Dumb Question Thread - no flaming or sarcasm allowed
#4501
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Yes. The 4-stroke crankcase oil weight, type, and brand mean literally nothing for the injected oil, because it's not under pressure, it's not at a "cold" 200F, and it is milliseconds away from being consumed by fire. The fact that the 2-stroke is labeled 'synthetic' and the 4-stroke is not means literally nothing for the two being consumed together.
#4502
Lol thanks. Do you monitor your coolant temps? How high did it get last summer?
I never said it's impossible. I just don't think the temp would shoot up by 46F in 2 mins after turning the car off. Last night I shut the car off at 208F and while it was off, the temp went to 217F, and then slowly came back down.
I don't have a religion lol.
Not true. I've shut off my car at 220F and the fans did not stay on. There's something else that triggers it. Could be high ambient temps or high RPM driving. My guess is, it only stays on when the coolant temp is over 226F at shut down.
If only someone could confirm this, or have info from Mazda
I don't have a religion lol.
Not true. I've shut off my car at 220F and the fans did not stay on. There's something else that triggers it. Could be high ambient temps or high RPM driving. My guess is, it only stays on when the coolant temp is over 226F at shut down.
If only someone could confirm this, or have info from Mazda
Last edited by Aston177; 03-18-2015 at 06:19 AM.
#4503
Water Foul
My car is a 2011, which makes it a Series 2. IIRC, there is some difference between the fan behavior in S2 cars.
I seem to remember fan A coming on at 207 and fan B coming on at 214 or something like that. Now you have me curious. I'll see what I can find the actual numbers so as not to spread rumors and conjecture.
Last edited by Steve Dallas; 03-18-2015 at 08:43 AM.
#4504
Too old for PC
Or where you're temp sensor it placed. Or the resolution and accuracy of your gauge.
#4505
Water Foul
I can't format this to look right in the limited amount of time I have right now, but this is from page 100 of the 2009 Service Highlights manual. There are several different conditions which govern the operation of the fans. The money shot appears to be: Engine compartment temperature high or ECT 110 ��C {230 ��F} or more. That's pretty non-specific.
Function
Cooling fan motor Cooling fan relay
Operation condition
No.1 No.2 No.1 No.2/No.3 No.4/No.5
Regular
driving
cooling
Stop Stop OFF OFF OFF �� ECT less than 97 ��C {207 ��F} and A/C
switch OFF
Low speed
rotation
Low speed
rotation ON OFF OFF
�� ECT less than 97 ��C {207 ��F} and A/C
switch ON (Refrigerant pressure
switch OFF)
�� ECT is 97—101 ��C {207—213 ��F} and
Refrigerant pressure switch OFF
Middle
speed
rotation
Middle
speed
rotation
ON ON OFF
�� ECT is 101—108 ��C {214—226 ��F}
�� ECT less than 101 ��C {214 ��F} and
Refrigerant pressure switch ON
�� ECT or above 108 ��C {226 ��F} and A/C
switch ON (Refrigerant pressure
switch OFF)
High speed
rotation
High speed
rotation ON ON ON
�� ECT or above 108 ��C {226 ��F} and A/C
switch OFF
�� ECT or above 108 ��C {226 ��F} and
Refrigerant pressure switch ON
After
cooling
Middle
speed
rotation
Middle
speed
rotation
ON ON OFF
�� When all the following conditions are
met:
— Ignition switch: OFF
— Drive-by-wire relay: OFF
— Metering oil pump: Other than
during ignition switch off mode
— Engine compartment temperature
high or ECT 110 ��C {230 ��F} or
more.
Forced
drive
High speed
rotation
High speed
rotation ON ON ON
�� During test mode (during test mode
with M-MDS) when the AP is
depressed.
Fail safe High speed
rotation
High speed
rotation ON ON ON �� When a failure occurs in the ECT
sensor.
Function
Cooling fan motor Cooling fan relay
Operation condition
No.1 No.2 No.1 No.2/No.3 No.4/No.5
Regular
driving
cooling
Stop Stop OFF OFF OFF �� ECT less than 97 ��C {207 ��F} and A/C
switch OFF
Low speed
rotation
Low speed
rotation ON OFF OFF
�� ECT less than 97 ��C {207 ��F} and A/C
switch ON (Refrigerant pressure
switch OFF)
�� ECT is 97—101 ��C {207—213 ��F} and
Refrigerant pressure switch OFF
Middle
speed
rotation
Middle
speed
rotation
ON ON OFF
�� ECT is 101—108 ��C {214—226 ��F}
�� ECT less than 101 ��C {214 ��F} and
Refrigerant pressure switch ON
�� ECT or above 108 ��C {226 ��F} and A/C
switch ON (Refrigerant pressure
switch OFF)
High speed
rotation
High speed
rotation ON ON ON
�� ECT or above 108 ��C {226 ��F} and A/C
switch OFF
�� ECT or above 108 ��C {226 ��F} and
Refrigerant pressure switch ON
After
cooling
Middle
speed
rotation
Middle
speed
rotation
ON ON OFF
�� When all the following conditions are
met:
— Ignition switch: OFF
— Drive-by-wire relay: OFF
— Metering oil pump: Other than
during ignition switch off mode
— Engine compartment temperature
high or ECT 110 ��C {230 ��F} or
more.
Forced
drive
High speed
rotation
High speed
rotation ON ON ON
�� During test mode (during test mode
with M-MDS) when the AP is
depressed.
Fail safe High speed
rotation
High speed
rotation ON ON ON �� When a failure occurs in the ECT
sensor.
Last edited by Steve Dallas; 03-18-2015 at 10:37 AM.
#4506
I only monitor my coolant temps at the track, but I can tell you that in North Texas in July and August, my fans come on more often than not when I shut off the car after driving around town. I plan to monitor my temps more closely this summer.
My car is a 2011, which makes it a Series 2. IIRC, there is some difference between the fan behavior in S2 cars.
I seem to remember fan A coming on at 207 and fan B coming on at 214 or something like that. Now you have me curious. I'll see what I can find the actual numbers so as not to spread rumors and conjecture.
My car is a 2011, which makes it a Series 2. IIRC, there is some difference between the fan behavior in S2 cars.
I seem to remember fan A coming on at 207 and fan B coming on at 214 or something like that. Now you have me curious. I'll see what I can find the actual numbers so as not to spread rumors and conjecture.
How are you monitoring your temps? How hot does it get in the summer?
I read my temps from an OBD2 scanner, so it's straight from the ECU.
I can't format this to look right in the limited amount of time I have right now, but this is from page 100 of the 2009 Service Highlights manual. There are several different conditions which govern the operation of the fans. The money shot appears to be: Engine compartment temperature high or ECT 110 ��C {230 ��F} or more. That's pretty non-specific.
Function
Cooling fan motor Cooling fan relay
Operation condition
No.1 No.2 No.1 No.2/No.3 No.4/No.5
Regular
driving
cooling
Stop Stop OFF OFF OFF �� ECT less than 97 ��C {207 ��F} and A/C
switch OFF
Low speed
rotation
Low speed
rotation ON OFF OFF
�� ECT less than 97 ��C {207 ��F} and A/C
switch ON (Refrigerant pressure
switch OFF)
�� ECT is 97—101 ��C {207—213 ��F} and
Refrigerant pressure switch OFF
Middle
speed
rotation
Middle
speed
rotation
ON ON OFF
�� ECT is 101—108 ��C {214—226 ��F}
�� ECT less than 101 ��C {214 ��F} and
Refrigerant pressure switch ON
�� ECT or above 108 ��C {226 ��F} and A/C
switch ON (Refrigerant pressure
switch OFF)
High speed
rotation
High speed
rotation ON ON ON
�� ECT or above 108 ��C {226 ��F} and A/C
switch OFF
�� ECT or above 108 ��C {226 ��F} and
Refrigerant pressure switch ON
After
cooling
Middle
speed
rotation
Middle
speed
rotation
ON ON OFF
�� When all the following conditions are
met:
— Ignition switch: OFF
— Drive-by-wire relay: OFF
— Metering oil pump: Other than
during ignition switch off mode
— Engine compartment temperature
high or ECT 110 ��C {230 ��F} or
more.
Forced
drive
High speed
rotation
High speed
rotation ON ON ON
�� During test mode (during test mode
with M-MDS) when the AP is
depressed.
Fail safe High speed
rotation
High speed
rotation ON ON ON �� When a failure occurs in the ECT
sensor.
Function
Cooling fan motor Cooling fan relay
Operation condition
No.1 No.2 No.1 No.2/No.3 No.4/No.5
Regular
driving
cooling
Stop Stop OFF OFF OFF �� ECT less than 97 ��C {207 ��F} and A/C
switch OFF
Low speed
rotation
Low speed
rotation ON OFF OFF
�� ECT less than 97 ��C {207 ��F} and A/C
switch ON (Refrigerant pressure
switch OFF)
�� ECT is 97—101 ��C {207—213 ��F} and
Refrigerant pressure switch OFF
Middle
speed
rotation
Middle
speed
rotation
ON ON OFF
�� ECT is 101—108 ��C {214—226 ��F}
�� ECT less than 101 ��C {214 ��F} and
Refrigerant pressure switch ON
�� ECT or above 108 ��C {226 ��F} and A/C
switch ON (Refrigerant pressure
switch OFF)
High speed
rotation
High speed
rotation ON ON ON
�� ECT or above 108 ��C {226 ��F} and A/C
switch OFF
�� ECT or above 108 ��C {226 ��F} and
Refrigerant pressure switch ON
After
cooling
Middle
speed
rotation
Middle
speed
rotation
ON ON OFF
�� When all the following conditions are
met:
— Ignition switch: OFF
— Drive-by-wire relay: OFF
— Metering oil pump: Other than
during ignition switch off mode
— Engine compartment temperature
high or ECT 110 ��C {230 ��F} or
more.
Forced
drive
High speed
rotation
High speed
rotation ON ON ON
�� During test mode (during test mode
with M-MDS) when the AP is
depressed.
Fail safe High speed
rotation
High speed
rotation ON ON ON �� When a failure occurs in the ECT
sensor.
Your fans stay on after shutdown probably because your engine compartment temp is high.
If your coolant is over 230F, I'd be very worried. What kind of track temps do you get and in what ambient temps?
Last edited by Aston177; 03-18-2015 at 11:06 AM.
#4507
Water Foul
I monitor my temps using Torque or Harry's Lap Timer via OBDII.
Track temperatures look like the the following. Last June, I saw a high coolant temp of 215.6F. The ambient temp was in the low 90s. Last month, I saw a high temp of 199.4F. The ambient temp was in the high 50s. I have stopped going to the track in July and August--it is too hard on the cars and too hard on me.
It is not uncommon for me to see a >210F ECT reading while sitting in traffic on a hot day with the AC on.
Track temperatures look like the the following. Last June, I saw a high coolant temp of 215.6F. The ambient temp was in the low 90s. Last month, I saw a high temp of 199.4F. The ambient temp was in the high 50s. I have stopped going to the track in July and August--it is too hard on the cars and too hard on me.
It is not uncommon for me to see a >210F ECT reading while sitting in traffic on a hot day with the AC on.
#4508
I monitor my temps using Torque or Harry's Lap Timer via OBDII.
Track temperatures look like the the following. Last June, I saw a high coolant temp of 215.6F. The ambient temp was in the low 90s. Last month, I saw a high temp of 199.4F. The ambient temp was in the high 50s. I have stopped going to the track in July and August--it is too hard on the cars and too hard on me.
It is not uncommon for me to see a >210F ECT reading while sitting in traffic on a hot day with the AC on.
Track temperatures look like the the following. Last June, I saw a high coolant temp of 215.6F. The ambient temp was in the low 90s. Last month, I saw a high temp of 199.4F. The ambient temp was in the high 50s. I have stopped going to the track in July and August--it is too hard on the cars and too hard on me.
It is not uncommon for me to see a >210F ECT reading while sitting in traffic on a hot day with the AC on.
You said the fans stay on after driving around in traffic. For how long?
I'm guessing your coolant doesn't go over 230F. The fans stay on probably due to high engine compartment temps But it's better to watch the coolant temp on hot days
Last edited by Aston177; 03-19-2015 at 09:58 AM.
#4509
I have what may seem a dumb question so it seems the place to ask.I picked up a p2259 code and since have learned where the componets in the air pump emission circut. Question: What is the difference between the air solenoid valve control circut high and the low?.
I made sure my butterfly valves on the lim are free and i checked the top of the three solenoids on the back of the motor which is the air pump solenoid and i wiggled and played with the other two the ssv and the other.I took the hose off the check valve and that connects to the air pump solenoid and blew through it both with the ignition on and off and the CEL went out and i drove for 2 days and it returned.I know i have to fix it which will probably be the solenoid replacement.
I'm just trying to betyter understand the system and i wanted to know what part isd the high end and what part is the lower end and where it is located on the motor.MY frustration comes with the knowledge that the only way i can change the solenoid is to remove the uim and i'm not sure if i am knowledgable and also i don't want to change it out only to find i still have a CEL so i guess i will take to the stealership and pay the $130.00 to pin point exactly which componet is the culprit here. Thanks.
I made sure my butterfly valves on the lim are free and i checked the top of the three solenoids on the back of the motor which is the air pump solenoid and i wiggled and played with the other two the ssv and the other.I took the hose off the check valve and that connects to the air pump solenoid and blew through it both with the ignition on and off and the CEL went out and i drove for 2 days and it returned.I know i have to fix it which will probably be the solenoid replacement.
I'm just trying to betyter understand the system and i wanted to know what part isd the high end and what part is the lower end and where it is located on the motor.MY frustration comes with the knowledge that the only way i can change the solenoid is to remove the uim and i'm not sure if i am knowledgable and also i don't want to change it out only to find i still have a CEL so i guess i will take to the stealership and pay the $130.00 to pin point exactly which componet is the culprit here. Thanks.
#4512
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All modern automotive lubrications are designed around a 200F operating temperature. The RX-8's ATF system includes a cooler that is joined with the radiator, and thus lets the coolant temperature help regulate the transmission fluid temperature.
It sounds like it's all working correctly.
It sounds like it's all working correctly.
#4513
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CEL Code P0443 - Purge Valve Solenoid
I have replaced the gas cap with a brand new one - light is still on.
I've read several, including - https://www.rx8club.com/series-i-tro...anyone-237722/
but I'm not entirely sure where the PVS is to see if there is anything loose or disconnected... thanks
I have replaced the gas cap with a brand new one - light is still on.
I've read several, including - https://www.rx8club.com/series-i-tro...anyone-237722/
but I'm not entirely sure where the PVS is to see if there is anything loose or disconnected... thanks
#4514
All modern automotive lubrications are designed around a 200F operating temperature. The RX-8's ATF system includes a cooler that is joined with the radiator, and thus lets the coolant temperature help regulate the transmission fluid temperature.
It sounds like it's all working correctly.
It sounds like it's all working correctly.
#4515
How do you know which motor is in a 2004 RX-8. I see there is an 19X HP motor and a 238 HP motor. I'm looking to buy one but want to make sure it has the 238HP motor. Can't find out how to tell the difference.
Thanks
Thanks
#4517
See here: RX-8 Help: Engine Variants
#4518
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Yes, it should I am not 100% on all European options/combinations however (I assume you are UK from your engine reference?), so make sure you check for that lower intake runner to confirm.
#4520
Water Foul
^ These installation instructions from Racing Beat might help. Otherwise, you will need to detail exactly what is going wrong and perhaps provide pictures.
Last edited by Steve Dallas; 04-03-2015 at 03:34 PM.
#4524