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SVT Shelby GT500
codes 2104 and 2112...bad ECM or ??
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<blockquote data-quote="hrtatak" data-source="post: 10648851" data-attributes="member: 2390"><p>UnleashedBeast.....I want to THANK YOU. :beer: Your first post got me to thinking about something, so I pulled the throttle body.</p><p></p><p>When you posted the pic and the following......The arrow shows you the spring loaded tip inside of the threaded throttle stop shaft......it got me to thinking "Hey, there was no spring loaded tip on the end of the throttle stop screw." I took it back apart last nite and indeed, it isn't there.</p><p></p><p>EVERYTHING THAT FOLLOWS IS JUST A GUESS ON MY PART, BUT KNOWING A VERY TINY BIT ABOUT ELECTRONICS, MAKES ME THINK I AM ON THE RIGHT PATH, SO PROCEED WITH CAUTION........:-D:-D</p><p></p><p>The factory throttle body I bought has the tip, and the spring under it is much stiffer than the throttle blade return spring. My guess is when you turn the key on, the car moves the throttle blades some and the ECM sees the rate of the voltage swing change/slow down when it parks on this stiffer spring as the throttle closes and it knows all is well in drive-by-wire land.</p><p></p><p>My TPS voltage was .796 when I first checked it. It was low because that tip is missing and let the blades close too much. I adjusted it to the correct range by threading the screw in more, but with the spring loaded tip missing the car isn't seeing the voltage swing rate change and isn't happy and instantly goes into the dreaded failsafe mode.</p><p></p><p>NOW BACK TO MORE OF THE STORY....</p><p></p><p>My car has a dent in the door from the previous owner hitting his mailbox when the throttle stuck(at least that is what he told the bank when they repo'd the car). I bet the tip and spring came off and got wedged in the gears causing the throttle to stick. I can tell he had been trying to figure out what happened and I guess he didn't notice the tip and spring falling out when he took the throttle body apart. They weren't in it when I took it apart. I am sitting at the desk that I took it apart at and have searched all over and no extra pieces are laying around.</p><p></p><p>I hope that this is the problem and finally has me headed down the right path to fix the car. I will let you all know.</p></blockquote><p></p>
[QUOTE="hrtatak, post: 10648851, member: 2390"] UnleashedBeast.....I want to THANK YOU. :beer: Your first post got me to thinking about something, so I pulled the throttle body. When you posted the pic and the following......The arrow shows you the spring loaded tip inside of the threaded throttle stop shaft......it got me to thinking "Hey, there was no spring loaded tip on the end of the throttle stop screw." I took it back apart last nite and indeed, it isn't there. EVERYTHING THAT FOLLOWS IS JUST A GUESS ON MY PART, BUT KNOWING A VERY TINY BIT ABOUT ELECTRONICS, MAKES ME THINK I AM ON THE RIGHT PATH, SO PROCEED WITH CAUTION........:-D:-D The factory throttle body I bought has the tip, and the spring under it is much stiffer than the throttle blade return spring. My guess is when you turn the key on, the car moves the throttle blades some and the ECM sees the rate of the voltage swing change/slow down when it parks on this stiffer spring as the throttle closes and it knows all is well in drive-by-wire land. My TPS voltage was .796 when I first checked it. It was low because that tip is missing and let the blades close too much. I adjusted it to the correct range by threading the screw in more, but with the spring loaded tip missing the car isn't seeing the voltage swing rate change and isn't happy and instantly goes into the dreaded failsafe mode. NOW BACK TO MORE OF THE STORY.... My car has a dent in the door from the previous owner hitting his mailbox when the throttle stuck(at least that is what he told the bank when they repo'd the car). I bet the tip and spring came off and got wedged in the gears causing the throttle to stick. I can tell he had been trying to figure out what happened and I guess he didn't notice the tip and spring falling out when he took the throttle body apart. They weren't in it when I took it apart. I am sitting at the desk that I took it apart at and have searched all over and no extra pieces are laying around. I hope that this is the problem and finally has me headed down the right path to fix the car. I will let you all know. [/QUOTE]
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SVT Shelby GT500
codes 2104 and 2112...bad ECM or ??
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