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Home -> Forums -> Electrical -> HELP.! Missfire and Erratic clocks - usual suspects checked

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Author Subject: HELP.! Missfire and Erratic clocks - usual suspects checked
jasonj

Regular

Location: wrexham

Registered: 17 Dec 2007

Posts: 140

Status: Offline
Post #1
I really need help guys, i'm getting really p**sed with this problem. I have searched the symptoms on here and tried everything suggested.
So here goes. A few weeks ago I put my phase 2 6 back on the road after an 18 month spell of being laid up. It ran great for the 1st day but then on the 2nd day it developed a missfire on tickover and up to around 1500 rpm where it would clear. The missfire coincided with the clocks winding round to the 2 oclock position and back to rest. After reading about earthing problems causing this i cleaned up the earth points on the gearbox and on the chassis under the battery tray, Oh yeah the better was brand new. The missfire has been getting gradually worse and tonight it was running on 3 and didnt clear at all. I have added additional earths. 1 from the engine to chassis and 1 from battery earth clamp to chassis. No difference. I have tried an ECU reset twice. The battery light lights up with the ignition and goes out on start up. Ive checked all the fuses under in the engine bay, taken every sensor plug off to inspect and coil connector plugs.
Any suggestions guys. its realy got me down now. Thumbs down
Posted 30th Jan 2013 at 21:43
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bigbadbowen

Seasoned Pro

Location: Winchester

Registered: 21 Nov 2003

Posts: 13,753

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Post #2
Sounds coil related to me bud ? Unplug the injectors one at a time till you un plug one that makes no difference to running on 3 cylinders. Then change the coil Yes
Posted 30th Jan 2013 at 21:54
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jasonj

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Location: wrexham

Registered: 17 Dec 2007

Posts: 140

Status: Offline
Post #3
Would a dodgy coil effect the clocks though.? When the missire starts the clock go beserk.
Posted 30th Jan 2013 at 21:57
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bigbadbowen

Seasoned Pro

Location: Winchester

Registered: 21 Nov 2003

Posts: 13,753

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Post #4
Checked both earths on the gear box ? Crazy clocks is usually battery related ? But I'm not sure if recounted works off a coil signal ?
Posted 30th Jan 2013 at 22:03
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jasonj

Regular

Location: wrexham

Registered: 17 Dec 2007

Posts: 140

Status: Offline
Post #5
Yep checked both earths and added 2 more for good measure.
Posted 30th Jan 2013 at 22:07
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bigbadbowen

Seasoned Pro

Location: Winchester

Registered: 21 Nov 2003

Posts: 13,753

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Post #6
Then back to basics bud ? Spark, fuel, air ? Find the effected cylinder and check you have a spark and fuel ?
Posted 30th Jan 2013 at 22:14
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jasonj

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Location: wrexham

Registered: 17 Dec 2007

Posts: 140

Status: Offline
Post #7
Yeah.. sods law though it will be running on 4 again in the morning. Cheers for the help though.
Posted 30th Jan 2013 at 22:25
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Chris28190

Senior User

Location: .

Registered: 15 Apr 2012

Posts: 736

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Post #8
I had similar problems back around April time and was running on 3 and all it turned out to be was 1x lose spark plug and others covered in s**t. Since I changed them all it ran sweet. Could be worth checking since it's a quick and cheap thing to do.

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Cherry Rallye '99 - Sold
Posted 30th Jan 2013 at 22:41
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stan_306gti6 Forum Admin

Location: Kent

Registered: 18 Jan 2004

Posts: 21,768

Status: Offline
Post #9
Check the battery terminals for tightness and cleanliness. Thumbs up

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Posted 30th Jan 2013 at 22:41
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jeffers Forum Admin

Location: Leeds

Registered: 14 Dec 2003

Posts: 3,702

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Post #10
stan_306gti6 wrote:
Check the battery terminals for tightness and cleanliness. Thumbs up

This! ^^ I've had this very issue and a new earth clamp cured it!! Thumbs up

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Posted 30th Jan 2013 at 22:46
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jasonj

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Location: wrexham

Registered: 17 Dec 2007

Posts: 140

Status: Offline
Post #11
I'll give it a try. The earth clamp on there now is clean and tight, but i'm willing to try anything. I may as well change the positive while im at it. I dont trust that rubbish screw on job.
Im also starting to doubt if the new battery is duff. Will get that checked out tomorrow.
Posted 30th Jan 2013 at 22:54
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jasonj

Regular

Location: wrexham

Registered: 17 Dec 2007

Posts: 140

Status: Offline
Post #12
Looks like number 3 coil was down. replacement will be here this afternoon so hopfefully it sorts it. Bizarrely though since running on 3 cylinders the clocks havn't been jumping around so maybe the coil breaking down was creating other electrical gremlins. confused.com
Posted 31st Jan 2013 at 09:44
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stan_306gti6 Forum Admin

Location: Kent

Registered: 18 Jan 2004

Posts: 21,768

Status: Offline
Post #13
Any news then? Dunno

________________________________________

"Supercharged - 454.1bhp/317.5lb/ft"
Peugeot 306 GTi-6
2000 (X), Moonstone Love
Posted 31st Jan 2013 at 16:05
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jasonj

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Location: wrexham

Registered: 17 Dec 2007

Posts: 140

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Post #14
My car is in the fitting centre at work.. Coil pack has arrived but they havn't had chance to fit it yet. I shall report back after my journey home from work.
Posted 31st Jan 2013 at 16:08
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jasonj

Regular

Location: wrexham

Registered: 17 Dec 2007

Posts: 140

Status: Offline
Post #15
So a new coil sorted it.. runs on 4 cylinders, no missfire, no dancing clocks. All good. All i can think is that the dodgy coil was creating electrical interference which was causing the clock issues. Who'd have thunk it.
Posted 31st Jan 2013 at 20:10
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stan_306gti6 Forum Admin

Location: Kent

Registered: 18 Jan 2004

Posts: 21,768

Status: Offline
Post #16
Glad it's resolved mate. Thumbs up

________________________________________

"Supercharged - 454.1bhp/317.5lb/ft"
Peugeot 306 GTi-6
2000 (X), Moonstone Love
Posted 31st Jan 2013 at 21:46
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bigbadbowen

Seasoned Pro

Location: Winchester

Registered: 21 Nov 2003

Posts: 13,753

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Post #17
So I was right then coil was shagged Big grin

Glad I have loads spare Yes
Posted 31st Jan 2013 at 21:50
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jasonj

Regular

Location: wrexham

Registered: 17 Dec 2007

Posts: 140

Status: Offline
Post #18
Yeah.. you called it dude. Nice one.
Posted 31st Jan 2013 at 22:04
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