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Author Topic: Start-up lumpy idle on 2.2  (Read 4385 times)

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Erzy

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Start-up lumpy idle on 2.2
« on: 20 May 2010, 17:59:35 »
Hi guys hope you can offer me some advice on the probable causes for my 2.2 lumpy idle on start-up.  Even after being sat in the sun my car idles lumpy when i start it up, the engine is much louder ( a bit blowey ) and there is a slight delay when i press the peddle before the revs increase and it nearly dies when i take my foot off ? There are no fault codes and if i take it for a drive and then re-start it it's as good as  :o I'm puzzled - please help !!
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tunnie

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Re: Start-up lumpy idle on 2.2
« Reply #1 on: 20 May 2010, 18:03:26 »
are you sure there are no codes stored? what are you using to read them?

Is coolant level ok, thats not dropping?
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Erzy

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Re: Start-up lumpy idle on 2.2
« Reply #2 on: 20 May 2010, 18:12:17 »
Cheers Tunnie, coolant level is fine had HG done three weeks ago - problem was there before. Friend of mine runs a garage and read the codes for me live data etc... said all is well, then as it had been running for a while it was fine again when i picked it up.
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vic

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Re: Start-up lumpy idle on 2.2
« Reply #3 on: 20 May 2010, 18:24:28 »
At the risk of this being seen as a foible of mine, turn the ignition off, disconnect the MAF connector (in the air trunking between air filter and throttle body) and start her up. If she idles better with the MAF disconnected then you need a new MAF. See if that helps. The least it will do is confirm one way or the other if the MAF is playing silly beggars. Also check the air trunking for leaks,specially on the underside. Unmetered air after the MAF can cause your symptoms. HTH :y
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Erzy

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Re: Start-up lumpy idle on 2.2
« Reply #4 on: 20 May 2010, 18:59:02 »
I shall try this in morning as i am currently at work. Will unplugging the MAF cause my eml light to stick on again ? And also if its a faulty Maf should'nt i already have a fault code ? Thanks for the advise :y
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Welung666

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Re: Start-up lumpy idle on 2.2
« Reply #5 on: 20 May 2010, 21:02:33 »
Unplugging the MAF will cause a light, a failed/failing MAF doesn't always bring up the light.
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ronnic

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Re: Start-up lumpy idle on 2.2
« Reply #6 on: 24 May 2010, 15:51:33 »

Hi Erzy

I have exactly the same problem. No warning light and a very lumpy idle at start up with a non responsive throttle, this last for about 10 seconds then seems fine.

I have recently had a new H/G and manifold. Also had new Maf sensor replaced.  Still having the same problems though.

i have a 2.2 cdx estate.

any help would be great.

Ronnic
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Iain

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Re: Start-up lumpy idle on 2.2
« Reply #7 on: 24 May 2010, 21:22:42 »
Hi folks,

Mine exactly the same,from overnight cold start its not too lumpy,slight stutter only.
Go do the school run,park it up. Go back out in it either 1 hour or 4 hours later very lumpy.....
Now when i get it to rev,i get a puff of black smoke....?

I was thinking something to do with the cold start?

Any help would be great,its starting to pee me off ever so slightly

No codes stored either
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Erzy

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Re: Start-up lumpy idle on 2.2
« Reply #8 on: 25 May 2010, 00:19:33 »
OK so there are at least three of us OOFers with this problem then. Any experienced chaps out there had same problem and got it sorted.
  I unplugged the MAF and it seemed alright, tried it with a spare MAF and it seemed slightly worse so i've the original on again, tightened up jubilees on breather hoses etc.... But its still there warmstart, erratic idle, non-responsive throttle , sounds shocking and then after a while it sorts itself out ?  Anyone else think its worse when the car has been sat in the heat ?? :-/
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Iain

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Re: Start-up lumpy idle on 2.2
« Reply #9 on: 25 May 2010, 09:09:44 »
Mine is irratic,it can happen parked in the shade where its cool or can be parked in the heat,still does it either way.

Can some of the experts on here please help! I'm heading to the 'box of matches' stage with this!

 >:( :D
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Iain

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Re: Start-up lumpy idle on 2.2
« Reply #10 on: 25 May 2010, 11:10:31 »
Anyone?





Please! :)
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tunnie

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Re: Start-up lumpy idle on 2.2
« Reply #11 on: 25 May 2010, 11:15:51 »
have either of you unplugged the MAF to see what happens?
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Iain

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Re: Start-up lumpy idle on 2.2
« Reply #12 on: 25 May 2010, 12:30:57 »
Hi Tunnie,i haven't no,but will try it later today.

Someone above has had a new one fitted and its still the same i think

Thanks for the reply  :y
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Ken T

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Re: Start-up lumpy idle on 2.2
« Reply #13 on: 25 May 2010, 14:19:06 »
on the 2litre Omega's the idle control valve used to screw up idling if it was gummed up. i don't supose it could be something to do with the throttle body breathers ?.

Ken
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panderson

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Re: Start-up lumpy idle on 2.2
« Reply #14 on: 25 May 2010, 14:51:12 »
Erzy - at the risk of "jumping on the bandwagon", lets make that 4 OOFers.
For about the last week or so, I'm experiencing exactly the same symptoms as you.
I've had a trawl through previous postings and have discovered a "How To" for the Idle Control valve that Ken T mentioned above. I just haven't got round to doing it yet.
Work commitments are taking all of my time at the moment and, I suppose, the car runs fine after the first ten seconds or so. Will need to attend to it sooner rather than later though.
If you establish another cause before I have a go, could you let us all know. ;)
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