Hi everyone i am juan i just Got a 04 rx8 and everything was going well till last week it turned off on me and sense then is being hard i replaced plugs cables coils air pum air pump relay battery check compression is good fuel pump is good ... here is what ut does sometimes will run and star good like a charm will go to store and comeback put sometimes won't even maked out off garage and won't even turns on till like 30 minutes later HELP PLEASE

 

How did you test the compression and how did you test the fuel pump?

 

fuel pressure should be around 60 iirc and you need a rotary comp tester to get a good reading on compression. you can get an idea with a normal gauge but its not accurate

 

what is the CAT

 

CAT refers to your catalytic converter.

 

hi i replaced air pump and rely and still the same no idea what is the problem you happen to know whas is the CAT

 

Ok thanks

 

You think thats mi problem because i replaced al ignition stuff even did a dicarb on it and still sometimes will run great and sometimes nat even outside mi garage and sometimes iff turned off will take about 30 min to start again

 

No problem.

 

It's possible. I'd also check your MAF (mass air flow) sensor. How many miles?

 

Did clean it and still same goin crazy

 

Miles ar 118

 

Tanks for helping guys well the fuel pump pressure did remuve the seat and unplugged the gas line then add a little imagination and add old part because it doesn't have a place to checkppressure on the car at less tha i know and then the compression i used a regular tester it reads 155 but call a mechanic and he tested it and he said is eexcellent the check the spark on the coils and 2 off theme iget a good spark and on the other 2 is little but replace all and cables sparkspplugs crankshaft sensor battery air pump and relay

 

check fuel pressure under the hood. theres two hard lines not far from the oil filter. one has a red clip and the other is blue. its recommended to replace them if you remove them. the red on is the one you want to connect the pressure gauge to iirc.

when you checked comp with the regular tester did you take out the valve? after you do that you should see three even pulses on the gauge

 

Ok th the pump you can check with a electric tester tha connects to the battery or unplugged and then test with battery and the relay is near the light under the computer and you'll see another black box the under this one youl see it

 

Please keep to just 1 thread discussing the problem, breaking up the discussion in different threads all over the forum is only going to cause confusion for everyone. I moved the rest into this thread.