hi all i have a auto 2005 rx8 done 90300 km. im having the misfiring issues. its one where the revs drop below 1000 rpm and close to 500 rpm all of a sudden its misfiring this is mostly when im stopped at the lights or when the car is parked but the engine running mostly when it is hat after driving for a while ...

the issues is that i have had all the common problems look at
so far i have had these replaced

Spark Plugs
Coil Pack
HT leads
Manifold solenoid
Cat removed and a hi flow one put in
Compression test was done and it came out fine also
engine mounts was replaced(due to the vibrations)
secondary injectors replaced
Full service done on it also (oil, filter, air filter etc)

above all this im not getting check lights for the misfiring, got told by the workshop that its not the ssv not sure if they checked it or not but generally will have the CEL light on.
also checked the MAF sensor it looks normal no dirt or anything.


Pleases help running out of ideas and money mostly lol

 

Gee you have just about done what I would have suggested..

Have you checked and cleaned the Throttle Body?
I would also makes sure you have no vacuum lines missing, unplugged or crossed.

Have you reset ECU?, disconnect Negative Battery Terminal, stomp on brake pedal about 20 times, reconnect cable. Start Car, Do the Power Steering reset by turning steering wheel all the way to the left and then all the way right.

 

Ash you got the 2 procedures mixed up... disconnect battery terminal\keep the brake pedal down to "discharge" the system quickly or...
Key on ON position, 20 quick brake pedal stomps, see the oil gauge sweep up and down.

 

mechanics reset the ecu after the injectors got done ...
but will look in to the throttle body cleaning nd the vacuum lines
thanx

 

Guys. I'm getting the CEL light (yellow light) since yesterday, but no noticeable change in driving or performance. Only issue is it hasn't been serviced for about 10k kms or about 12-13 months, though I have been adding oil, coolant etc. where do you guys get your cars serviced and how much does it usually cost. Thanks.

 

Pull the code, there are about 150 different reasons why you may have a check engine light ... from a loose gas cap to a Dirty MAF and everything in between


Symptoms do sound like it is an SSV. Are you running a catch can?

SSV cleaning: http://rezelse.blogspot.com/2011/10/...-resolved.html

 

dirty dirty maf
spank

 

lol ok my biggest problem is i dnt wana touch the 13b engine .. but last weekend i made up my mind lol whats the worst that could happen ither replace a motor. hmm well il jus have to save up and rebuild it ...

but any how the main issue was the miss firing so i cleaned the maf with the maf sensor cleaner and man did this make a diffrnce. it RAN smooth when i men ran i man she goes fine no dropping of the revs in d now it is running at 750 rpm constant ..... BUT lol BUT now there is a slight miss in p and n .... also now i have the vibration . where im at a light an bam if stopped for a while itl be vibrating .so new issues

Missfire in P and N
Vibrating at lights

oh and i also cleand the sensor thats located under the pulley like sprayed it with beta maf cleaner .

 

k i just realiseed i forgt to do the ecu reset would this have to do any thing...

 

Sorry NO catch cans yer

 

get one and reset your fuel trims