Just fyi, ive checked multiple forums but cant seem to find one that matches my problem. My problem is with my 04 RX8. it cranks but doesnt start, only starts with a push start and when its started i can drive it only aslong as im gassing it once i stop gassing it and try to let it sit in neutral the car turns off, i can hear the engine wanting to turn on when cranking but nothing have tried multiple times. Ive replaced spark plugs, leads, coils. still nothing. tried jumpstarting still nothing. I honestly dont know what the problem is and i need help. I will be trying a new battery and starter motor tommorrow, other than that im lost. The car has 219,000 kms on it also. Also the security light is on and flashing when in ignition.
Plz help its my first RX8
look at the attachment for video

 

If it push starts but doesn't start when you use the ignition - then your starter isn't engaging.

 

 

Is this happening when the engine is cold or hot?

If it's cold, then it could be the battery, especially if the cranking is slow.

If it's hot, then you have some serious issues, like low compression.

A video could help a lot.

 

If it's unable to hold idle (and start), there could be a few things:

• poor ignition (potentially miswired ignition if you had it replaced)
• poor compression -- at 219000km a compression test is in order anyway. This issue is MUCH worse when the car is warmed up, better when cold.
• baro sensor, maf sensor, eccentric shaft sensor or other engine sensor problems. Is the check engine light on and what is the code if any?
• large vacuum leak -- any loose hoses or open connections in the intake? any whistling sound from the engine while running? is the car intake original?

 

Does it run normally after it is push/pull started? Does it hold idle?

With that mileage it is likely the compression is low. Before you throw a lot of parts at it that would be the place to start..

 

https://www.rx8club.com/new-member-f...ls-pdf-245486/

Check the simple things first before you start throwing money at it. Have you checked for spark while it’s cranking over. The flashing security light may have something to do with it. Read up on your Security system. Specifically the Immobilizer. The 05 Manual is a little more specific on possible problems.

 

the engine hasn’t had a chance to heat up yet so it’s definitely cold. I’ll try compression testing soon.

 

I'm having similar problems as you. My motor has low compression, so testing yours is a must. The other things that I suspect are a bad fuel pump or a vacuum leak. Getting an upgraded starter will help you actually get it started until the compression's fully gone.

 

bumping

 

The video shows that you're cranking the engine but it sounds: (1) slow and (2) if you do have low compression - will be hard to start. Has the battery been checked out?

 

Ive tried multiple batteries so i dont think the problem is there, im going to compression test it asap and get back to you.

 

In order to get a test done the engine needs to be running. Possible its a bad starter and the engine is now flooded?

 

 

so I did a compression test and these are the results, also heard some very bad noises not really sure what it is .

 

a few things. pull both plugs in order to make it easy to crank, also make sure the throttle is wide open to cut fuel and to let in as much air as possible

 

Sounds like its not cranking over all that well. You are also using a standard compression tester on a cold engine. You won't get anything useful from those tests unfortunately. Really just want to make sure you can get it running at least first without having to push start it. I still suspect there is an issue with that starter. The engine only needs fuel, spark and compression to start and at the very least that test does show its making some compression. There must be something wrong with the fuel system or ignition system and the evidence seems to point to your starter. I've been able to start these engines with as little compression as 4.0 bar. Have you tried to just deflood it and start it? Here is a video for reference:

 

ok will try a new starter if that doesnt work ill start the deflood procedure thanks.

 

could this be another reason why it’s not starting missing hoses and connector to the airbox.

 

Is that the VFAD line? Having it open isn't helping for sure. You can just cap the vacuum line with a bolt, the VFAD isn't a critical component.

 

Its for VFAD. Here is a thread about it. Not super necessary but if its not attached, the vacuum line needs to be capped.

https://amp.reddit.com/r/RX8/comment...ere_important/

 

I wanted to revive this thread quickly for the initial topic, after a couple months of trying to fix little issues with my car I finally decided to try and get a friend to pull the car while I sat in it, put it in to second gear, gett up to around 15-20mph, and let go of the clutch, sure enough it started and had some issues at first but only cause of the air intake not being connected, after I put it on the next day and started the car it ran near perfectly.

Only problem is, I went to try and start the car again the next day and it just wouldn't, the starting RPM was higher than before but all it did was drain the battery, I had to pull start the car again, and it started, but then the next day it wouldn't start again, and it ended up draining the battery a second time.

The alternator has already been replaced, but the battery light is constantly on in the car, would it be worth replacing the wiring harness itself? Im not sure what else it could be,