Cold start = coughing, spluttering juddering for 1 minute, then fine

[ScarySquirrel]

Hi all,

The past 2 (cold) mornings my car has started first time, but the idle has been a bit all over the place. From the exhausts it was kind of "coughing" a bit, if that makes sense. The first time it happened I drove away and it was very juddery and losing power, then suddenly it was fine.

This morning, it did it again, and I just waited. I was by the exhausts and it was doing the same, then all of a sudden there was a final "splutter" and it began running perfectly.

Any ideas what this might be?

Spanks

 

[Rob]

What mods?

 

[ScarySquirrel]

JMS induction kit
Standard performance remap
Milltek cat back - with modified cat (2.5" exit), centre silencer removed

I think that's it. Nothing significant has changed though, it was fine with all of the above, then suddenly it's not.

 

[JoedotwasT5phy]

Idle control valve perhaps?

 

[MicKPM]

A '182 will most likely use an actuated/stepper controlled TB so no IACV.

I'd guess at either H02-1, CTS, CPS or faulty ignition system (Check for moisture in plug wells)

 

[Dunn]

Possibly a faulty lambda contributing to it?

And it's running fine once warm

 

[MicKPM]

If its say a faulty heater... maybe. Diagnostics Live Data FTW

 

[ScarySquirrel]

Yeah I think I just need to get it to a garage to see what fault codes it throws up. Thanks all.

 

[Christopher]

Mine does this every time.

Has done for years.

 

[Chris62]

I thought this was normal? Mine is like this most mornings.

 

[Rob]

I was going to say as far as I'm aware it's common and not a problem.

 

[Christopher]

Even our RS Twingo does it. It fact, it's worse!

Nothing to worry about.

 

[ScarySquirrel]

I know what you all mean, I had the kangaroo thing most mornings, but when I remapped the car this eliminated it completely. It's just odd that it hasn't been like this, and now when I start from cold it's really coughing and spluttering, more so that the 'normal' thing I would get before the remap.

It was better this morning, fine when I started, then spluttered a bit, but pulled away as normal. I'll keep an eye on it but won't worry too much for now.

 

[Rob]

It's probably just moisture from where it's cold outside mate

 

[!big ash!]

its prob fine man but jus incase pop it on live data an graph the coolant temp sensor from dead cold see if there is drop out's or silly start up temp like -2000 degree if u could graph 4 or more lines of data from cold then add front o2 sensor(make sure the o2s heater is going on an off it too), air intake temp sensor......... genrally go from there

 

[simonas]

was just about to my own thread about this but seems its pretty normal

 

[ScarySquirrel]

It did it again this morning, and I got a video of it. See how it suddenly just kicks into life towards the end of the video:

[youtube]ZxUj6NZVGVY[/youtube]

Normal?

 

[one in a million]

coil or spark, juddery motion on my girlfriends car was a coil had gone and it was horrible, soon as it was changed the car was perfectly fine again

 

[ScarySquirrel]

Thanks Chris.

How could I confirm 100% what it is? Would a £20 fault reader off ebay do the job?

 

[imprezaworks]

Chances are it prob will be the coil. In time it will get worse. Has the engine management light come on?

Dan

 

[ScarySquirrel]

Chances are it prob will be the coil. In time it will get worse. Has the engine management light come on?

Dan

The emissions light came on at the weekend, but only for a bit, then it went again.

 

[imprezaworks]

Ah right. Was going to say if it stays on get it diasgnosed at an auto electricians. or maybe it will rectify itself all on its own, you never know.

Dan.

 

[S76Pilot]

Did you ever find cause of this? I have exact same symptoms since changing exhaust today. Did a check with the stalk button and it comes with letter j. Injector problem? My eml is also on now and wasnt before today.

 

[S76Pilot]

My car now sorted! Diagnosed as faulty pre cat lambda. New one fitted, car goes much better. Just hope the fuel economy improves. We'll see what it's like in the morning when fully cold compared to the previous mornings.