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Re:G13BB Engine runs rough intermittent

  • Owl
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19 Mar 2020 08:25 #220058 by Owl
Hi All, Have been experiencing the engine periodically running rough , feels like its cutting out intermittent but doesnt stall, Then goes away. happens periodically. No check engine light on. Then runs smoothly again.

Happens when the engine is at operating temp, on the hotter side, today i noticed it after going up a hill, the engine felt like it was cutting out then coming back on , then it would run fine for the run home.

Anyone experienced this before, and what could it be? Could it be a bit water in fuel? Coil packs? Just dont know where to start with this one.


Thanks Owl.

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  • Owl
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19 Mar 2020 09:05 #220062 by Owl
Replied by Owl on topic G13BB Engine runs rough intermittent
Thinking cam angle sensor as it has that surging feeling, feels like engine surges forward then stops surging, bit of a stutter, that's probably a more accurate way to describe it. just had head gasket replaced on this one.

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  • barnsley john
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19 Mar 2020 18:48 #220073 by barnsley john
Replied by barnsley john on topic G13BB Engine runs rough intermittent
Is it crap petrol you have in
Try and fill tank up with high octane fuel just a idea

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  • Owl
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20 Mar 2020 05:03 #220077 by Owl
Replied by Owl on topic G13BB Engine runs rough intermittent
BJ I only use 98 octane, but we have had a month of rains across the eastern states makes a change to fires. Might be a bit water in fuel, but I feel its losing power noticeably up hills, its different to what it was.

Also I think it runs too hot, and it seems the surge and the cutting out symptoms appear on the hot side, ie, after going up a hill.

Is that fan on the front of car supposed to come on and off during driving? I never hear it come on. I put 12v across terminals months ago to see if it works and the fan does work. Seems to work if air-cond is put on? Might have a dickie water temp sensor? Looks like its another trial and error scenario.

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  • Lambert
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20 Mar 2020 05:09 #220079 by Lambert
It might be the catalytic converter in its way out causing a blockage, possibly?

Temeraire (2018 quasar grey automatic)
One of the last 200ish of the gen3s, probably.
ADOS Attention Deficit Ooooh Shiny!

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  • Owl
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20 Mar 2020 05:24 #220080 by Owl
Replied by Owl on topic G13BB Engine runs rough intermittent
Yes, didnt think of that, consistent with the symptoms and engine running hot. Ill get it checked out ASAP. Thanks Lambert.

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