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Old 26-11-2007, 07:02 PM   #1
xr8AU2
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Angry Surging Problems

my ute has surging problems when at idle,but this can also be felt when cruising.
Ive recently put in new 02 sensors
new airflow sensor
new leads and plugs
new ECU
new injectors
and ive now come to the end of the line trying to work out whats causing the problem.
it also feels a little boggy on take off also.
Its runs dual fuel (impco system).

does anyone have any ideas they can throw at me!!!

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Old 26-11-2007, 07:51 PM   #2
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Had a similar problem cleaned Idle Speed Controller and good as gold

Many thanks again to GK
Ray
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Old 27-11-2007, 01:40 PM   #3
OzJavelin
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Quote:
Originally Posted by The_Ghost
Had a similar problem cleaned Idle Speed Controller and good as gold

Many thanks again to GK
Ray
Same here. Unless it's running injected LPG the old "BBQ-burner" system doesn't seem to do any favours for the ISC. Reminds me I probably need to clean mine again. I noticed last night it was hunting at idle a bit ..
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Old 27-11-2007, 04:15 PM   #4
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Does it do it on both fuels?
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Old 27-11-2007, 04:34 PM   #5
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does it a little on both fuels but mainly on petrol
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Old 27-11-2007, 04:42 PM   #6
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I'd still clean ISC anyways.cheep n easy
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Old 27-11-2007, 04:44 PM   #7
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http://www.nulon.com.au/products.php?productId=CARB400
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Old 27-11-2007, 05:18 PM   #8
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cheers guys ill give it a clean and see if it helps
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Old 27-11-2007, 05:30 PM   #9
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Quote:
Originally Posted by The_Ghost
I'd still clean ISC anyways.cheep n easy
:
I'd say either this or a clogged fuel filter.
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Old 27-11-2007, 08:44 PM   #10
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mines doing this too....got a mate isc from his car which worked....cleaned it and changed fuel filter and cleaned injectors...still no good
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Old 29-11-2007, 09:22 PM   #11
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cleaned it up, but still no good.
pulling my hair out with this car!!!
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Old 29-11-2007, 09:51 PM   #12
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Quote:
Originally Posted by xr8AU2
cleaned it up, but still no good.
pulling my hair out with this car!!!
How long since you have changed the fuel filter?
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nah mate, aussie cars are the besterest and funnerest, nothing beats them, specially a poofy wrong wheel drive
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Old 29-11-2007, 10:29 PM   #13
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I would be looking at ignition.Pull out the plugs in order and note each one.If one is blacker than the rest then its probably not firing.Could be as simple as a lead.Have a look ,take a photo and post it up if you want some better feedback.
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Old 29-11-2007, 10:36 PM   #14
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I just had a thought, how many k's has it done? If it is anymore than 80k the coil packs may need to be replaced as that is all they are good for before they start to break down.
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Old 30-11-2007, 09:30 PM   #15
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fuel filter was replaced about 1000k ago.
utes done about 120000 but who knows if these are original,
it seems to be running ok on gas at moment but just lacks alot of power.
running it on fuel is like......its ordinary. rough, flat spotting on take off, splutters like its about to run out of petrol yet its full, lack of power.
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Old 30-11-2007, 10:49 PM   #16
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Quote:
Originally Posted by xr8AU2
fuel filter was replaced about 1000k ago.
utes done about 120000 but who knows if these are original,
it seems to be running ok on gas at moment but just lacks alot of power.
running it on fuel is like......its ordinary. rough, flat spotting on take off, splutters like its about to run out of petrol yet its full, lack of power.
Sounds like it's running too rich to me. No idea how to fix it though, especially since you have replaced everything I would have suggested. Could still be coil packs - lots of fuel in and not enough spark = rich (late) burn, but I would expect this to backfire on LPG. Have you tested fuel pressure? Could be a bung fuel regulator or dodgy fuel pump (which would more than likely result in lean running not rich, but also would have no effect on LPG).
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Old 01-12-2007, 09:59 AM   #17
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it backfires on gas but only when its started,but popps and splutters when accelerator is released and car is starting to slow.but doesnt do it on gas.
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Old 01-12-2007, 10:32 AM   #18
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I would have thought that the popping and spluttering is normal on deceleration. Mine does it anyway.
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Old 01-12-2007, 10:49 AM   #19
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i thought so too but it doesnt do it when running on gas, it just doesnt sound right when on petrol.
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