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Old 02-04-2008, 10:05 PM
ford trans tech ford trans tech is offline
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89-94 f series with E4OD are equipped with EEC-IV , OBDI to others , memory codes do not have to be cleared for normal operation once the failed or failing component is repaired or replaced EEC-IV only monitors for a failure not performance like OBDII , and most of the PCM,S will clear the memory codes after about 40 warmup cycles if teh concern does not repeat , and when a KOEO test is performed it clears the memory codes automatically , but if the power to the processors keep alive memory is faulty it will erase the codes at every key off cycle but should have a code 15 for it ,if you have an O/D light flashing then it has stored at least one memory code and it can be retrieved if done properly EEC-IV is picky when being tested if the tester isnt operated correctly it wiil erase the codes before they can be retrieved , being you have a 92 model does the speedo ever fluctuate , and see if the cruise control operates and if it shuts off when the light begins to blink if so there could be a problem with the PSOM /programmable speedometer/odometer module , if the cruise shuts off but the speedometer reads normally there is a good chance the PSOM is bad , it relays the speed sensor signal to the processor
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Old 05-28-2014, 10:26 AM
beg74 beg74 is offline
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I know you wrote the question about the e4od tranny a long time ago, but I'm having the exact issue. Did you ever figure out the blinking o/d light?
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Old 05-28-2014, 10:26 AM

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1995, 2006, 634, clear, code, codes, continuous, engine, f250, ford, obd1, read, shutdown, sterling, switch, symptoms, tranny, truck

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