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Old 08-28-2004, 08:28 PM
Arthur Dalton Arthur Dalton is offline
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Join Date: Aug 1999
Location: Florida / N.H.
Posts: 8,804
>>No codes (single blink) and the only abnormality is a slightly fluctuation in idle speed (between 500 - 700 rpm).

Need someone to give me a clue of the probable causes and a sequence of tests I could perform to find them and get them fixed.
No codes stored on led/sw is just Check Engine module.
Are you getting a single flash [ no codes stored ] on pin #8 ???
You want to see what is stored on the HFM-SFI module. [ pin 8 with a homemade led tool]
That will give you fuel/ignition malfunction any
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