Phillips_91
Member
Registered: 20th Jan 10
Location: Blackpool. Drives: Sapphire Black Mk4 Astra 1.8
User status: Offline
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Ok so had a misfire on my car for a little while (1.4 sport, corsa b) and put it down to the fact i had a hole in the induction pipe, so replaced that last night, but the misfire is still their (altough alot better, only misses every now and again, but still struggles to start up/idle properly)
Could this be down to the egr valve, and if so, what is better to replace or blank?
Thanks alot
Danny 
[Edited on 25-09-2010 by Phillips_91]
[Edited on 25-09-2010 by Phillips_91]
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Ellis
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Registered: 11th Sep 07
Location: Aberdeenshire
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Has the fault brought the EML on?
IIRC it's like a stepper motor for the ICV on that engine, sounds like it may be that. Although, I couldn't say without actually seeing the symptoms in person.
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Phillips_91
Member
Registered: 20th Jan 10
Location: Blackpool. Drives: Sapphire Black Mk4 Astra 1.8
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another problem now! put 4-2-1 manifold on tonight, blanked off sai and took it all out and now its started blowing fuel injector fuses left right and centre! broke down 4 times tonight and all i did was drive to the pub and back! thanks fuck i carry spare fuses, but ran out so i've now lost electric windows and have no stereo!
Oh and sorry, no not brought eml on :/ really getting annoyed now! 
[Edited on 25-09-2010 by Phillips_91]
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12valver
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Registered: 2nd Oct 07
Location: Luton
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Sounds like damage to the wiring somewhere, could possibly be the fuel pump... But they normally just stop working. Could possibly be the cause of your misfire in the first place. If the pump has started playing up, you obviously will get peaks and lows in fuel pressure, affecting the fuel injecting. Causing rough running, and possibly causing the poor starting... Check the wiring out. Could try disconnecting the pump, putting a new fuse in, switch the ignition on. If it pops its your wiring. If not looks like its relating to the fuel pump.
[Edited on 25-09-2010 by 12valver]
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Phillips_91
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Registered: 20th Jan 10
Location: Blackpool. Drives: Sapphire Black Mk4 Astra 1.8
User status: Offline
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yeah i was thinking fuel pump aswell, dont think i could try the fuel pump one as it only pops the fuse when the car is running, but i cant get the car running without fuel to the engine :/
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Phillips_91
Member
Registered: 20th Jan 10
Location: Blackpool. Drives: Sapphire Black Mk4 Astra 1.8
User status: Offline
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Just found this again, so thought i'd post incase anyone else has similar problems and uses search, still got the problem with the missing, going to try egr valve at next pay day,
But the problem with cutting out was the live wire for the fuel pump,
when i fitted the manifold it raised the exhaust at the back and it melted through the live wire causing it to arc out, blowing the fuses, got it on a ramp at work, pulled the exhaust down and secured the wire, problem sorted 
Anyone got any ideas on the misfiring though?
Will post a video if that will help at all?
Edit: also the eml keeps on coming on randomly every now and again but a short burst of revs takes it off again  can you do the paperclip test even if the light has gone back off?
[Edited on 21-01-2011 by Phillips_91]
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Eddx14xe
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Registered: 12th Jan 10
Location: Hertfordshire
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You can still read codes off it even if eml is off as far as im aware, sounds like egr valve as mine is doing the same but now wont start unless rev it, then it idles rough and eventualy dies.
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Phillips_91
Member
Registered: 20th Jan 10
Location: Blackpool. Drives: Sapphire Black Mk4 Astra 1.8
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quote:
Originally posted by Eddx14xe
You can still read codes off it even if eml is off as far as im aware, sounds like egr valve as mine is doing the same but now wont start unless rev it, then it idles rough and eventualy dies.
Will be trying egr valve
mine also struggles to start without givin it revs, and if i dont hold the revs for say 30-40 secs then it dies, once it's goin though it runs fine just with a terrible idle
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danbo
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Registered: 1st Jul 08
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think i read once the light has to be on for 30 seconds before a code is stored not sure if this is correct though
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AlexW
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Registered: 25th Oct 08
Location: Essex
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Worth trying to flash the codes, Should come up though.
Tip, Push BOTH buttons on the MFD with the ign on, will come up with the codes, hopefully.
Could be EGR, Tried pulling the spark plugs and see what they say?
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Phillips_91
Member
Registered: 20th Jan 10
Location: Blackpool. Drives: Sapphire Black Mk4 Astra 1.8
User status: Offline
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no i've not pulled the spark plugs out, last time i did though they seemed alright
Will try that trick with the mfd  cheers mate
Where can i put the code in to find out what error it is once i've flashed the code?
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Ste M
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Registered: 28th Oct 09
Location: Blackpool
User status: Offline
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http://www.topbuzz.co.uk/info/fault_codes/fault_codes.htm
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Phillips_91
Member
Registered: 20th Jan 10
Location: Blackpool. Drives: Sapphire Black Mk4 Astra 1.8
User status: Offline
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cheers ste
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Phillips_91
Member
Registered: 20th Jan 10
Location: Blackpool. Drives: Sapphire Black Mk4 Astra 1.8
User status: Offline
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well eml was on all day yesterday so flashed the codes using paperclip, it seems my egr is knackered, reckon this could cause the misfire?
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Nickb
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Registered: 10th Sep 09
Location: Chester
User status: Offline
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Try taking the EGR off and giving it a good clean with carb cleaner mate half the time they just get clogged
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Chadicles
Member
Registered: 8th Jun 09
Location: Westbury, Wiltshire
User status: Offline
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Get rid of the EGR crap!
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Phillips_91
Member
Registered: 20th Jan 10
Location: Blackpool. Drives: Sapphire Black Mk4 Astra 1.8
User status: Offline
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quote:
Originally posted by Chadicles
Get rid of the EGR crap!
I need it reletively economical, it's used for deliveries so want to actually make some money 
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