'94 IDI factory turbo Questions! - Ford Powerstroke Diesel Forum
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Old 11-26-2007, 08:12 PM
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'94 IDI factory turbo Questions!

Just bought a '94 7.3 factory turbo with an automatic trans., it runs great but has two little issues I don't understand and need help with. First the tach sits on 0 until I start accelerating and then it works fine, and seems to be accurate, it just doesnt respond while just at idle. Second, every once in a while while I am driving, whether I have overdrive locked out or not, when I let off the accelerator the overdrive light starts flashing until I accelerate again. Do I have a speed sensor going bad? Trans. still operates normal even when this happens, maybe nothing to worry about, just wondering. Any advice would be appreciated! Thanks!
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Old 11-29-2007, 02:40 PM
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I don't know much about the tach problem, probably a sensor. As far as the OD off light blinking, my 94 IDI non-turbo would randomly flash the OD off light and this would put the tranny in limp mode and firm up the shifts so much it shook the truck when shifting. I also noticed my brake and ABS lights on. After a little research, I found that the ABS sensor mounted on the rear axle was the main cause for this. Replaced the sensor ($12 at NAPA) and all was good again.
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Old 11-29-2007, 02:58 PM
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When the O/D light flashes it means there is a trouble code with the trans. It will need to be read with a code scanner to find out what the code is/means.
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Old 11-29-2007, 05:26 PM
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Thanks guys, I really appreciate the help, now I have somewhere to start!
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Old 12-15-2007, 01:17 PM
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Quote:
Originally Posted by 94OilBurner View Post
I don't know much about the tach problem, probably a sensor. As far as the OD off light blinking, my 94 IDI non-turbo would randomly flash the OD off light and this would put the tranny in limp mode and firm up the shifts so much it shook the truck when shifting. I also noticed my brake and ABS lights on. After a little research, I found that the ABS sensor mounted on the rear axle was the main cause for this. Replaced the sensor ($12 at NAPA) and all was good again.
I got a new ABS speed sensor and my blinking overdrive off light problem is gone!!!!!!! Thanks for the help!!!!
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Old 12-16-2007, 06:22 AM
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Originally Posted by powerstrokes only View Post
I got a new ABS speed sensor and my blinking overdrive off light problem is gone!!!!!!! Thanks for the help!!!!
Good to hear!

That will be $100
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