Question about Mazda RX-8

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2oo3 mazda rx8 wont start turns over and is getting fuel started once and ran for 3 seconds then nothing

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  • ralph3 Nov 17, 2008

    Did some online research and remedied the problem. the no start was a result of a cold start and shut down flooding. I fixed it by following the factory deflooding procedure of depressing the accelerator pedal to the floor and crank for 10 seconds then let up and crank for 10 seconds I used a battery charger in start mode to keep the revs up. I did this procedure 3 times ending on a fully depressed crank. let the starter cool for a few minutes and starting on accelerator up it started on the next accelerator down crank kind of numb and skipping and smoking backed off the gas to about 2500 rpm and maintained until smooth. If that doesn't help others in the same situation there is another flood fix involving one of the two vaccume lines on the side of the motor. the front one is easier to access. Unplug and run a piece of rubber tube to a quart of transmission fluid. unplug the fuelpump fuse and crank until the engine sounds like it has compression ( being flooded it suffers from fuel wash, the over abundance of fuel is allowing compression to pass to other cylinders. the trans fluid stops the wash effect and creates compression again) still cranking replace the fuel pump fuse the motor should fire.reconnect the original vaccume line. WARNING when the engine fires IT IS GOING TO SMOKE LIKE NOTHING YOU HAVE EVER SEEN It is nothing to worry about the engine is fine run it until it stops smoking though it could take a while you might want to give the local fire dept. a heads up because a good samaritan might call them.

  • Anonymous Apr 28, 2009

    Removing the fuse really works

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  • 962 Answers

Have you checked if it has spark ? Check the spark by removing a sprk plug and connect it to the wire. Place the spark plug agains a groung. Then have somebody crank the engine. It should have spark.

Posted on Nov 12, 2008

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if u start an rx8 without letting the engine heat up fully before switching it off then it floods the engine with fuel, a rotary engine problem, ring the dealer and they will be able to sort you out, is costly though... ALWAYS LET THE ENGINE FULLY WARM UP! before switching off!!

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The RX8 has always been a bit problematic at starting, at least until Mazda started fitted uprated starters (~2006). The standard, weak starter motor spins the engine quite slowly, causing problems getting compression to start the engine.

There's various things to try...

DON'T pump the gas whilst starting - foot OFF the accelarator (might be beneficial to depress the clutch just to reduce the loading on the starter motor). Check all the RX8 owners' forums - standard advice.

DO use a confident turn of the key - keep cranking until it catches (but not for more than 10 seconds - in which case leave for 10 seconds before trying again) - don't just crank for a second or two, then retry. That's as per owner's manual.

DO ensure that you leave the engine to warm up ALWAYS before shutting off - to avoid fuel being left in the rotor - that affects compression badly if left any period of time, resulting in very poor starting (risk of flooding).

If non of the above helps, get a hot-engine compression check to ensure that the engine isn't shot. If the engine is okay, then consider getting an uprated starter motor, or 3rd-party replacement. Many 2004/2005s have had their starters replaced (I considered mine, although I've had no problem over winter :)


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HI check your air filter make sure is clean, replace spark plugs if fault whit fuel ,if thats the case also replace your oil and filter

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hopefully you didnt use too much starting fluid. you dont want youre rx8 to be a crack baby. but as ardyrr said it is common for plug fouling and packs going bad. check packs for discoloration on the back side. if present, replace packs. if plugs are fouled replace them too. wires are probably damaged too or next in line to go. and when replacing parts please use oem or performance parts. cheap aftermarket parts will only cause more problems in the near future.

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