I have a 04 Mazda RX-8 1.3 rotory was running but rough then suddenly won't start anymore turns over good compression throwing code 7E8 and 7E9 with no p codes bit endine light is on any ideas

SOURCE: Mazda 2005 RX-8 wont start... ran yesterday, lights on & sounds

I have a 2004 that had the same problem. It sounds like the engine might be flooded. The best thing to do is to remove the fuse to the fuel pump. It will be listed under the fuse cover under the hood. Mine was a 20 amp but check to be sure. With the fuse removed, crank the engine for a minute to remove any fuel flooding the engine. Replace the fuse and crank the engine in 10 second intervals without touching the gas or you will reflood the engine. This process can sometimes take awhile and will drain your battery, so have it connected to an additional power source ( i.e. another car battery or jump box). When the car finally cranks over there will be a huge cloud of smoke so don't be alarmed when it happens. Lastly some words to the wise. This process CAN ruin your starter, but is essentially the same process that the dealership will you except that they will remove the spark plugs to drain the fuel and then charge you for new ones. If this process doesn't work then you probably need new spark plugs which is going to cost quite a bit. I was quoted upwards of $525 to fix this problem until I talked to a Mazda mechanic and found out how to do this myself. Just make sure that the engine is up to running temperature before turning the car off and you shouldn't encounter this problem again. I hope this helps you, and remember that if all else fails the dealer can fix it. It won't be cheap, but they will get it done.

I almost forgot, you HAVE to get the oil changed as soon as possible because there is probably gas in the oil now.

SOURCE: Need to tow 04 mazda rx 8

Top left and right corners of the front grill pull away to reveal the fixing holes. Make sure you WD40 the threads as Mazda coat the threads with paint. insert towing eyes and turn slowly unscrew and screw a bit at a time as you have a good chance of cross threading if you don't. Keep lubricating as you go. Make sure you take the plastic inserts off completely before towing as you will loose them when towing. replace when completed towing. Good luck and hope what ever the reason for towing it is not serious.

SOURCE: 1999 mazda 626 4cyl runs rough at idle , engine

You may have to dig deeper for a vacuum leak. It's possibly the intake manifold gasket. Try spraying some starting fluid around the intake manifold. Also try disconnecting the brake booster and plugging that hose, the diaphram in the booster could be ruptured, causing a vacuum leak. Check the PCV valve and hose too.

SOURCE: code po705 mazda protege lx shaking rough start

The Code you refer to is P0705 Transmission Range Sensor Circuit malfunction (PRNDL Input). It is a possiblility that because this code is present, this sensor is malfunctioning. If it is malfunctioning, that means the engine needs to "guess" the value that this sensor is responsible for. In most cases when this happens, the engine will go for a value that ensures the car runs. The engine will not try to run smooth or efficently, it will only try to run. It is my guess that if you have the sensor checked and replaced, the problem might be fixed. Please let me know if this answers your question and please rate my response. Thank you

Testimonial: "that is good. where is the trasmission range sensor circuit located "

SOURCE: DTC P0300, P0302, P0171, PO506

hey man i have the same problem... did you fix it.. i need help please email me at [email protected] if you have any info!