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Old 10-11-2011, 10:22 PM   #1
POELWYK
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Default Help with car sounding like its running on 5 cylnders

ok guys i need help im outa ideas....


this is what happend

i drove the car one day all good i put $20 worth of Ron 98
next day started it and it sounded like its on 5 cyl

of changed spark plug leads
Spark plugs
iv checked for spark on all cyl ....
Going to change coilpack with spear 100% knowing that it works

im outa ideas :( could bad batch of petch do this or is there something i could check for like stuffed rocker or something....

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Old 10-11-2011, 10:29 PM   #2
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Default Re: Help with car sounding like its running on 5 cylnders

Injectors or Coil Pack would be my guess....
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Old 10-11-2011, 10:33 PM   #3
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Default Re: Help with car sounding like its running on 5 cylnders

i dont think its injecters its to of a sudden thing... im just seeing what other things it could be / look at i gota fix this as i need it... and my BA is going for a tune )
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Old 10-11-2011, 10:41 PM   #4
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Question Re: Help with car sounding like its running on 5 cylnders

Bad batch of fuel?

Hope you get it sorted soon.

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Old 10-11-2011, 11:16 PM   #5
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Default Re: Help with car sounding like its running on 5 cylnders

Where did the fuel come from?
C
ould be the fuel filter/pump? Bang the tank while the car's running, see if the noise from the pump changes...
Vacuum leak?
H
ow clean's the front of the motor, the crank angle sensor could be fouled?
D
oes it rev cleanly?
Fuel smoke?
Lifters w
ill make a ticking/rattling sound if stuffed.
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Old 10-11-2011, 11:25 PM   #6
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Default Re: Help with car sounding like its running on 5 cylnders

i got the petch from my normal place 7/11 old Mobal servo (good turn over)

No vacume leaks

the bay gets cleaned every cupple of weeks to watch for leats and so on

pump in tank i donno iits a bit hard to know as the car is Loud lol

there was a ticking sound comeing from the car when it gets hot b4 this happend

ill have to try and see i might go to another servo and get some more fuel and see if it helps or not

the car isent reving well down low once it gets up speed it feels ok ish not right but better
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Old 10-11-2011, 11:30 PM   #7
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Default Re: Help with car sounding like its running on 5 cylnders

Sounds like bad fuel or weak spark......
L
ow fuel pressure is normally worse under acceleration.
D
oes it have reasonable power? Could be a blocked cat but that's not usually a sudden thing.

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Old 10-11-2011, 11:36 PM   #8
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Default Re: Help with car sounding like its running on 5 cylnders

its got power its worked lol....


na it feels like its not running on all cyl

i might put a few leters of clean fuel in her and change the coil pack and see what happens what do u guys think
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Old 10-11-2011, 11:45 PM   #9
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Default Re: Help with car sounding like its running on 5 cylnders

Sounds like a good starting point, yeah. Don't think from what you're saying that it'll be anything very major
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Old 10-11-2011, 11:52 PM   #10
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Default Re: Help with car sounding like its running on 5 cylnders

yeah ill give that a try if all fails ill post back my findings with a vid if i need to
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Old 11-11-2011, 12:47 AM   #11
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Default Re: Help with car sounding like its running on 5 cylnders

coil pack wet? i find if my coil gets wet it runs like a pig. any of your plugs/leads died?
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Old 11-11-2011, 01:32 AM   #12
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Default Re: Help with car sounding like its running on 5 cylnders

you beat me too it Day-mow , was just going to say , have you washed the engine recently? been through any floods lately?
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Old 11-11-2011, 02:21 AM   #13
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Default Re: Help with car sounding like its running on 5 cylnders

Disconnect the injector electrical connector for each cylinder one at a time.

If it makes no difference to how it runs then that cylinder is where your problem is.

It won't tell you WHAT is wrong but it has to be either fuel or spark.
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Old 11-11-2011, 12:47 PM   #14
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Default Re: Help with car sounding like its running on 5 cylnders

Ba the bay hasn't had a wash in weeks I put new spark plugs and leads on it yesterday soo I'll give all that a try Sunday when I'm home next
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Old 11-11-2011, 04:44 PM   #15
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Default Re: Help with car sounding like its running on 5 cylnders

Quote:
Originally Posted by POELWYK
Ba the bay hasn't had a wash in weeks I put new spark plugs and leads on it yesterday soo I'll give all that a try Sunday when I'm home next
Still got you old spark plugs and leads? Put them back in and see how it runs. (I would still have them lying around, my wife would have chucked them out)

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Old 11-11-2011, 10:18 PM   #16
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Default Re: Help with car sounding like its running on 5 cylnders

Cracked spark plug ? Does it do it at idle ? If so remove 1 lead at a time until you find which cylinder .

Could be Coil pack though if its constant .

Ticking when hot , IS it low on Oil ? maybe the oil is in need of a chnge
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Old 12-11-2011, 12:57 PM   #17
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Default Re: Help with car sounding like its running on 5 cylnders

na old leads where stuffed so thay got the bin (thay broke when removeing)

na its not low on oil it has just devalaped a tick when its hot i donno yet ....

this is how it sounded when working right

http://youtu.be/FN_tJfHdHR8

and

http://youtu.be/bDQN8T1Px90

and

http://youtu.be/o_znZjgh6aE
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Old 14-11-2011, 08:22 PM   #18
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Default Re: Help with car sounding like its running on 5 cylnders

ok guys i pulled the injecters off and found number 6 did not make any dif so i investergated more and found number 6 on the coil was giveing odd a lazy spark when it felt like it or not at all ....

Changed the coil pack and the thing fired 1st kick

thanks for the help guys
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Old 14-11-2011, 10:16 PM   #19
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Default Re: Help with car sounding like its running on 5 cylnders

Can you try to describe what "sounding like its running on 5 cylinders" sounds like? I noticed today that my AUIII I6 engine note seems to be more rumbly and throaty, actually sounds pretty cool, but I know it's not normal. :(

I've only ever had random split second misfires due to bad leads, never a cylinder that is totally dead, so I'm not sure what it sounds like... guess I'll be trying the sparks and/or injector plugs tomorrow to see what happens.
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Old 14-11-2011, 10:19 PM   #20
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Default Re: Help with car sounding like its running on 5 cylnders

ill upload a vid my au dose not sound like a nromal au and do u get shuttering/ Loss of power??
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Old 14-11-2011, 10:42 PM   #21
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Default Re: Help with car sounding like its running on 5 cylnders

heres a vid of it when it was sick

http://youtu.be/bPg6oVknSI8
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Old 15-11-2011, 12:00 PM   #22
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Default Re: Help with car sounding like its running on 5 cylnders

Cheers for that. Hmm, mine is sort of like that, it is chugging a little, but not quite so bad. Once I'm in the car and driving I don't notice any difference, apart from the trip meter showing excessive consumption (got past 17L/100km the other day)

In the past 6 months I've replaced leads, sparks, coil pack, O2 sensor... so I'm thinking by now it's probably something mechanical. :( Or maybe an injector...

When pulling the injector connectors do you stop the engine between each one, or can you do it on the fly?
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Old 16-11-2011, 05:53 PM   #23
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Default Re: Help with car sounding like its running on 5 cylnders

do it on the fly leave it running
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Old 16-11-2011, 05:58 PM   #24
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Default Re: Help with car sounding like its running on 5 cylnders

Ok, next silly question. How are you supposed to disconnect the individual injectors? It's impossible to pull them all at the injector itself for most of them (fuel rail, air tubing etc in the way) so is there a way to disconnect them individually at the other end of the cable, or do they all feed into a single connector?

Found another coolant leak. *sigh*
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