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Old 06-11-2014, 12:31 PM   #21 (permalink)
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Quote:
Originally Posted by johnlvs2run View Post
Well then the iridium plugs would increase mpg, due to faster pulses vs distance of coasting.
I never did pulse and glide, but anyway, the savings would come more from the longer lasting of the plugs than anything else.

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Old 06-11-2014, 02:29 PM   #22 (permalink)
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Originally Posted by Old Mechanic View Post
...make sure you adjust the valves if your're going to pull the cover anyway.
It was my impression that modern hydraulic valve lifters were self adjusting. Is this not the case? None of the cars I drive indicate a valve adjustment interval except for my motorcycle.
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Old 06-11-2014, 02:39 PM   #23 (permalink)
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This is a Civic, right? Changing the spark plugs is the easiest thing on these. Pop the hood, there they are in a row, right on top in front of you.
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Old 06-11-2014, 02:39 PM   #24 (permalink)
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My 94 had lash adjustments at recommended 30k intervals. Not sure aobut 99 but I think they still had lash adjustments.

http://www.civic-eg.com/causeforalarm/D16Y/index.php

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Old 06-11-2014, 03:14 PM   #25 (permalink)
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I had my then-girlfriend change the spark plugs on my Civic. If you change the wires, they always say to change one at a time, so you can keep the order correct, but I forgot that step, and we seemed to figure it out well enough.

It was amazingly easy.
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Old 06-11-2014, 03:42 PM   #26 (permalink)
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Old 06-11-2014, 03:55 PM   #27 (permalink)
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A 4 cylinder is easy. It wasn't quite as easy on my 1973 Jaguar XJ12 12 cylinder.
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Old 06-11-2014, 06:13 PM   #28 (permalink)
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• The physical layout/arrangement:

A↑ (right bank: 1A..2A..3A..4A..5A..6A)

← FRONT of ENGINE

B↓ (_left bank: 1B..2B..3B..4B..5B..6B)


• The firing order: 1A..6B..5A..2B..3A..4B..6A..1B..2A..5B..4A..3B


It's really funny what seemingly useless numerical sequences a motorhead will remember, like my 340/6BBL (LA) engine: 1-8-4-3-6-5-7-2.
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Old 06-11-2014, 06:28 PM   #29 (permalink)
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On my civic, platinums were -5.78mpg. Iridiums were -2.83mpg. Best were the stock v-power. Pump neutral, but butt happier with indexing.
This is on a lean burn engine that is very sensitive to spark changes. Haven't tried swapping out since I added the msd though. Can, they're near new collecting dust on the shelf.
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Old 06-11-2014, 06:31 PM   #30 (permalink)
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acceleration

Is acceleration faster with platinum & iridium plugs?

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