Notices
New Member Forum A place for new members to get their feet wet

Slow Acceleration

Thread Tools
 
Rate Thread
 
Old Apr 16, 2014 | 11:44 AM
  #1  
JRX8D's Avatar
Thread Starter
New Member
 
Joined: Apr 2014
Posts: 7
Likes: 0
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
Reply
Old Apr 16, 2014 | 11:49 AM
  #2  
200.mph's Avatar
FULLY SEMI AUTOMATIC
iTrader: (9)
 
Joined: Aug 2008
Posts: 5,983
Likes: 3,446
From: BALLS DEEP
how about simple stuff like air filter, clean ess and maf. any mods? whats the mileage? was it a gradual loss?
Reply
Old Apr 16, 2014 | 11:49 AM
  #3  
RIWWP's Avatar
Registered
iTrader: (2)
 
Joined: Oct 2007
Posts: 16,684
Likes: 267
From: Pacific Northwest
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
Reply
Old Apr 16, 2014 | 11:59 AM
  #4  
JRX8D's Avatar
Thread Starter
New Member
 
Joined: Apr 2014
Posts: 7
Likes: 0
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
Reply
Old Apr 16, 2014 | 12:03 PM
  #5  
RIWWP's Avatar
Registered
iTrader: (2)
 
Joined: Oct 2007
Posts: 16,684
Likes: 267
From: Pacific Northwest
clean the MAF and the ESS, reset the fuel trims and ESS. See where you are.
Reply
Old Apr 16, 2014 | 12:10 PM
  #6  
JRX8D's Avatar
Thread Starter
New Member
 
Joined: Apr 2014
Posts: 7
Likes: 0
Will do thanks for the help guys
Reply
Old Apr 16, 2014 | 12:55 PM
  #7  
kevinande's Avatar
Day Walker
 
Joined: Oct 2011
Posts: 585
Likes: 18
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.
Reply
Old Apr 21, 2014 | 05:12 PM
  #8  
JRX8D's Avatar
Thread Starter
New Member
 
Joined: Apr 2014
Posts: 7
Likes: 0
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
Reply
Old Apr 21, 2014 | 05:14 PM
  #9  
Brettus's Avatar
Boosted Kiwi
iTrader: (2)
 
Joined: Apr 2006
Posts: 20,848
Likes: 1,804
From: Y-cat-o NZ
Originally Posted by JRX8D
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
How are you launching it ? Autos don't do very well when you just stomp on the pedal ...................
Reply
Old Apr 22, 2014 | 05:28 PM
  #10  
JRX8D's Avatar
Thread Starter
New Member
 
Joined: Apr 2014
Posts: 7
Likes: 0
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
Reply
Old Apr 22, 2014 | 05:38 PM
  #11  
Brettus's Avatar
Boosted Kiwi
iTrader: (2)
 
Joined: Apr 2006
Posts: 20,848
Likes: 1,804
From: Y-cat-o NZ
Originally Posted by JRX8D
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
Sounds like you need a launching lesson to me ..... I'm not sure how it's supposed to be done - maybe someone else can chime in here ..............
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
cliffkemp
Series I Trouble Shooting
8
Dec 24, 2024 10:48 AM
Shankapotamus3
Series I Trouble Shooting
28
Mar 14, 2021 03:53 PM
Eliseo Esquivel
RX-8 Discussion
2
Sep 30, 2015 08:28 PM
jasonrxeight
RX-8's For Sale/Wanted
2
Sep 30, 2015 01:53 PM
Racingjunkie
Series I Wheels, Tires, Brakes & Suspension
2
Sep 29, 2015 05:05 PM



You have already rated this thread Rating: Thread Rating: 0 votes,  average.


All times are GMT -5. The time now is 05:10 PM.