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Discussion Starter · #1 ·
Hi, i have a 93 f250 with a e40d, i recently changed the rpm sensor and tps. When i just start my truck and get going and let off the throtle, the OD button flashes. When i press on the throtle again it goes away and does not come back, only does this when cold and have not given it much time to warm up, like a minute. Could this be because of a bad speed sensor??
 

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Grumpy Old Member
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849 Posts
You need to have the ecm scanned for any codes, it may have one stored without iluminating the check engine light. Have you serviced the tranny filter?
 

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Discussion Starter · #3 ·
Yup i did serviced the filter when i changed my fluid a couple months ago, but it only started doing it once i put on a new TPS and goes away when i press down on the throtle.
 

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Grumpy Old Member
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OK it sounds like a sensor issue. You need to have it scanned and find what codes are in it. This will get you pointed in the right direction.
 
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