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Rx8 Faq

Old 05-18-2005, 01:31 PM
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CHIRP NOISE ON ACCEL OR ENGINE START

Applicable Models

Model Starting S/N Ending S/N

2004 RX8 00000000 ZZZZZZZZ



A chirp or squeak may be heard at times from the engine compartment. This can occur at engine start, or during engine acceleration. The noise can easily be mistaken for a squeaky accessory drive belt. The noise is actually caused by a slight momentary lean mixture, which results in engine detonation.(Pinging) The RENESIS rotary engine runs much leaner than previous rotary engines, resulting in improved fuel economy N lower exhaust emissions. This momentary lean condition will not cause engine damage. IMPORTANT! It is important to note that customers who use low octane fuel will experience a noticeable increase in engine noise. The RX8 requires premium fuel for best performance N engine life. FUEL: Octane rating (Anti-knock index): Premium unleaded fuel 91 (R+M)/2 method or above (96 RON or above) Fuel with a rating lower than 87 octane (91 RON) could cause the emission control system to lose effectiveness. It could also cause engine knocking and serious engine damage.



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Old 05-18-2005, 01:37 PM
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AFTERMARKET AIR INTAKE SYSTEM - ROUGH ENGINE IDLE

Applicable Models

Model Starting S/N Ending S/N

2004 RX8 00000000 ZZZZZZZZ



Some customers may complain of rough or poor idling condition. The RX8's airbox N intake system is specially designed to eliminate restriction N create a smooth airflow over the MAF. If the customer has installed an aftermarket air cleaner or intake system, the airflow stream to the MAF element may be disrupted N cause an improper MAF signal. This erratic signal results in a rough idle condition. Also, aftermarket air cleaner elements are sometimes coated in oil to better filter the incoming air. The oil from this type of elemnt may damage theMAF resulting in a poor idle or MIL related to the MAF. If a customer complains of a rough engine idle, see the repair instructions below.

1. Check for aftermarket air intake system or aftermarket air filter element. (Replace with factory system if necessary.)

2. If rough idle continues, check for additional bulletins / M-tips, workshop manual troubleshotting.

3. Confirm repair.
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Old 05-18-2005, 02:36 PM
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COOLING SYSTEM AIR BLEEDING

Applicable Models

Model Starting S/N Ending S/N

2004 RX8 00000000 ZZZZZZZZ



After performing repairs or any time cooling system coolant is drained, the cooling system must be purged of air. Use the following procedure below to remove air from cooling system:

1. Safely elevate front of vehicle on hoist. Elevating the front end only, at a steep angle will allow air trapped in system to escape easily.

2. Temporarily remove a coolant hose to the throttle body.

3. Fill coolant system with proper mix ratio of coolant / water per work shop manual.

4. Start engine N carefully monitor coolant level, topping off as necessary.

5. When coolant begins to flow from throttle body hose, air is bled from system.

6. Carefully attach coolant hose back to throttle body pipe. **Caution, coolant may be extremly hot!

7. Verify proper coolant level N add as necessary.

8. Check system for leaks.

9. Verify repair.
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Old 05-18-2005, 03:11 PM
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wtf? you have to tilt the car? you have to do that with the 3rd gens as well right?



All I do for the 2nd gen is remove the rad cap. Fill to the brim. Start the car. let her warm up. Rev her a bit. Put cap back in and done.
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Old 05-18-2005, 03:12 PM
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[quote name='j9fd3s' date='May 18 2005, 12:37 PM']AFTERMARKET AIR INTAKE SYSTEM - ROUGH ENGINE IDLE

Applicable Models

Model Starting S/N Ending S/N

2004 RX8 00000000 ZZZZZZZZ



Some customers may complain of rough or poor idling condition. The RX8's airbox N intake system is specially designed to eliminate restriction N create a smooth airflow over the MAF. If the customer has installed an aftermarket air cleaner or intake system, the airflow stream to the MAF element may be disrupted N cause an improper MAF signal. This erratic signal results in a rough idle condition. Also, aftermarket air cleaner elements are sometimes coated in oil to better filter the incoming air. The oil from this type of elemnt may damage theMAF resulting in a poor idle or MIL related to the MAF. If a customer complains of a rough engine idle, see the repair instructions below.

1. Check for aftermarket air intake system or aftermarket air filter element. (Replace with factory system if necessary.)

2. If rough idle continues, check for additional bulletins / M-tips, workshop manual troubleshotting.

3. Confirm repair.

[snapback]714695[/snapback]

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so u are saying return car back to stock before showing up at the mazda dealership?
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Old 05-18-2005, 04:10 PM
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Originally Posted by j9fd3s' date='May 18 2005, 09:27 AM


methinks if you added to the ground here it might be a good thing.




Grounding is a weak point on the RX-8 in general.

If you take a multimeter and measure the resistance from, say, the radio ground wire to the negative battery post, you will see several ohms.

This is not good.



I'm going to start adding ground straps whenever I have things apart on mine.
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Old 05-18-2005, 04:12 PM
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[quote name='j9fd3s' date='May 18 2005, 09:28 AM']WHINE OR SQUEAL NOISE FROM ENGINE AT IDLE

Applicable Models

Model Starting S/N Ending S/N

2004 RX8 00000000 ZZZZZZZZ



Some customers may complain of a high-pitched whine or squeal noise fromthe engine at an idle. The noise can be eliminated by raising the engineRPM slightly above idle. This is most likely caused by the primary port jet air nozzles and / or the metering oil pump air ports. The jet air nozzles are located in the primary port of each rotor. The jet air flow is acheived by using air flow from an area prior to the throttle plate. The metering oil injection nozzles also use this airflow prior to the throttle plate to assist oil flow into the engine. This creates a metered vacuum leak into the engine and may cause a high pitched whine at idle. This noise is considered to be a normal characteristic of the RENESIS rotary engine. Use the procedure outlined in the repair instructions to confirm noise is from the jet air or metering oil pump nozzles.



1.Confirm noise.

2.Remove engine cover.

3.Locate both air supply hoses for jet air nozzles and metering oil pump nozzles. Hoses are attached to the air duct located between the MAF and throttle body. Disregard hose that attaches to the oil filler tube

4.Confirm noise is caused by jet air or metering oil pump nozzles by temporarily pinching off air supply hoses using pliers.

5.No repairs should be attempted if noise is reduced or eliminated.

[snapback]714690[/snapback]

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I discovered this one by accident as I was installing my turbo system.

I never noticed it before, but with the open intake the noise was obvious.

If this really bothers anyone, a simple mini air filter will solve the problem.
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Old 05-18-2005, 04:15 PM
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[quote name='j9fd3s' date='May 18 2005, 09:31 AM']CHIRP NOISE ON ACCEL OR ENGINE START

Applicable Models

Model Starting S/N Ending S/N

2004 RX8 00000000 ZZZZZZZZ



A chirp or squeak may be heard at times from the engine compartment. This can occur at engine start, or during engine acceleration. The noise can easily be mistaken for a squeaky accessory drive belt. The noise is actually caused by a slight momentary lean mixture, which results in engine detonation.(Pinging) The RENESIS rotary engine runs much leaner than previous rotary engines, resulting in improved fuel economy N lower exhaust emissions. This momentary lean condition will not cause engine damage. IMPORTANT! It is important to note that customers who use low octane fuel will experience a noticeable increase in engine noise. The RX8 requires premium fuel for best performance N engine life. FUEL: Octane rating (Anti-knock index): Premium unleaded fuel 91 (R+M)/2 method or above (96 RON or above) Fuel with a rating lower than 87 octane (91 RON) could cause the emission control system to lose effectiveness. It could also cause engine knocking and serious engine damage.



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[snapback]714692[/snapback]

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This is because of the odd ignition scheme on the Renesis.

The trailing plugs effectively become the leading at idle. The transition back to normal firing causes preignition at throttle tip in.

Because the exhaust ports on the Renesis are not peripheral, there is no place for the apex seals to go should they be shocked. This means that preignition is not nearly as much a problem as it was on the 13b REW.
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Old 05-18-2005, 04:15 PM
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[quote name='Cheers!' date='May 18 2005, 11:11 AM']wtf? you have to tilt the car? you have to do that with the 3rd gens as well right?



All I do for the 2nd gen is remove the rad cap. Fill to the brim. Start the car. let her warm up. Rev her a bit. Put cap back in and done.

[snapback]714741[/snapback]

[/quote]



The RX-8 doesn't have a radiator cap. This makes it hard to bleed the conventional way.
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Old 05-18-2005, 04:58 PM
  #20  
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[quote name='MazdaManiac' date='May 18 2005, 03:15 PM']The RX-8 doesn't have a radiator cap. This makes it hard to bleed the conventional way.

[snapback]714775[/snapback]

[/quote]



It doesn't have a rad cap? so it has the AST thing like FDs?
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