tommy36301 Posted November 30, 2009 Report Share Posted November 30, 2009 Love my '08 SGT #574 (5 speed). Every once in a while, starting the car becomes an issue. Seems like the engine is confused. Normally it fires right up, but during the state of confusion, it cranks over and will not fire. I can tell it is going to happen as soon as I hit the key. Have to turn the key off and try again. Usually, I have to really stay on the key longer into the start-up crank mode, even as the motor stumbles and rumbles back to life. Runs just fine after the event. After that, it will be fine for several weeks and then do it again. I burn nothing but 93 octane Crystal Clear BP - Amoco Ultimate. This ocurred before and after my engine mods. I think I saw another thread about this issue last year on this site or possibly Mustangforum. Anyone have information on this? Link to comment Share on other sites More sharing options...
427 Cammer Posted November 30, 2009 Report Share Posted November 30, 2009 Mine did that same thing about 2 weeks ago, with people standing around, it was a little embarassing. I had to do a burnout to make me feel better. Link to comment Share on other sites More sharing options...
kahmann Posted November 30, 2009 Report Share Posted November 30, 2009 Is it stumbling and bumbling while trying to fire or is it just cranking with no action? Ken Link to comment Share on other sites More sharing options...
COBRA SCOTTY Posted November 30, 2009 Report Share Posted November 30, 2009 IF YOU HAVE ADDED ANY MODS AND ONE OF THEM WAS A COLD AIR INTAKE YOU MIGHT NEED TO CHECK FOR A VACUM LEAK OR A LOOSE HOSE CLAMP ON YOU INTAKE TUBE COMING FROM THE OPEN ELEMENT AIR FILTER TO THE THROTTLE BODY. JUST A GUESS WITH- OUT KNOWING ALL OF THE SYMTOMS OR FACTS. B.O.L SCOTTY Link to comment Share on other sites More sharing options...
gth0007 Posted November 30, 2009 Report Share Posted November 30, 2009 IF YOU HAVE ADDED ANY MODS AND ONE OF THEM WAS A COLD AIR INTAKE YOU MIGHT NEED TO CHECK FOR A VACUM LEAK OR A LOOSE HOSE CLAMP ON YOU INTAKE TUBE COMING FROM THE OPEN ELEMENT AIR FILTER TO THE THROTTLE BODY. JUST A GUESS WITH- OUT KNOWING ALL OF THE SYMTOMS OR FACTS. B.O.L SCOTTY Definitely check the air inlet clamps, particularly at the underside of the throttle body. Last week I was cruising along on the interstate when my SGT starting surging and running rough. I exited and could hardly make it through the stop sign. Pulled into a fruit stand, lifted the hood, and my Steeda carbon fiber air inlet tube had totally slipped off and was about to fall into the fan. I knew the thing was loose but had forgotten to tighten so my stupidity, but this had happened before on the tube going into the filter, not much of a problem, but this time it came loose at the throttle body as well, and the old SGT said, enough already!! Link to comment Share on other sites More sharing options...
motorjock205 Posted November 30, 2009 Report Share Posted November 30, 2009 Love my '08 SGT #574 (5 speed). Every once in a while, starting the car becomes an issue. Seems like the engine is confused. Normally it fires right up, but during the state of confusion, it cranks over and will not fire. I can tell it is going to happen as soon as I hit the key. Have to turn the key off and try again. Usually, I have to really stay on the key longer into the start-up crank mode, even as the motor stumbles and rumbles back to life. Runs just fine after the event. After that, it will be fine for several weeks and then do it again. I burn nothing but 93 octane Crystal Clear BP - Amoco Ultimate. This ocurred before and after my engine mods. I think I saw another thread about this issue last year on this site or possibly Mustangforum. Anyone have information on this? My SGT (08SGT0235) does this every once in a while...no pattern to it, but like you, I can seem to tell when it is going to happen just as soon as I turn the key...once it fires, it sits there and stumbles for several seconds before finally "catching up" and then runs fine... Link to comment Share on other sites More sharing options...
ShowCar Posted November 30, 2009 Report Share Posted November 30, 2009 This is the "cold start function" on the ford racing and other tuners out there. When the temp. goes below sixty degrees and the car sits for twelve hours or longer this occurs. Next time it happens press the throttle half way and see if this helps it keep running. Both my ford tunes did this, from shelby and from FRPP with the supercharger. I had the tune fixed by Ford then I had my personel tuner fix it permanently. The problem is mainly with the upper half of the US in colder climates. Ask your dealer about it and bring it in. Make sure they leave it outside in the cold to produce the problem otherwise they wont duplicate it in a warm shop. It took my dealer two phone calls to put it outside to reproduce the condition back in 2007 when I bought the car. It isnt a vacuum leak because a leak will happen hot or cold. Its not the fuel pump or pump module either. Hopefully more TS members will chime in on this condition. Good luck. Link to comment Share on other sites More sharing options...
tommy36301 Posted December 1, 2009 Author Report Share Posted December 1, 2009 This is the "cold start function" on the ford racing and other tuners out there. When the temp. goes below sixty degrees and the car sits for twelve hours or longer this occurs. Next time it happens press the throttle half way and see if this helps it keep running. Both my ford tunes did this, from shelby and from FRPP with the supercharger. I had the tune fixed by Ford then I had my personel tuner fix it permanently. The problem is mainly with the upper half of the US in colder climates. Ask your dealer about it and bring it in. Make sure they leave it outside in the cold to produce the problem otherwise they wont duplicate it in a warm shop. It took my dealer two phone calls to put it outside to reproduce the condition back in 2007 when I bought the car. It isnt a vacuum leak because a leak will happen hot or cold. Its not the fuel pump or pump module either. Hopefully more TS members will chime in on this condition. Good luck. Everytime this ocurrs, I have already had the car out cruizin and it is at normal operating temperature. It ocurrs when I stop somewhere and return to start the motor. Very spuratic, happens maybe once a month or so. The cold air intake is the original Shelby Steeda CAI installed in Vegas. As stated this happened when "stock" and also after my mods.. COMP Thumper CAMS Steeda Delete plates Steeda under-pullies KOOKS LT Headers KOOKS CATS Corsa Axleback mufflers Ford Racing 4:10's BRENSPEED 93 octane tune American Racing GT5 19" single block forged aluminum wheels Thanks for everyone's thoughts on this. Link to comment Share on other sites More sharing options...
ShowCar Posted December 1, 2009 Report Share Posted December 1, 2009 Good Luck. Link to comment Share on other sites More sharing options...
STLShelby Posted December 1, 2009 Report Share Posted December 1, 2009 Hm.. mines never done that. It sits in the garage without being started for as long as a month at times. Link to comment Share on other sites More sharing options...
Frank S Posted December 1, 2009 Report Share Posted December 1, 2009 Hm.. mines never done that. It sits in the garage without being started for as long as a month at times. You put an ad in the paper or on Craig's list, you can probably find someone willing to drive it more often for you at a reasonable rate ... Link to comment Share on other sites More sharing options...
STLShelby Posted December 2, 2009 Report Share Posted December 2, 2009 You put an ad in the paper or on Craig's list, you can probably find someone willing to drive it more often for you at a reasonable rate ... Had it 2 years in Oct. and it has 2500 miles on it. I think i need to get out more..... Link to comment Share on other sites More sharing options...
2007_Shelby_GT Posted December 2, 2009 Report Share Posted December 2, 2009 Has it been randomly stumbling and stuttering since new or did it start after putting on some miles? How many miles do you have now? Just a guess, but if you haven't yet, try changing the fuel filter. Sam Link to comment Share on other sites More sharing options...
COBRA SCOTTY Posted December 2, 2009 Report Share Posted December 2, 2009 Has it been randomly stumbling and stuttering since new or did it start after putting on some miles? How many miles do you have now? Just a guess, but if you haven't yet, try changing the fuel filter. Sam DEVIL BUNNY ? IT LOOKS MORE LIKE AN ANGRY DOG W/BUNNY EARS ON STERIODS. SCOTTY Link to comment Share on other sites More sharing options...
2007_Shelby_GT Posted December 3, 2009 Report Share Posted December 3, 2009 DEVIL BUNNY ? IT LOOKS MORE LIKE AN ANGRY DOG W/BUNNY EARS ON STERIODS. SCOTTY Parson (Jack) Russell with a bad temper + less than flattering bunny ears + laughter and teasing from owner = Devil Bunny! (Kinda what that rabbit from Monty Python would look like if it were coming at you!) Makes a great logo for my impromptu race team! Sam Link to comment Share on other sites More sharing options...
SecretSquirrel Posted December 3, 2009 Report Share Posted December 3, 2009 Love my '08 SGT #574 (5 speed). Every once in a while, starting the car becomes an issue. Seems like the engine is confused. Normally it fires right up, but during the state of confusion, it cranks over and will not fire. I can tell it is going to happen as soon as I hit the key. Have to turn the key off and try again. Usually, I have to really stay on the key longer into the start-up crank mode, even as the motor stumbles and rumbles back to life. Runs just fine after the event. After that, it will be fine for several weeks and then do it again. My car did this, turned out to be a bad fuel pump. Link to comment Share on other sites More sharing options...
ChrisSD Posted December 3, 2009 Report Share Posted December 3, 2009 I think it's the clutch switch. Make sure the clutch is literally floored when you crank the engine. That switch can be flaky if the clutch isn't all the way in completing the contact or you are 1mm off the floor and "lightswitching" it. Link to comment Share on other sites More sharing options...
COBRA SCOTTY Posted December 4, 2009 Report Share Posted December 4, 2009 I think it's the clutch switch. Make sure the clutch is literally floored when you crank the engine. That switch can be flaky if the clutch isn't all the way in completing the contact or you are 1mm off the floor and "lightswitching" it. I HAVE EXPERIENCED THE NO START CONDITION WHEN NOT DEPRESSING THE CLUTCH ALL THE WAY TO THE FLOOR BOARDS ;BUT THE ENGINE DOES NOT CRANK AT ALL.THAT BEING SAID , THE SYMTOMS IN THIS CASE ARE NOT THE SAME. IMO SCOTTY Link to comment Share on other sites More sharing options...
motorjock205 Posted December 4, 2009 Report Share Posted December 4, 2009 I HAVE EXPERIENCED THE NO START CONDITION WHEN NOT DEPRESSING THE CLUTCH ALL THE WAY TO THE FLOOR BOARDS ;BUT THE ENGINE DOES NOT CRANK AT ALL.THAT BEING SAID , THE SYMTOMS IN THIS CASE ARE NOT THE SAME. IMO SCOTTY Yeah, that's not it, mine won't even click without the clutch being all the way on the floor...maybe we'll figure it out some day... Link to comment Share on other sites More sharing options...
07SGT4578 Posted December 4, 2009 Report Share Posted December 4, 2009 Where I have never had this happen in my Shelby, my 03 mach and both Lightnings that I had did this. Never did figure out why it happened and could never get an answer from Ford either. When I first read this thread, I realized how long its been since I have had this happen. Watch, as soon as I get my car back, it will start doing it now. I knew I shouldnt have clicked on this topic. Chris Link to comment Share on other sites More sharing options...
gbstang Posted December 12, 2009 Report Share Posted December 12, 2009 Definately not the clutch switch, I have an automatic and it does it sometimes,,,like you mine is very sporatic too... As of this date, and I am going on now 10 months as the first owner,,,its happened 4 times... I think the next time it does it, I will go get a beer and Reboot! GNB Link to comment Share on other sites More sharing options...
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