...
  11. 4.6L Tech
    So, here's my situation. After 2 years I finally had the transmission rebuilt in my 1998 Mustang GT. Before I took it to the shop I tried to start it with no avail. Come to find out it was the fuel pump. When replacing the fuel pump I noticed the grommet that is on the fuel tank which the...
  12. 5.0L Tech
    ok so i did an upper and lower intake manifold swap and took out the distributor and such. When i put the car back together i put the distributor in exactly how i marked it when it came out. one wire got pulled during the swap, not sure what it was but i put it back in the crimp and cranked the...
  13. 5.0L Tech
    Need help on what I need and best way to do it. Got o-ring gaskets, intake upper and lower manifold gaskets, tb gaskets and going to get a thermostat gasket tomorrow, anything else im missing? Thanks
  14. 5.0L Tech
    Hey everyone, happy new year, im having this problem yet again, my car will be sitting at 1k rpm's and ill watch the tachometer and it will bounce to about 1800 rpm's with barely any change to the sound of the idle, it does this very often. seems more often when the heat is on, i've replaced...
  15. V6 Tech
    2001 3.8 5 speed Mustang (some after market parts, for example-PTK Pro Turbocharger Kit, SCT 4-bank eliminator chip...etc. )Here is my problem. I have lost ALL (giddyup) acceleration the car what once flew down the road now only sputters at most. All was find until a couple of days ago its lost...
  16. 5.0L Tech
    I need some help, the guy I bought my car from a while ago deleted the smog pump and left all the smog lines hanging around, the only ones that are coming from the black vacuum cluster are the one that goes to the egr and the one to the intake. How to I go about getting rid of this mess behind...
  17. 5.0L Tech
    I have been dealing with a vacuum leak for ages and finally just noticed something, im not sure if this needs to be hooked up or not but I have a feeling it does but I dont know what it is or where the line would go! It is behind the intake to the right of the egr. Thanks in advance
  18. V6 Tech
    got a code 51 when i used a diagnostics test the KOEO test showed i had a code 51 , had my instructor at school look it up and apparently its an internal fuse that blew, any ways wouldn't mind some help with it if anyone knows what's going on ha ha. other than that extreme play in my throttle...
  19. 5.0L Tech
    Ive replaced my air charge temperature sensor, cleaned my throttle body and IAC as well as MAF sensor. the high idle occurs about 5 minutes into driving and is powerfull enough for my car to act as if its in cruise control, when i put my hand over the throttle body while it was running it killed...
  20. 2.3L Tech
    Howdy everyone, I've been a long time lurker on this site, finding great information on my 1991 Mustang (2.3 L, NA, 4 speed automatic). This is the first time I've ever needed to ask something so specific though... Recently (with the help of this forum, of course), I diagnosed a problem with...
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