99 Vortech V2 Gt Problems.

Discussion in '1996 - 2004 SN95 Mustang -General/Talk-' started by 99BlownGT, Apr 3, 2014.


  1. 99BlownGT

    99BlownGT New Member

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    Well where do I start. I just had my motor rebuilt due to a busted piston, bored 0.30, forged rods and pistons. After install it had a really rough idle so I threw my SCT programer on it and retuned it back to the tune it was running before rebuild. It ran fine a little hesitant but I figured it was because of the fresh build the motor being real tight.
    Well day by day its getting worse, I only have 100 miles on the motor, It seems like its starving for air or fuel I dont know which. At a Idle it goes between 740 rpms and 810, I have a digital tac.
    When you give it about 30% throttle it hesitates then I feel it get its power, but cruising at a solid speed, if i let off the gas it give it gas again to maintain its speed it seems like its choking. I have checked for vacum leaks i cant find any, I have a exhaust leak on my headers just need to tighten it, dont think that would be cause it to run like it is tho.
    I have duel cobra fuel pumps, 42lb injectors, its intercooled, and tons of other mods. Any advice would be great guys.
     
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  2. 99BlownGT

    99BlownGT New Member

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    Also I want to add when cruising or barley letting off the gas but still giving it some sounds like my blow off valve is releasing even tho I'm giving it gas...
     
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  3. madspeed

    madspeed Colonel Mustard Mod Dude Founding Member

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    Turboed or supercharged? Turbos can be finicking when ran with headers that are leaking
     
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  4. madspeed

    madspeed Colonel Mustard Mod Dude Founding Member

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    Sorry, just saw the title, so cancel that
     
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  5. Nightfire

    Nightfire Mustang Master

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    Get that thing properly tuned! Then see if you still have problems.
     
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  6. 99BlownGT

    99BlownGT New Member

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    Yea thats easy to say, but I'm not gonna spend 500-600$ and "hopfuly" fix it.
     
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  7. madspeed

    madspeed Colonel Mustard Mod Dude Founding Member

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    List everything that was changed and the mods that are done. Was it running good prior to the engine rebuild?
     
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  8. 99BlownGT

    99BlownGT New Member

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    Only thing that was changed was a boar on the motor and forged rods and pistons. It was running fine prior to busting a piston.
     
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  9. 99BlownGT

    99BlownGT New Member

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    Engine and Suspension
    - vortech sq s/c at 10psi. with procharger a-a intercooler tuned and built at psi motorsports
    - twin 2003-2004 cobra fuel pump and 45# fuel injectors
    - QA1 tubular front end (k-member, control arms etc etc)
    - BBK Longtube ceramic coated headers
    - BBK offroad H pipe with Mac mufflers and SLP rolled 3.5" tips
    - accel performance coils
    - 75mm Throttle body and plenum
    - 2003-2004 cobra 13" brakes with stainless steel braided brake lines (brakes hard enough to make you poo your pants)
    - Maximum motorsports lower control arms
    - Maximum motorsports full length subframe connectors
    - poly eurethane engine mounts, steering rack bushings and sway bar bushings
    - Motive 3.73 gears
    - Blue oval industries strut tower brace
    - Steeda battery to trunk relocation kit (installed at psi motorsports have reciepts)
    - MGW short throw shifter
    - Autometer digital tachometer, boost gauge, water temp and oil pressure gauge (all mechanical)
     
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  10. Nightfire

    Nightfire Mustang Master

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    The car needs to be properly tuned regardless of your issues (which could very well be due to the tune). $5-600 for a tune is crazy high. Were you quoted that price?
     
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  11. 99BlownGT

    99BlownGT New Member

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    Stang-Hi in Baton Rouge la
     
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  12. Nightfire

    Nightfire Mustang Master

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    Damn dude, they're gouging the crap out of you....
     
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  13. superstang01

    superstang01 Member

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    Get it tuned. Not much else you can do really...

    My tune was 400$....an I was at the dyno 2 times. You are getting gouged hard
     
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  14. 84Ttop

    84Ttop They make new pistons every day, so why worry? SN Certified Technician Mod Dude

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    Call Frank back and have the car re tuned. I think it is just that simple!
     
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