Speedcal issues

96dreamer

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I was running an extended range speed call in my 96 cobra which has a 2003 cobra t56 in it. Driving down the interstate the speedo and trip suddenly stopped working. It had been working fine for several thousand miles before this. I double and triple checked the wiring to the speedcal. Ran a direct 12v to the battery to eliminate any power wiring issues and still never was able to get a speed to show up. Disconnecting the speedcal and running the stock set up produced speeds about 4x more than the correct speeds which is what a properly working vss would produce in this setup.

Has anyone experienced this issue before? Do these things often just randomly quit working, I am assuming there is no fix for this and I will have to buy a new one.
 

Brandnelson

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My speedcal randomly quit on me twice now. Disconnecting the battery and reconnecting brought it back both times.
 

96dreamer

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Yeah i've tried that twice now, maybe the third time will be the charm. I have it completely out of the car currently
 

96dreamer

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Well I emailed Dallas mustang explained my issues. They agreed the unit was probably shot and also said these usually only last 3-6 years which seems like some bullshit in my opinion. Looks like I will be ordering a new one today. Hopefully im not throwing $120 out the door.
 

MysticChaos

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Well I emailed Dallas mustang explained my issues. They agreed the unit was probably shot and also said these usually only last 3-6 years which seems like some bullshit in my opinion. Looks like I will be ordering a new one today. Hopefully im not throwing $120 out the door.
I Went through the same issues a few months ago and got the same response from DM. I was skeptical too, but they were right. I swapped in the replacement and everything worked again. I do agree it's bs that they aren't built to last though.
 

96dreamer

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Cobra is getting some love today, dropped over $300 on ac components and the speed cal. I've been neglecting her since i got my Cherokee a few months ago. Hopefully a new ac compressor/dryer/orifice tube and the speedcal will make it more enjoyable to drive here soon. Should feel fast again after driving a lifted Cherokee for a few weeks.
 

Balt21

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Interesting read as I have been thinking about picking one up. I wish these cars worked with a handheld tuner for gear ratio/tire changes. Funny that they only last 3-6 years and they are intended for cars 19+ years old. I get it though, electronics are electronics and they break after continued use.
 

96dreamer

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I got the new speedcal installed this weekend. It seemed to work on jack stands haven't had it on the road yet though. I took the new one apart and put some foam tape between the circuit board and the box to hopefully isolate it from vibration a little bit. I also put foam insulation tape between the box and trans tunnel for the same purpose. hopefully this one lasts a bit longer.
 

Bishop03

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Good timing on your thread, same exact issue happen to me at the end of last year. Same set up. Before ordering another I will be looking for a cold solder joint, electronics like this and jarring lead to such things.
 

96dreamer

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Well almost exactly two years later another box is dead. This is starting to get pretty old. Just finished a 3 hours round trip drive using my phone as a speedo the whole time.
 

96dreamer

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Wish that was still an option for me. I'm running a t56 so I have no choice but to run the speedcal.
 

96dreamer

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In an email directly from a Dallas mustang rep he said they last between 3-6 on average. My first one lasted 5 years and this one I bought 2 years ago almost to the day. They carry a 1 year warranty but I am trying to get them to at least give me a price break. This is a garage kept car the hardly gets driven. I bet I had less than 3k on this box and maybe 5k on the first one.
 

96dreamer

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96dreamer

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Well it looks like Dallas Mustang is coming through. I just had a rep email me saying they would replace my current unit free of charge and include a return label to send the bad one back. If this happens again in the future I still may be tempted to switch to the Dakota Digital product because swapping this out every few years is going to get pretty old. But in the mean time I have to commend their customer service on this one.

Edit: Also for anyone that comes across this Dakota Digital tech support got back to me confirming that the SGI-5E will work in this application with no issues. It would just require some fine tuning once wired up to dial it in exactly.
 
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PSUCOBRA96

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Anyone have any issues with electrical draw from the car when parked? Mine cant seem to keep a charge for at most a week. The only major change I did to the electrical system since this issue started was the Speed cal. Maybe the FRPP one is better.
 

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