Maninder

Hi all,

I have a 2005 Mazda RX8 with a BHR ignition kit, Exoticspeed R2 exhaust. When I start my car and drive it from a cold start it works fine it revs up nicely and smoothly. However once the car becomes warm the rev becomes slower and around 5-6000rpm I start to get a little hesitation or jitter but does pass 6000 rpm quite slowly. I am wondering if it could be a clogged cat since it only happens once the car is fully warm. I also was getting the SSV solenoid code but cleared it and it hasn't come back.

Thanks for your help!

Redrotarycar

You have to test the valve , when is cold is fine,but when hot it might start failing,. Check that is connected well, the clip tends to preak off. If you can thy to clean it. But must likely you will need a new one. There are some info here in the forum, search it. Advise to you Do Not rev your rx when cold. That a rule.! Good luck

BigCajun

iTrader: (1)

If it's a bad cat you should have a solid CEL, usually preceded by flashing CELs for misfires.
If you didn't yet, get your OBD scanned, most auto parts stores do it for free.

gwilliams6

Engine Power Loss
• chokes as revs increase
o O2 sensor failure (too rich)
o MAF failure
o MAF disconnected
o e-shaft sensor fouled
o accessory belt fraying
• high end power loss (hard fuel cut)
o Rev limit reached
• high end power loss (jerky and stumbling)
o Ignition failure
o fuel pressure loss
o e-shaft sensor fouled
• high end power loss (smooth)
o Catalytic converter clog
o air filter clog
• low end power loss (smooth)
o Engine compression loss
• low end power loss (stumbles)
o Ignition failure
o front O2 sensor failure
• revs slowly but smoothly
o O2 sensor failure (too lean)
o catalytic converter clog
o air filter clog
• sudden power drop at a specific rpm
o Intake valving actuation problem
• trouble getting to redline
o Ignition failure
o front O2 sensor failure
o catalytic converter clog
o air filter clog
o e-shaft sensor fouled
o fuel pressure loss
o MAF failure

Supra1jz

unbolt the cat and drive it for a day.

unbolt the cat and put a flash light down in their see if its looks gray and loosened from its position or clogged tight.

BigCajun

iTrader: (1)

If you drive it to work allow plenty of time for getting pulled over by the cops.

Supra1jz

kitty cats pull over.

for real though the rx8 gets raspy higher rev with more load but once your on the bearings and in your highest gear these cars are quiet