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  1. 5.0/5.8 Engine Tech
    Morning, I have a 1992 Mustang GT 5.0 and decided to changed out my valve cover gaskets. During this process I installed new hoses on the intake, due to cracks. Now that I've put everything back together, the car will crank, but will not stay running. It'll fire up fine, but will not idle. I've...
  2. 5.0/5.8 Engine Tech
    Yo need some insight on a issue my fox has had for a bit. When I cold start I have a rough/surging idle until it fully warm ups. To find the issue I would unplug sensors one by one and if there was a change without it plugged in I assumed it was working when plugged in. When I unplug the maf no...
  3. 5.0/5.8 Engine Tech
    91 foxbody . 302 with 60lbs injectors , 90mm maf , vortech v2 . B303 cam advanced timing to about 14 degrees per tuner and fuel pressure at 32 psi with vacuum on. Has a sct chip . Problem I'm having when I start er up fires right up rpms go to about 1200 then come down to about 1000 chills for...
  4. Drag Racing
    Hi all First off let me state I am new here and need help with a problem I just cant figure out. So I have a 94 cobra and I am having issues with it idling. When I start it up it takes it time to find its idle by going up and down a lot. Most times it will go up and down a few times and then...
  5. 5.0/5.8 Engine Tech
    OK! First time actually doing this because I cannot take the mental stress this damn car is giving me! I have a 86 Speed Density with the following mods: gt40p heads ford racing shorties 70mm tb and egr spacer gt40upper and lower gt40 3/8 spacer bbk cai electric fan alum radiator egr delete ac...
  6. SVT & DOHC
    I have a 98 cobra just rebuilt the engine. But i need help i had a custom tune made already but when i drive, it some times idles but sometimes wont. I already replaced the IAC, and checked for vacuum leaks. It also hesitates when i roll onto the gas, rpms drops and the car dies. ANY ideas, I...
  7. SVT & DOHC
    hey there fellow mustung guys.. i recently purchased a 98 mustang cobra as my first sports cars ive been into crotchrockets... Anyways..... when i pull up to a stop and take it out of first it wants to idle at 1,200-1,400rpm for about 5 seconds before dropping to 900rpm. at one point it was...
  8. GT & SOHC
    Ok, so I have been having this problem with the idle being very erratic, it'll surge, and I have found out that the A/C was the culprit. Every time I would turn on the A/C, the car would surge very badly at idle, sometime's going down to 0 rpms, then returning to 1000 and back to 200 rpms, then...
  9. 5.0/5.8 Engine Tech
    i cant the car to idle below about 900 without it dieing.. and after i get it to that point i kill it and try to start it again and its pretty difficult.. im thinking vacuum leak but i quit for the night anybody else got any ideas?
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