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Old 05-19-2015, 09:44 PM   #33 (permalink)
Cyborg ECU
California98Civic's Avatar
Join Date: Mar 2011
Location: Coastal Southern California
Posts: 6,299

Black and Green - '98 Honda Civic DX Coupe
Team Honda
90 day: 66.42 mpg (US)

Black and Red - '00 Nashbar Custom built eBike
90 day: 3671.43 mpg (US)
Thanks: 2,373
Thanked 2,171 Times in 1,468 Posts

After 20 or 25 miles of normal operation, the problem returned as I began the return commute. I stopped repeatedly, checking one connection at a time until the problem went away again. It turned out to be the connector into the MAP sensor. Back in March or April, when I repaired the fuel pressure regulator the second time, I relocated my extra brake booster and it seems the vacuum line began to conact and stress the wires into the connector for the MAP. Since it was behind and under the air cleaner box, against the firewall, I did not notice. As soon as I repositioned the vacuum line and reattached the MAP sensor connector, the problem went away.

Perhaps the problem is solved, but only driving will "prove" it.


See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.

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