Slow Acceleration
04-16-2014, 11:44 AM
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Slow Acceleration
Hey everybody I need done help I just bought a 2007 Grand touring Mazda RX8 Shiftable automatic and the acceleration is not were it's suppose to be its running 0-60 in about 11 seconds and I've changed plugs, wires,coils,cat I try and and get the rpms high from Neutral into drive but the rpms drop and it starts slow anybody know what's wrong or what I need to do to get it to the 6 seconds that it's suppose to run
04-16-2014, 11:49 AM
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FULLY SEMI AUTOMATIC
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how about simple stuff like air filter, clean ess and maf. any mods? whats the mileage? was it a gradual loss?
04-16-2014, 11:49 AM
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Keep in mind that you probably won't get it down to the 6 seconds. The automatic transmission version you have has 30hp less than a manual transmission one, and far less area under the curve. It's going to be slower. Not 11 seconds though, so yes, you still have something wrong with the car. Where did you get the coils from? There are counterfeits out there.
Engine Power Loss
- chokes as revs increase
- O2 sensor failure (too rich)
- MAF failure
- MAF disconnected
- e-shaft sensor fouled
- accessory belt fraying
- high end power loss (hard fuel cut)
- Rev limit reached
- high end power loss (jerky and stumbling)
- Ignition failure
- fuel pressure loss
- e-shaft sensor fouled
- high end power loss (smooth)
- Catalytic converter clog
- air filter clog
- low end power loss (smooth)
- Engine compression loss
- low end power loss (stumbles)
- Ignition failure
- front O2 sensor failure
- revs slowly but smoothly
- O2 sensor failure (too lean)
- catalytic converter clog
- air filter clog
- sudden power drop at a specific rpm
- Intake valving actuation problem
- trouble getting to redline
- Ignition failure
- front O2 sensor failure
- catalytic converter clog
- air filter clog
- e-shaft sensor fouled
- fuel pressure loss
- MAF failure
04-16-2014, 11:59 AM
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No mods 48,000 miles on it the take off was super slow then I changed out all the plugs (NGK) ,coils, and wires and it got way better I know the take off won't be that fast but I was expecting better than 11 seconds, I haven't changed the air filter I'll swap that out next
04-16-2014, 12:55 PM
#7
Check your catalytic converter as well. You can wait until night fall and take it out for a drive and then look under the car and see if it's glowing. Best method is to pull it down and inspect it though.
04-21-2014, 05:12 PM
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Still nothing guys did all of the above and the 0-60 is still at 11-12 second any more suggestions I replaced the air filter with a new k&n replacement one and very little difference cleaned MAF sensor and ESS
04-22-2014, 05:28 PM
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I try two diffrent ways one that dosen't work at all is I leave it neutral Get the RPM high but when I put it in drive the RPM drops to 0 and takes off slow ( traction is off ) and that was going to be another question I was going to ask if anybody knows what that was about and the second is I hold the break and gas the RPM never goes higher than 2k and then I let go of the break and still slow start and the easiest which is just stepping on the gas but same result
04-22-2014, 05:38 PM
#11
I try two diffrent ways one that dosen't work at all is I leave it neutral Get the RPM high but when I put it in drive the RPM drops to 0 and takes off slow ( traction is off ) and that was going to be another question I was going to ask if anybody knows what that was about and the second is I hold the break and gas the RPM never goes higher than 2k and then I let go of the break and still slow start and the easiest which is just stepping on the gas but same result
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