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Mazda RX-8

3616 messages,  Last post on Apr 22, 2009 at 5:06 AM

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What is this discussion about? Mazda RX-8, Coupe


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#3559 of 3616
Re: RX8 Headlight Bulbs [plekto] by maltb
Jan 18, 2008 (3:40 pm)
Reply

Replying to: plekto (Jan 17, 2008 3:17 pm)

I understand that larger wire costs more and that they will use what is adequate, but I disagree that the bulb is being supplied with 80% of its demand.
 
I'm familiar enough with the business to know that this would not be the case and, in fact, a margin of over-specification is added.
 
Of course, if you have a roll of 12 guage wire and an ammeter, you could always test it and post your results of OE spec vs. Monster Cable (headlight wire of course).
#3560 of 3616
Re: RX8 Headlight Bulbs [maltb] by plekto
Jan 19, 2008 (9:58 am)
Reply

Replying to: maltb (Jan 18, 2008 3:40 pm)

Monster Cable is a gimmick, actually. All that matters is the gauge. Most headlights are wired up with 16 gauge wire when they really should be running 14 or 12. The makers don't care as long as it will work and not cause a safety issue. So you end up with wiring that is running at exactly 12V. The issue is as the wire ages, it goes from being just at that limit(cost cutting after all) to 11.5V and then 11V and so on. Often within a few months. Many makers ship cars that are already at 11.5V or so and don't care.
 
ie - the headlights light up and everything works and they saved some money. Also, running the bulbs undervoltage a bit, as long as they are within the spec for minimum wattage(technically 45W for a high beam, though 55W is considered standard) makes them last a bit longer, so you can use cheaper bulbs. Running 12V lamps at 11.5 drops their output by about 15-20% on average, but doubles their life.
 
So shipping the car with 11.5V lights that put out 50W instead of 55W, well, that still gets a pass by the DOT for light output and you saved a few dollars per car.
 
Kind of like OEM tires and brakes. It's something that works at a minimally acceptable level but that should be replaced as soon as possible if you're driving something other than a sportscar/it came with those upgrades.
 
Unfortunately the wiring harness isn't something that the average person can swap out like tires(okay they CAN, but for most people if it's not as simple as a screwdriver and a socket/plug they don't bother - go figure) Instead they typically get brighter bulbs. After all, it's $20 at the local Auto Zone and there's a huge wall of them all proclaiming how they will make your lights brighter...
#3561 of 3616
Re: RX8 Headlight Bulbs [plekto] by maltb
Jan 22, 2008 (3:46 pm)
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Replying to: plekto (Jan 19, 2008 9:58 am)

Maybe I'll need to do the test myself to get the answer.
 
Anyone have a nice inductive ammeter I can borrow?
#3562 of 3616
4 FOULED PLUGS by bullwinkle fan
Feb 05, 2008 (1:22 pm)
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My dealer tells me the ruff idle and miss is do to trailing coil and plugs gone bad " under warranty" BUT leading plugs are bad and not covered because there are fouled. Could the bad trailing coil and plugs have caused the leading plugs to go bad ? They want $320.00 for parts and labor for replacing leading plugs even tho they are right there replacing trailing plugs and coil !!! I mentioned this idle and miss to them 4 mo's ago and all they said was that its all controled by the computer.
#3563 of 3616
Re: 4 FOULED PLUGS [bullwinkle fan] by maltb
Feb 05, 2008 (4:17 pm)
Reply

Replying to: bullwinkle fan (Feb 05, 2008 1:22 pm)

What year and mileage?
#3564 of 3616
Re: 4 FOULED PLUGS [maltb] by bullwinkle fan
Feb 06, 2008 (11:13 am)
Reply

Replying to: maltb (Feb 05, 2008 4:17 pm)

I bought it in Feb. 2004 with a automatic and have 36700 miles. The dealer dropped the charges for the two plugs and labor from $320. to $213. because I pitched a fit and reminded them that I complained about the ruff idle and miss 6 months ago when I had the 30K service done.
#3565 of 3616
Re: 4 FOULED PLUGS [bullwinkle fan] by maltb
Feb 06, 2008 (12:46 pm)
Reply

Replying to: bullwinkle fan (Feb 06, 2008 11:13 am)

So were you not due to change the plugs in 800 miles anyway?
#3566 of 3616
Re: 4 FOULED PLUGS [maltb] by bullwinkle fan
Feb 22, 2008 (1:22 pm)
Reply

Replying to: maltb (Feb 06, 2008 12:46 pm)

The service rep checked and said recommended replacement of plugs was at 60K miles.I have a new post regarding a Loud Vibration when in gear and at a stop.
#3567 of 3616
Re: 4 FOULED PLUGS [bullwinkle fan] by duke15
Feb 22, 2008 (8:42 am)
Reply

Replying to: bullwinkle fan (Feb 22, 2008 1:22 pm)

RE: vibration when in gear and at a stop
 
-Do you have an auto or stick? There is a TSB for that with the auto, the stick has one too but if I remember correctly symptoms are different and the car is moving.
#3568 of 3616
Urgent Sat Nav Question by femedy
Feb 22, 2008 (2:28 pm)
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My fellow owners got a quick one really. Does anybody know the cheapest and/or the best place to get the sat Nav dvd compatible with the Rx8 2004 model?
 
Can i use a copy? does anyone have one?
 
Im in need....Help!!

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