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Author Topic: Uneven Tickover - backfiring and 'popping'  (Read 851 times)

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Shep

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Uneven Tickover - backfiring and 'popping'
« on: 03 April 2009, 10:51:38 »
Any help would be much appreciated! - I have recently bought a 1997 Omega 2.5i V6 with LPG.
The tickover seems very lumpy and when accelerating from a stand still the exhaust 'pops!' and backfires before the car finally decides to go!
Also the car seems generally sluggish with disappointing acceleration - mpg is shown as around 17mpg.
The car came with receipts showing it has had a full service, new plugs and new HT leads in the last 2000 miles.

Thanks!
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matt bolton

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Re: Uneven Tickover - backfiring and 'popping'
« Reply #1 on: 03 April 2009, 11:25:05 »
Has somebody sold my car while I wasn't looking LOL  ;D  I have same problem and am still trying to figure it out
Good luck as I am rapidly losing my hair trying to sort this out but I don't know where to start occasional eml but all in all just a. It sluggish and occasional misfires and similar symptoms to yourself
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feeutfo

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Re: Uneven Tickover - backfiring and 'popping'
« Reply #2 on: 03 April 2009, 11:31:13 »
got to start with the paper clip test i reckon. Follow the link post the fault codes you find.
http://www.omegaowners.com/forum/YaBB.pl?num=1189022687
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Shep

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Re: Uneven Tickover - backfiring and 'popping'
« Reply #3 on: 04 April 2009, 09:14:45 »
I've just done the paper-clip test - It's showing
12
19
12
Anyone help with what that means? :-/
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Cameron

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Re: Uneven Tickover - backfiring and 'popping'
« Reply #4 on: 04 April 2009, 14:02:31 »
Well 12 are just start & stop of paperclip test.

19 is crank sensor but that wouldn't normally cause misfiring, it would simply stop running.
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RobG

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Re: Uneven Tickover - backfiring and 'popping'
« Reply #5 on: 04 April 2009, 16:23:14 »
Also have you checked the plugwells for oil :question
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Dave-C

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Re: Uneven Tickover - backfiring and 'popping'
« Reply #6 on: 04 April 2009, 16:25:17 »
Air leak on intake !
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LFF64

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Re: Uneven Tickover - backfiring and 'popping'
« Reply #7 on: 04 April 2009, 18:59:15 »
I had similar problems when my EGR valve came apart may be worth checking that  :y
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