Colton

Okay i have a few question about my newly bought 05 rx8 automatic. First off my 02 sensor code came on i came to one of these threads an it told me to reset the computer before buying a new 02 to make sure thats the problem. well the code has not come back up for my 02. So does that mean its fine?
Second would be i was reading and someone was saying they couldnt get there rmps to go to 9k well i tried to see if mine would an it actually stops at like 8k rpms is that normal?
Third how do you know if your fuel pump is bad?
fourth ill start up my car in the morning an head to the gas station not but 5 miles away kill my 8 an fill him up when i get back in to start em up he wont start i usually have to wait 5-20 min. Now ive read a little bit on it. Saw some stuff that said it was not uncommon its a warm start. But no one has said if it is good or bad. if this is damaging my 8. Also Now since im having to hold my key for 10 sec while trying to get him to kick over at a warm start is this messing up my starter as well or ignition?
last but not least someone told me since i have a rotary engine i cant have misfires is this true? reading other threads on here an they are talking about misfires and i believe i have one?

Loki

iTrader: (1)

Welcome aboard. Continue reading, you have some catching up to do...

O2 sensor: if the code hasn't come back, don't worry about the sensor. But keep reading...

9k rpm: you have an automatic, the automatics's redline is 7500 or so.

Third how do you know if your fuel pump is bad?
Sometimes there are no symptoms until it stops completely, sometimes the car will die during a long drive and need to cool down.

Trouble starting the car when warm: this is the big one. I don't want to alarm you, but it's a common sign of low engine compression, which means new engine time. It's not damaging to your 8 by itself, but it indicates that your 8 is not happy.

Usually we recommend a new buyer to have a compression test done before purchase to avoid this kind of situation. Try to find a rotary specialist and have them perform the test (and give you options on repair if necessary). Do NOT go to some random mechanic, most of them don't know rotaries.

Whoever said you can't have misfires doesn't know what they're talking about, so don't talk to them again. You can, you know you have it when your check engine light flashes, and they're the first sign of trouble.

A very common failure point are the ignition coils. Get that compression test, and whether you get a new engine or not, check the condition of spark plugs and age of coils. If age is unknown or above 25k, replace (or better yet, have them tested).

Colton

Thank you loki.. An awsome all very helpful. i Did get a compression test by the mechanic of the auto dealership. they told me the compression were reading at 100psi for the top two spark plugs then when i asked about the bottom two he told me you only have to check two for a rotary engine. i took his word on it it seemed like he knew more then me at the time. An at the time i was to in love with the car to not believe him... An dont worry i have already came to the conclusion i might need a new engine an this dealer just screwed me out of 5 grand.. but unfortunately that might have been a little to late when i did realize it. i just loved the car way to much to pass it up.
An so there is only one factor though to it not starting up on a warm engine an that is the compression is low? an ill need a new engine? there is no way around that maybe a cheaper way in stead of just a new engine maybe like one part in the engine is all i need to fix in order to restore that compression? hope this isnt a stupid question

Loki

iTrader: (1)

He's correct, you only need to check 2 of the holes. 100psi could be good, could be bad, depends on what rpm that was at and what was used to test it. If they used a regular compression tester for regular cars, it's not a complete result. Look up how this engine works, you have 3 faces on each of the 2 rotors. A proper rotary tester will tell you the compression of each face. A regular tester will tell you the maximum of the 3 faces.

The good news is you *can* still start the car. One thing you could do is get an upgraded 2.0KW starter from 2008+ RX8s. It spins faster and while it won't fix anything, it will help you start the car more easily. And definitely check/replace the ignition like I mentioned.

Only a full rebuild fixes poor compression for any length of time. Do it right or do it twice

Colton

Thank you so much man!!! I will put this all into use tonight.. i apperciate it so much. oh yea one more thing. what kind of ignition should i get? let me just tell you im a cheap guy. meaning i dont have much money but i want to buy something that is reliable an cheap

Williard

iTrader: (18)

The only cheap option is stock.

Otherwise, spend what's needed and buy the BHR kit.

Travis

Colton

okay awesome

Loki

iTrader: (1)

Go to AutoZone or NAPA, they should have BYD brand with lifetime warranty. That will do for the next 25k miles or so. Spark plugs -- there is really only 1 kind that fits in this car.

But before you go spending money, just make sure you want to keep this car and invest in the engine, etc.

Williard

iTrader: (18)

Also, make sure you put the plugs in the correct holes.

I.e. trailing to trailing, leading to leading.

I've seen em swapped.

Hell I even missed one being swapped and I cleaned the damn things.

So, it happens

Travis

RX8Soldier

iTrader: (24)

I recommend reading the new and potential owners thread found at the top of the new members forum in the stickies.

Solarurf

Duralast Starter 19424 - Read Reviews on Duralast #19424

That's the starter that I use atm, it's not that expensive and from my experience it works pretty well, if you haven't already spent the money on a different starter and you're still debating you could maybe start with this one
It's only a 1.8kw starter but it should definitely help out with starts.

Alisha Williams

Hey guys I'm having a lot of trouble with my car. So when I bought the car the clutch went out a week after I bought it. Replaced that, wouldn't start so we replaced the starter and battery, checked alternator also and it's fine. Then it started overheating, replaced radiator and cooling fans then replaced the water pump and thermostat. Had the car running perfectly then I wen. Home and changed cuz I was all greasy from that mess. Went back out to my car and it wouldn't start. I couldn't even push start and pop the clutch. Checked the spark plugs had a leading spark plug that was missing the internals, basically just a piece of plastic, I replaced that, still nothing. Assumed I flooded the engine, went through the de-flooding process... still nothing tried to jump start it just for grins... nothing... any ideas?

UnknownJinX

I would assume you have a Check Engine Light on, so get an OBD II reader and read the codes. Maybe that will give you some insight.

Alisha Williams

Nope. No check engine light

NotAPreppie

Wait, can you post a photo or better describe the faulty spark plug?

If the internals were missing, where did they go? If they fell out, that's bad but not awful. If they went in then you're going to have a bad time.

Alisha Williams

I don't know where they went but I was able to replace it with an entirely new spark plug.

UnknownJinX

When you say no start, do you hear the car cranking or just absolutely nothing?

Is the battery good? Good to make sure some basic stuff doesn't get overlooked.

And spark plugs are not made of plastic - they are made of metal and ceramic. Plastic won't be able to take the heat from the engine. Heck, some metals(including copper) won't be able to stand the heat. Can you show some photos of the broken one?

stucky22

iTrader: (1)

Try the coils and plugs. Downstream and upstream make a difference as well.