Used Rx8 need help to diagnose.

samedi 4 juillet 2015

Hi,

First and foremost i would like to thank any of you that can help me in advance and would also like to thank the creators of this forum for all of us RX8 owners.

To start this off the car is an '04 RX8 with 55k miles on it,6 SPD manual, bought used.

When i got it the car was running fine but did vibrate and shake quite alot when i start it and when it hits the 1000RPM. That was all i had to complain about and i could deal with it no problem.

Now i have a couple? more problems showing up and it all started of after a flashing CEL light that came on and lasting for 5-10 seconds. I also got a smell of something burning in that process but the smell lasted maybe 5-10 seconds after the CEL and both never came back afterwards even trough a 3 hour trip yesterday.

The thing is, after that moment the car started to act like ****. Starts kinda well cold, accelerates and has all of its power until maybe 15-20 minutes into the drive and the more time i drive the worst it gets. I talked about the 3 hour drive i took ... the ride was scary as hell. Was afraid the car would die on me but to my surprise it did not. It had so low power i would say that i felt like i was driving a geo metro. Took around10 seconds to go from 1st gear to second with the pedal to the floor. Uphill driving was a battle to not stall it or having it going backwards. After that drive i parked it, went back and tried it 4 hours later and BAM it worked like a charm, for another 20-30 minutes then went back to lose power but not as bad as that 3 hour drive.

Also at 4500-5500 RPM i can hear a rattle/ping (metal on metal) type of noise, sometimes it last well over the 5500RPM i said but most of the time it stops at 5500RPM but only when hot. (Sound in the hot start video, time in the description)

Today i went and changed the 4 coils and i can tell you they were due.

Changed 2 T sparks plugs that were also bad (tested them and the spark was so low that i could barely see it).

This might be important but when trying to start the car while testing the plugs, it would take a couple of turns before any sparks would appear and that was one the new ones also.

Got an new battery and it seems as though my horn and alarm sound is getting weaker by the day (after 2 days, can you imagine.)

Oil was in my air filter (will change it tomorrow the store was closed this afternoon) so i ran the car without an air filter and it did seem to help a bit with the idle vibration.

After all this, it still does the same things and i am kind of wondering what else it could be at this point.

Hope the videos help a bit, sorry for my english as i do not use it fluently.


Cold start : Hot start : (important things in video description)
Low horn sound :


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