cold start problem
07-17-2005, 04:55 AM
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cold start problem
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 .
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michael
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
07-17-2005, 05:43 AM
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I normally get one little surge like this on every start (see graph here https://www.rx8club.com/showpost.php...6&postcount=22).
07-17-2005, 06:44 AM
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Seems to be the same problem on my car however it goes up and down between 2100RPM AND 1500RPM at leat 9 times before settling .
could it be a blocked fuel line / injector that clears after a certain time ??
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michael
could it be a blocked fuel line / injector that clears after a certain time ??
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michael
07-17-2005, 08:03 AM
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Originally Posted by auzoom
I get this, normally in the afternoon not the morning. But Lock, didnt you just install the pipercross filter?
Andrew
Andrew
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michael
07-18-2005, 01:05 AM
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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
07-18-2005, 01:45 AM
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"Cold start" in Surfers Paradise...ho ho
It was -11 in Walcha thismorning Lock, but they say the cold weather is coming in the next day or two!
Have enjoyed the discussion in your Duck thread very much.
jack
It was -11 in Walcha thismorning Lock, but they say the cold weather is coming in the next day or two!
Have enjoyed the discussion in your Duck thread very much.
jack
07-18-2005, 01:57 AM
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Originally Posted by jax8
"Cold start" in Surfers Paradise...ho ho
It was -11 in Walcha thismorning Lock, but they say the cold weather is coming in the next day or two!
Have enjoyed the discussion in your Duck thread very much.
jack
It was -11 in Walcha thismorning Lock, but they say the cold weather is coming in the next day or two!
Have enjoyed the discussion in your Duck thread very much.
jack
i get cold when it drops to 15 , thats one of the reasons i left melbourne its wet and freezing .Going overseas to the PHILLIPINES for the month of September partly bussiness but mostly R&R THE TEMPERATURE THERE WILL BE 29 /30
The scuba diving on the island of MINDORO ,sabang beach puerto gallero , and i here the women are as hot as the weather :D
Glad you enjoyed my Duck thread its hard to get some of these guys to comment on controversial matters , so i was quite suprised that some actually came out and responded .
Hoping you and family are all well , are you coming to wakefield in october ??
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michael
07-18-2005, 04:50 AM
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Unfortunately not doing Wakefield, Lock. Initially thought it was the long w'end, when half our friends from Sydney want to come to "spring in Walcha". Timbo corrected me, however the Nats weekend is the Forster-Tuncurry Golden Oldies rugby carnival, an event I have not missed in over a decade.
Might this be the year to break the mould?
Might this be the year to break the mould?
07-18-2005, 05:33 AM
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Originally Posted by jax8
..Might this be the year to break the mould?
07-18-2005, 08:39 AM
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Originally Posted by xxup
You bet... We'll pick you up on the way through.. :D Are you closer to Brisbane or Sydney?
Myself and the Hymster meet up with Jack and his lovely wife last time , we went to Wakefield it was
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michael
07-19-2005, 04:56 AM
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Ditto on the cold weather.......bollocks
Yep get the old cold morning jiggle occasionally to. Especially if I roll backward on idle while it's warming, driveway has a slope and I swing around. Tend to get a small double surge.
Yep get the old cold morning jiggle occasionally to. Especially if I roll backward on idle while it's warming, driveway has a slope and I swing around. Tend to get a small double surge.
07-22-2005, 08:32 AM
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So what was the conclusion with this?
I get what I believe you are getting but only in the afternoons. I cant believe its the temp as its generaly about 5-10 degrees warmer in the arvo atm.
I have some Video showing this but cant get it up until tomorrow.
Andrew
I get what I believe you are getting but only in the afternoons. I cant believe its the temp as its generaly about 5-10 degrees warmer in the arvo atm.
I have some Video showing this but cant get it up until tomorrow.
Andrew
07-23-2005, 12:15 PM
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Originally Posted by auzoom
So what was the conclusion with this?
Andrew
Andrew
Keeping your foot on the clucth on cold starts wont give the rolling surge , as the gear selector is disengaged .
As to a more permenant fix i am still waiting for an answer .
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Michael
07-23-2005, 06:33 PM
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Hmmm.. Not sure what gear selector stuck really means.. Is the spigot bearing dry when it is cold and this is still turning the main shaft of the gear box??? 
Surely, the drag on the main shaft of the gearbox of a car in neutral would not cause this???
Very strange, but is it really a problem??? Are we worried that in the longer term that it will lead to a stall on cold start problem??
Surely, the drag on the main shaft of the gearbox of a car in neutral would not cause this???
Very strange, but is it really a problem??? Are we worried that in the longer term that it will lead to a stall on cold start problem??
07-23-2005, 10:45 PM
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Originally Posted by Lock & Load
The gear selector seems to be stuck upon cold starts causing this problem so
Keeping your foot on the clucth on cold starts wont give the rolling surge , as the gear selector is disengaged .
As to a more permenant fix i am still waiting for an answer .
l
Keeping your foot on the clucth on cold starts wont give the rolling surge , as the gear selector is disengaged .
As to a more permenant fix i am still waiting for an answer .
l
Do you mean you cannot budge the gearstick, which has been left in gear, so that when starting the car you have to press the clutch? (In which case, you need to have your gearbox examined) Gear position or selection should not affect the cold start program, although whether the clutch is engaged or not may, as it will be a load factor taken into account by the program.More importantly, I have more, colder cold starts...and I don't have this surging problem. Just the initial high idle, as previously discussed.
07-23-2005, 10:56 PM
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OK lets be more precise i am led to believe that the "in gear "or neutral switch is sticking ....causing this rolling idle situation on cold starts .
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michael
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michael
07-23-2005, 11:23 PM
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Hmmmmmm.........
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OK I want to check that this is the same problem.
htp://rx-8.harrisfamily.id.au/ColdStart.wmv (8Mb)
First part is the morning. Ambient Temp was 10 deg, I got in the car, didnt clutch, didnt move gearstick.
Second is at 7pm at night and amb read 17 deg. This time, before I started, I clutch, checked it was in Nuetral by moving gearstick left->right.
Sorry for the quality.
Personally I dont think this is a problem, its just bizzare. The first time I though something was wrong, but it happens so often its obviously something the car just does. I am just curious what it is.
Andrew
htp://rx-8.harrisfamily.id.au/ColdStart.wmv (8Mb)
First part is the morning. Ambient Temp was 10 deg, I got in the car, didnt clutch, didnt move gearstick.
Second is at 7pm at night and amb read 17 deg. This time, before I started, I clutch, checked it was in Nuetral by moving gearstick left->right.
Sorry for the quality.
Personally I dont think this is a problem, its just bizzare. The first time I though something was wrong, but it happens so often its obviously something the car just does. I am just curious what it is.
Andrew