Cold idling problem
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Joined: Mar 2003
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From: Gold Coast Australia
Cold idling problem
cold start problem
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In the last 2 days i have got a surge between 1500 and 2000rpm .
Normally on a cold start my car revs to 2100 rpm then slowly settles down to 1500 , then to 1200 then down to 900 rpm with no problems .
The last 2 mornings i am seeing a swing between 2100rpm down to 1500 rpm then back up to 2100 rpm it does this several times and then finally settles down .
Theres no rough idling once i take off and car drives smoothly
Any one experience this ?? i have done 42,000km .
Maybe i need new spark plugs ??
bad cat sensor
Bad ignition coils
loose wiring
Any thoughts .
B....free
michael
--------------------------------------------------------------------------------
In the last 2 days i have got a surge between 1500 and 2000rpm .
Normally on a cold start my car revs to 2100 rpm then slowly settles down to 1500 , then to 1200 then down to 900 rpm with no problems .
The last 2 mornings i am seeing a swing between 2100rpm down to 1500 rpm then back up to 2100 rpm it does this several times and then finally settles down .
Theres no rough idling once i take off and car drives smoothly
Any one experience this ?? i have done 42,000km .
Maybe i need new spark plugs ??
bad cat sensor
Bad ignition coils
loose wiring
Any thoughts .
B....free
michael
Thread Starter
Banned
Joined: Mar 2003
Posts: 3,535
Likes: 2
From: Gold Coast Australia
Originally Posted by clydejmuggs
does the problem go away when you press the clutch?
If so the "In gear" or neutral switch is sticking. It will cause a rolling idle.
If so the "In gear" or neutral switch is sticking. It will cause a rolling idle.
I think this could be it because if i put in reverse straight away it does not cause the rolling idle
Now how do i fix this ???
Worshop manual says for a slow return to idle check following .
.ECT sensor malfunction
The thermostat is stuck open
throttle body malfunction
Air leakage from intake air system .
Eccentric shaft bypass valve stuck open
However i feel youhave found the correct answer to my problem .
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michael
Shifty Bastard.
Joined: Feb 2004
Posts: 4,835
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From: Melbourne, Australia.
Originally Posted by clydejmuggs
does the problem go away when you press the clutch?
If so the "In gear" or neutral switch is sticking. It will cause a rolling idle.
If so the "In gear" or neutral switch is sticking. It will cause a rolling idle.
Thread Starter
Banned
Joined: Mar 2003
Posts: 3,535
Likes: 2
From: Gold Coast Australia
Originally Posted by Gomez
We don't have a starter interlock switch on our six speed cars, Clyde. The Yanks have it...we don't.
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michael
Registered User
Joined: Jul 2005
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Originally Posted by Gomez
We don't have a starter interlock switch on our six speed cars, Clyde. The Yanks have it...we don't.
The switch on the top left of the tranny has nothing to do with the starter mate..
It tells the PCM if the car is centered in the shift pattern aka..neutral.
Thread Starter
Banned
Joined: Mar 2003
Posts: 3,535
Likes: 2
From: Gold Coast Australia
Originally Posted by clydejmuggs
The switch on the top left of the tranny has nothing to do with the starter mate..
It tells the PCM if the car is centered in the shift pattern aka..neutral.
It tells the PCM if the car is centered in the shift pattern aka..neutral.
So are you going to tell us how to fix this problem or are you going to continue jerking us around .
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michael
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i had the same problem, its in the workshop over the weekend - apparently a malfunctioning pcm, its being replaced on monday as the part needs to come from melbourne.
The rough idle is apparently due to a malfunctioning throttle sensor.... according to my service manager.
hope this helps load
The rough idle is apparently due to a malfunctioning throttle sensor.... according to my service manager.
hope this helps load
Thread Starter
Banned
Joined: Mar 2003
Posts: 3,535
Likes: 2
From: Gold Coast Australia
Yeah thanks i know what the problem is but they havent fixed it yet they dont want to believe me nor spend the money on the switch 
I will never buy another 1st or 2nd year production car especially from Mazda as its becoming quite obvious that not enough adequate REAL WORLD testing was done on the RX8 , THE PROBLEMS WE ARE GETTING I EXPECT FROM a Hyundia not from MAZDA
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michael
I will never buy another 1st or 2nd year production car especially from Mazda as its becoming quite obvious that not enough adequate REAL WORLD testing was done on the RX8 , THE PROBLEMS WE ARE GETTING I EXPECT FROM a Hyundia not from MAZDA
B...free
michael
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