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Old 07-31-2018, 08:30 PM   #21 (permalink)
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Blackfly - '98 Geo Metro
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Last 3: 70.09 mpg (US)

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90 day: 55.97 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 70.75 mpg (US)

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A-b ... A

5 times a charm! 5 cold starts with no probs, using the Firefly's coil.

I'm going to swap the Metro's coil back on tomorrow and see what happens for the next 5.


But I think that's got to be it (touching wood).

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Project MPGiata! Mods for getting 50+ MPG from a 1990 Miata
Honda mods: Ecomodding my $800 Honda Fit 5-speed beater
Mitsu mods: 70 MPG in my ecomodded, dirt cheap, 3-cylinder Mirage.
Ecodriving test: Manual vs. automatic transmission MPG showdown



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Old 08-01-2018, 12:00 PM   #22 (permalink)
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Black and Green - '98 Honda Civic DX Coupe
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Cool. "Known good & free" parts make great diagnostic tools, haha! Looking forward to the return of bucking and stalling when the old coil returns to duty. Then we know!
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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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Old 08-01-2018, 02:25 PM   #23 (permalink)
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Firefly EV - '98 Pontiac Firefly EV
90 day: 107.65 mpg (US)

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It just wanted some love and attention. She'll be fine if you treat her right.
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Old 08-01-2018, 04:24 PM   #24 (permalink)
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Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 55.97 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 70.75 mpg (US)

Appliance car - '14 Mitsubishi Mirage ES (base)
90 day: 67.41 mpg (US)
Thanks: 3,997
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I think Stubby might be right: I put the old coil back in and it fired right up. Just wanted some attention?

Intermittent problems are fun!

This is killing my tank average, too ... threatening my 70 MPG goal! SG said ~72 MPG when this nonsense started. Now it's 70.5

I should fill up now to lock it in. Put some of this silliness on the next tank.
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Project MPGiata! Mods for getting 50+ MPG from a 1990 Miata
Honda mods: Ecomodding my $800 Honda Fit 5-speed beater
Mitsu mods: 70 MPG in my ecomodded, dirt cheap, 3-cylinder Mirage.
Ecodriving test: Manual vs. automatic transmission MPG showdown



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Old 08-01-2018, 11:04 PM   #25 (permalink)
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Factory Ford troubleshooting has you install a known good part as one of their last steps on some of the diagnostic trees. This is great if you own a known good spare part.
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Old 08-02-2018, 09:43 AM   #26 (permalink)
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Black and Green - '98 Honda Civic DX Coupe
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Quote:
Originally Posted by MetroMPG View Post
... I put the old coil back in and it fired right up....
But early in this thread I think you got the same results sometimes and then the problem returned a few starts down the line, no? with the "bad" coil, I would wait to see if it returns. Seems like it might.

Quote:
Originally Posted by MetroMPG View Post
...I should fill up now to lock it in. Put some of this silliness on the next tank.
Yes, definitely. Take that bummer off the list of bummers in trouble shooting.
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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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Old 08-02-2018, 10:42 AM   #27 (permalink)
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Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 55.97 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 70.75 mpg (US)

Appliance car - '14 Mitsubishi Mirage ES (base)
90 day: 67.41 mpg (US)
Thanks: 3,997
Thanked 6,889 Times in 3,574 Posts
Quote:
Originally Posted by California98Civic View Post
But early in this thread I think you got the same results sometimes and then the problem returned a few starts down the line, no?
Correct.

Quote:
with the "bad" coil, I would wait to see if it returns. Seems like it might.
I'm hopeful.

One other thing I thought of: a simple run of cold starts might not be a valid test. I need to actually drive the car: heating the coil up might be part of the problem? I'll be using it again this weekend. (And I did have a couple of longer drives with the known good coil.)

For those still keeping track at home:

- Trouble-free cold starts on the Firefly's coil: 5/5
- Trouble-free cold starts since re-installing the Metro's coil: 2 (so far)

Quote:
Yes, definitely. Take that bummer off the list of bummers in trouble shooting.
Done!

First kilotank (1k+ km = 620+ miles) in the beater Metro: 72 MPG US!
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Project MPGiata! Mods for getting 50+ MPG from a 1990 Miata
Honda mods: Ecomodding my $800 Honda Fit 5-speed beater
Mitsu mods: 70 MPG in my ecomodded, dirt cheap, 3-cylinder Mirage.
Ecodriving test: Manual vs. automatic transmission MPG showdown



EcoModder
has launched a forum for the efficient new Mitsubishi Mirage
www.MetroMPG.com - fuel efficiency info for Geo Metro owners
www.ForkenSwift.com - electric car conversion on a beer budget
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Old 08-03-2018, 04:06 AM   #28 (permalink)
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Chorizo - '00 Honda Civic HX, baby! :D
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"We need a known good part."
"This is a Ford."
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Old 08-03-2018, 09:29 AM   #29 (permalink)
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Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
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Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 55.97 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 70.75 mpg (US)

Appliance car - '14 Mitsubishi Mirage ES (base)
90 day: 67.41 mpg (US)
Thanks: 3,997
Thanked 6,889 Times in 3,574 Posts
- Trouble-free cold starts since re-installing the Metro's coil: 3 (so far)


Have I mentioned yet how much I hate intermittent problems?
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Project MPGiata! Mods for getting 50+ MPG from a 1990 Miata
Honda mods: Ecomodding my $800 Honda Fit 5-speed beater
Mitsu mods: 70 MPG in my ecomodded, dirt cheap, 3-cylinder Mirage.
Ecodriving test: Manual vs. automatic transmission MPG showdown



EcoModder
has launched a forum for the efficient new Mitsubishi Mirage
www.MetroMPG.com - fuel efficiency info for Geo Metro owners
www.ForkenSwift.com - electric car conversion on a beer budget
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Old 08-03-2018, 08:07 PM   #30 (permalink)
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Iíve had two coils fail in my LSJ before I upgraded them, and Iíve had two coil packs fail on my L61, before swapping to the one Iím running now... the failures have always presented as a constant misfire though...

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