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Author Topic: Rough tickover.  (Read 904 times)

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ted_one

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Rough tickover.
« on: 09 April 2014, 19:06:59 »
Got a bit of a lumpy idle come on over the last day or two,put the scanner on it and got a new code PO 173,any chance this may be the MAF starting to fail?
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zirk

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Re: Rough tickover.
« Reply #1 on: 10 April 2014, 13:15:36 »
Does it get worse or better if you unplug the Maf?, Could be a start of a miss fire, plugs, diss pack? oil. water in the wells.
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symes

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Re: Rough tickover.
« Reply #2 on: 10 April 2014, 19:18:37 »
Quote from: nitro on 09 April 2014, 19:06:59
Got a bit of a lumpy idle come on over the last day or two,put the scanner on it and got a new code PO 173,any chance this may be the MAF starting to fail?
Fuel trim-Bank 2 malfunction.    fuel pressure regulator/air leak/fuel injector HO2S /egr
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tidla

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Re: Rough tickover.
« Reply #3 on: 10 April 2014, 22:06:00 »
Only takes a small split in any of the four hoses which link up the breather system to create a rough idle.

Recently did the thermostat and found the (purge valve?) pipework split.

Cheaper to check than throwing bits at it.
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Kevin Wood

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Re: Rough tickover.
« Reply #4 on: 10 April 2014, 22:40:04 »
Yep, brake servo pipe chafing on the air con pipe is another favourite. :y

Normally, a MAF problem would raise codes on both banks, as it affects them equally.
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