Notices
Series I Trouble Shooting This is the place to learn more about or discuss any issues you're having with your RX-8

Cant figure it out- idling like crap

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old 05-30-2009, 01:15 AM
  #1  
Registered User
Thread Starter
iTrader: (2)
 
remixlp's Avatar
 
Join Date: Jul 2007
Location: San Diego, Ca
Posts: 335
Likes: 0
Received 0 Likes on 0 Posts
Angry Cant figure it out- idling like crap

About a month ago my motor got blown due to FI.
I ordered a new motor and returned my car to stock about 4 days ago. Here is the kicker.
I was driving today and my car stalled in traffic. I started it back up and it is idling rough and a loud knocking sound is coming from the passenger wheel. I checked the coils, sparkplugs and checked for vacuum leaks; All of which checked out fine unless I'm missing somthing.

Later i cleaned the MAF sensor and the car ran good for about 10 minutes, then back to running like crap.

ok I ran a test and got these error codes
PO113
PO171B
PO300B
PO507
PO302
I changed the coils and wires and the car is still shaking while idling. It seems to rev fine, but im still getting a misfire.

Last edited by remixlp; 06-01-2009 at 07:58 PM.
Old 05-30-2009, 07:56 AM
  #2  
U-Stink-But-I-♥-U
iTrader: (1)
 
carbonRX8's Avatar
 
Join Date: Mar 2005
Location: 12 o'clock on the Beltway.
Posts: 2,004
Likes: 0
Received 1 Like on 1 Post
Is the motor mount loose on the pass side? I have heard that the knock sensor likes the sound of an engine on busted mounts and will create all sorts of havoc. Like what you are seeing.

May I ask, why go back to stock? I figure it would have been a golden opportunity to boost higher.
Old 05-30-2009, 01:35 PM
  #3  
Registered User
Thread Starter
iTrader: (2)
 
remixlp's Avatar
 
Join Date: Jul 2007
Location: San Diego, Ca
Posts: 335
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by carbonRX8
Is the motor mount loose on the pass side? I have heard that the knock sensor likes the sound of an engine on busted mounts and will create all sorts of havoc. Like what you are seeing.

May I ask, why go back to stock? I figure it would have been a golden opportunity to boost higher.
The car just idles rough and the engine is seems to me rocking side to side slightly. I'm gonna check the motor mount today.

I went back to stock because the first motor blew lol.
Old 05-30-2009, 01:38 PM
  #4  
RX8 & RX7 owner
 
ZumnRx8's Avatar
 
Join Date: Mar 2008
Location: So. California
Posts: 5,172
Likes: 0
Received 3 Likes on 3 Posts
SHould have order a Street Port Engine from RotaryPower and put your FI back on, what did you do with your FI? Are you gonna sell it?
Old 05-30-2009, 01:42 PM
  #5  
Registered User
Thread Starter
iTrader: (2)
 
remixlp's Avatar
 
Join Date: Jul 2007
Location: San Diego, Ca
Posts: 335
Likes: 0
Received 0 Likes on 0 Posts
I already sold it. I plan on using a different kit soon.
Old 05-30-2009, 02:05 PM
  #6  
RX8 & RX7 owner
 
ZumnRx8's Avatar
 
Join Date: Mar 2008
Location: So. California
Posts: 5,172
Likes: 0
Received 3 Likes on 3 Posts
PETTIT or HYMEE? or HKS....<----pick this one
Old 05-30-2009, 07:36 PM
  #7  
Registered User
Thread Starter
iTrader: (2)
 
remixlp's Avatar
 
Join Date: Jul 2007
Location: San Diego, Ca
Posts: 335
Likes: 0
Received 0 Likes on 0 Posts
^^Maybe sometime in the future.

I added error codes from a test i ran today.
Old 06-01-2009, 10:57 AM
  #8  
Registered User
Thread Starter
iTrader: (2)
 
remixlp's Avatar
 
Join Date: Jul 2007
Location: San Diego, Ca
Posts: 335
Likes: 0
Received 0 Likes on 0 Posts
Any help?
Old 06-01-2009, 11:13 AM
  #9  
Former Sponsor
iTrader: (64)
 
Race Roots's Avatar
 
Join Date: Sep 2008
Location: Florida
Posts: 2,364
Likes: 0
Received 0 Likes on 0 Posts
PO113 - IAT sensor circuit high input ON 1 CCM
PO171B - System too lean ON 2 Fuel system
PO300B - Random misfire detected Flash/ON 1 or 2 Misfire
PO507 - Idle air control system RPM higher than expected ON 2 CCM


Should get you in the right direction...
Old 06-01-2009, 11:54 AM
  #10  
Registered User
Thread Starter
iTrader: (2)
 
remixlp's Avatar
 
Join Date: Jul 2007
Location: San Diego, Ca
Posts: 335
Likes: 0
Received 0 Likes on 0 Posts
Cleaned MAF
Replaced Coils, wires and plugs
Time to check fuel pump.
Old 06-01-2009, 11:57 AM
  #11  
Registered
iTrader: (4)
 
Phish806's Avatar
 
Join Date: Jul 2007
Location: Des Moines, Ia
Posts: 950
Likes: 0
Received 0 Likes on 0 Posts
What did you do with the blown motor??
Old 06-01-2009, 12:11 PM
  #12  
Registered User
Thread Starter
iTrader: (2)
 
remixlp's Avatar
 
Join Date: Jul 2007
Location: San Diego, Ca
Posts: 335
Likes: 0
Received 0 Likes on 0 Posts
in my friends garage.
Old 06-01-2009, 12:37 PM
  #13  
Registered
iTrader: (4)
 
Phish806's Avatar
 
Join Date: Jul 2007
Location: Des Moines, Ia
Posts: 950
Likes: 0
Received 0 Likes on 0 Posts
what actual damage was done to it? Apex seal or something more?
Old 06-01-2009, 07:42 PM
  #14  
Registered User
Thread Starter
iTrader: (2)
 
remixlp's Avatar
 
Join Date: Jul 2007
Location: San Diego, Ca
Posts: 335
Likes: 0
Received 0 Likes on 0 Posts
we have yet to open it. I just got pissed and bought a new engine which just happens to be pissing me off right now lol.
Old 06-01-2009, 09:09 PM
  #15  
Registered
iTrader: (4)
 
Phish806's Avatar
 
Join Date: Jul 2007
Location: Des Moines, Ia
Posts: 950
Likes: 0
Received 0 Likes on 0 Posts
Just out of curiosity ... you do a compression test on it?
Old 06-02-2009, 01:52 PM
  #16  
Former Sponsor
iTrader: (64)
 
Race Roots's Avatar
 
Join Date: Sep 2008
Location: Florida
Posts: 2,364
Likes: 0
Received 0 Likes on 0 Posts
Pull the Injectors and check them as well, the car running lean could be from that which would lead to misfires....

I was experiencing this same issue recently with a supercharged RX-8.

That is if you Fuel Pump is good.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Shankapotamus3
Series I Trouble Shooting
28
03-14-2021 03:53 PM
duworm
Series I Wheels, Tires, Brakes & Suspension
1
10-01-2015 04:57 PM
Danield97
Series I Trouble Shooting
1
09-30-2015 05:59 PM
Quiggs321
New Member Forum
19
09-30-2015 05:34 PM



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

Quick Reply: Cant figure it out- idling like crap



All times are GMT -5. The time now is 04:57 AM.