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Dumb Question Thread - no flaming or sarcasm allowed

RX-8 Discussion General discussion about the RX-8 that doesn't fit in one of the specialty forums.

Dumb Question Thread - no flaming or sarcasm allowed


 
 
 
Old 10-07-2017, 07:07 AM
  #6626  
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Originally Posted by Nisaja View Post
So I m helping a friend out. The car is a 2003. The battery died from leaving the OBD2 plugged in. After jump starting it, the car won t accelerate it starts, but it won t accelerate. We took it to an iffy mechanic and he said it s the alternator. I don t trust him. Can a bad battery or a bad alternator cause this?
What's the battery voltage when it's running? Shut off?

most likely reason is that it is in limp mode. Did you check codes?
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Old 10-09-2017, 04:40 PM
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Quickie...

Are cooling fans on their own dedicated CANbus module or are they run off the ECU? Is it possible something that causes modules to drop off the CANbus might've knocked them out?

Might explain some overheating I've had, otherwise. Everything else in the system seems good.

Traced the cause of the intermittent network errors to the OBD dongle I've been using to figure out what was causing the errors, so it's gone to the bin.
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Old 10-11-2017, 10:51 AM
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Originally Posted by dannobre
What's the battery voltage when it's running? Shut off?

most likely reason is that it is in limp mode. Did you check codes?
Turns out it was the alternator. We replaced it. Thanks for the help.
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Old 10-13-2017, 10:43 AM
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Stalls when warm. worth buying?

Hello!

i have a completely stupid question I'm hoping to have some experts help me. I'm looking to buy a Rx8 cause its a car i've been wanting for YEARS. i finally see one within my price range but it stalls when its warm. When i look at this car what would you guys recommend me look at to make sure its nothing super major? like is there a way to confirm its not doing this due to compression issues? some issues are ok since im trying to learn, but when i inspect the car how can I make sure it's not a huge major issue causing that problem?

Thank you guys in advanced for your help!
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Old 10-13-2017, 11:42 AM
  #6630  
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The only definite answer would be to get a compression test done. Don't buy one without a recent compression test.
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Old 10-13-2017, 12:04 PM
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Originally Posted by skyhighclaw View Post
Hello!

i have a completely stupid question I'm hoping to have some experts help me. I'm looking to buy a Rx8 cause its a car i've been wanting for YEARS. i finally see one within my price range but it stalls when its warm. When i look at this car what would you guys recommend me look at to make sure its nothing super major? like is there a way to confirm its not doing this due to compression issues? some issues are ok since im trying to learn, but when i inspect the car how can I make sure it's not a huge major issue causing that problem?

Thank you guys in advanced for your help!
It probably is due to compression issues. Even if it isn't, compression is probably suspect anyway.

As RotaryMachineRx said, the only way to know compression is to have a compression test done.
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Old 10-13-2017, 12:12 PM
  #6632  
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I'm back with another dumb question.

I have been trying to troubleshoot my passenger side door speaker not working. The car does in fact have the factory Bose system. I have replaced the relay in the amplifier as a precautionary measure. I am getting power to the speaker, I tested the plug going into the speaker with a lead tester and it illuminated for both pins. No sound comes from the speaker however, the passenger side Tweeter is working just fine however.

I have tried checking the impedance of the passenger side door speaker and wasn't able to get any reading, I check for continuity and I got nothing, when I shake the speaker I can hear what sounds like very small objects loose and moving around. Is it safe to say that the speaker is blown? Do I need to test any other readings at the plug that connects directly into the speaker for anything besides power going to it? Thanks in advance
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Old 10-20-2017, 01:50 PM
  #6633  
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Hello!

Thanks to you guys I didn't buy that piece of crap and I'm very likely buying a much better quality car this weekend. However I do have a question about premixing after i get it. I was thinking about getting the SOHN adapter. if i do would you guys still recommend me to premix? i heard in a couple youtube videos that the fuel injectors have a wider spray than the oil injectors do, so i was thinking if i do both that's the better way to go ESPECIALLY since im kinda forgetful and would not like to go without quality lubricant in the engine

Would Premixing and the SOHN adapter be too redundant? or would you recommend it having that with a absent minded fool like myself?

Thanks again for all your help.
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Old 10-20-2017, 02:49 PM
  #6634  
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Originally Posted by skyhighclaw View Post
Hello!

Thanks to you guys I didn't buy that piece of crap and I'm very likely buying a much better quality car this weekend. However I do have a question about premixing after i get it. I was thinking about getting the SOHN adapter. if i do would you guys still recommend me to premix? i heard in a couple youtube videos that the fuel injectors have a wider spray than the oil injectors do, so i was thinking if i do both that's the better way to go ESPECIALLY since im kinda forgetful and would not like to go without quality lubricant in the engine

Would Premixing and the SOHN adapter be too redundant? or would you recommend it having that with a absent minded fool like myself?

Thanks again for all your help.
The problem with S1 oil injectors is that there isn't one that lubricates the centre of apex seals, which S2 remedied by having another oil injector.

So yes, I would say there is still some benefits to premixing with SOHN.
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Old 10-20-2017, 03:36 PM
  #6635  
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Originally Posted by UnknownJinX View Post
The problem with S1 oil injectors is that there isn't one that lubricates the centre of apex seals, which S2 remedied by having another oil injector.

So yes, I would say there is still some benefits to premixing with SOHN.
I believe the middle hole just allows for less lubrication overall to be effective . If you increase the oil injected in the S1 ..... problem solved/no need for premix . It just uses more oil .
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Old 10-20-2017, 04:07 PM
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Originally Posted by Brettus View Post
I believe the middle hole just allows for less lubrication overall to be effective . If you increase the oil injected in the S1 ..... problem solved/no need for premix . It just uses more oil .
So if i was ok with using more oil, (meaning my premix will be minimal since i have a SOHN) there would theoritcally be no drawbacks? or would i risk over oiling?

If possible id rather err on the side of spending more than decreasing the longevity of the engine.
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Old 10-20-2017, 06:28 PM
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I'd imagine upping the oil injected in an S1 wouldn't make the spray pattern any more even. It'd fill out the areas that had been lean before, but it'd also over-oil the areas that hadn't had that problem.

If that's correct, then at best, you'll end up blowing some oil right out the exhaust (and into the cat if you still have it); at worst, that excess oil burns poorly and causes deposits.
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Old 10-20-2017, 06:50 PM
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Originally Posted by skyhighclaw View Post
So if i was ok with using more oil, (meaning my premix will be minimal since i have a SOHN) there would theoritcally be no drawbacks? or would i risk over oiling?

If possible id rather err on the side of spending more than decreasing the longevity of the engine.
I typically add only 10% more omp oil on the tunes I do. So you only use 10% more oil without any other drawbacks.
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Old 10-20-2017, 06:54 PM
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Originally Posted by IamFodi View Post
I'd imagine upping the oil injected in an S1 wouldn't make the spray pattern any more even. It'd fill out the areas that had been lean before, but it'd also over-oil the areas that hadn't had that problem.

If that's correct, then at best, you'll end up blowing some oil right out the exhaust (and into the cat if you still have it); at worst, that excess oil burns poorly and causes deposits.
The oil doesn't spray , it dribbles . And the oil is only a minor contributor to carbon deposits . Most of it is from the fuel.
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Old 10-20-2017, 09:19 PM
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Ok where is spare tire on these things

Is it like one of them space saving hide in glove box ones somewhere in this rx8??
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Old 10-20-2017, 09:33 PM
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Originally Posted by Airtruck View Post
Is it like one of them space saving hide in glove box ones somewhere in this rx8??
No spare...it is an option

There should be a kit in the truck with goo and an air compressor
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Old 10-20-2017, 09:35 PM
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Originally Posted by dannobre View Post
No spare...it is an option

There should be a kit in the truck with goo and an air compressor
I have to bring my truck? Or just have the car trailer follow me around?
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Old 10-20-2017, 09:38 PM
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Originally Posted by Airtruck View Post
I have to bring my truck? Or just have the car trailer follow me around?

I have more than 100K miles on the car and have never had a flat......it's not like the old days when tires failed regularly. I don't think I have had a flat on a street car for 20 years.
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Old 10-20-2017, 09:50 PM
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Headlight washers...

So replaced front bumper with used one but car didnt have headlight washers "american version? "
so used one has holes but no washers . what would be the best way to fill or cover? Ducktape not a option..
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Old 10-20-2017, 09:53 PM
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Originally Posted by Airtruck View Post
So replaced front bumper with used one but car didnt have headlight washers "american version? "
Originally Posted by Airtruck View Post
so used one has holes but no washers . what would be the best way to fill or cover? Ducktape not a option..

Get the washer motors they come with the covers...... Where do you live? What color is the car?
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Old 10-20-2017, 10:45 PM
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Car is dark metallic grey but bumper is pearl white.. Will be painting so cover color should not matter. Or guess i could find another bumper . use the washers to fill the holes or try and hook them up?
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Old 10-20-2017, 10:47 PM
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Added pic but has to go thru admin. Live in surrey bc. Car is dark grey metallic? Dont know what mazda calls it
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Old 10-21-2017, 01:29 AM
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Originally Posted by dannobre View Post
No spare...it is an option

There should be a kit in the truck with goo and an air compressor
And the spare takes up a lot of space in the trunk.

Speaking of the goo, make sure yours is not expired. When I got my car, the goo had been expired for 5 years. Yep.

The goo is pretty pricey from the dealers, but you can buy any kind of goo from any auto store for a lot cheaper.

Originally Posted by Airtruck View Post
I have to bring my truck? Or just have the car trailer follow me around?
Dan meant trunk. Just a typo.

Originally Posted by dannobre View Post
I have more than 100K miles on the car and have never had a flat......it's not like the old days when tires failed regularly. I don't think I have had a flat on a street car for 20 years.
You never know... I have a buddy with an Ecoboost 'stang. I was having dinner with him, and then we both drove back to uni to do homework. When he got to the parking lot, he got a low tire pressure warning. Turns out, he got a nail stuck in the sidewall of his rear left tire.

That was back when I had the Accord(with a donut, but without a repair kit), and being a dumbass he was, he didn't have the Owner's Manual with him. He ended up having to leave the car in the uni and got it towed the next day.

Originally Posted by Airtruck View Post
Car is dark metallic grey but bumper is pearl white.. Will be painting so cover color should not matter. Or guess i could find another bumper . use the washers to fill the holes or try and hook them up?
Just look for a set from an online junkyard.

Last edited by UnknownJinX; 10-21-2017 at 01:36 AM.
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Old 10-21-2017, 03:49 AM
  #6649  
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I agree, try to source the kit online and/or in this forum. Worth the added piece of mind. My 2008 40th anniversary edition came with the spare tire kit. Haven't had to use it yet, but glad it is there. I additionally always carry a couple of cans of fresh tire goo from a reputable brand, because I am sure the tire goo in the stock kit has expired by now. If it is not sidewall damage, often the tire goo can get you home or to a service shop. Saved a few trips in the past.

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Old 10-21-2017, 01:28 PM
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Trying to understand the oil circuit. Series 2, if that matters here.

So, downstream of the pump, it splits into two circuits, right? One for the MOPs and one for the engine internals?

I know the oil that circulates through the internals eventually comes back into the sump. What about the oil injected by the MOPs? Does all of it get burned and blown out the exhaust, or does some of it end up back in the sump somehow?
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