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87 Ranger computer change question

wingzam

New Member
Joined
October 12, 2006
Messages
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City, State
Lake City FLA
Year, Model & Trim Level
Ranger 1987 XLT
Well,i've been all thru this truck trying to fix a hesitation problem.This problem appears to be related to another symptom of hunting for correct idle speed on cold start.I can't find a vac leak.IAC is new (been thru all the other systems as well).Am down to the computer but am getting no error codes.Was using one of those diagnostic readers with a digital display which has a test function that triggers the computer to activate the relays (and sensors,if I recall correctly).this function worked the first two times I used the thing but has stopped triggering this test.Have heard that you can't just replace the computer - that it has to be "flashed" to work with the vehicle.Can someone tell me anything about this?Thanks
 






Please disregard.Question answered.
 






..And for future readers, what was the fix???...:scratch:
 






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