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 Posted: Mon Feb 11, 2013 2:44 pm |
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Joined: Jan 10, 2013
Posts: 25
Trade Rating: 0
Location: Nothern Ireland
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right i know loads of these problems are on this but would like to know for sure, my car has been excellent for years untill ive left it sitting for few weeks now and it has a blow out in down pipe. its lost power and running off cylinders shaky exhaust and engine light on. ive replaced the plugs from champions to ngk which i know are crap for 206 lol but ive also replaced the coil pack to and i still have same problem im gona try boshe plugs now but do you think it could be the down pipe cat blow out ? thanks fpr helping
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Posted: Mon Feb 11, 2013 3:46 pm |
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Joined: Feb 07, 2010
Posts: 898
Trade Rating: +5
Location: Melton Mowbray Leicestershire
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The blow certainly wont be helping matters, i would try and find out what cylinder is misfiring. Also get someone to scan the car with a diagnostics machine to see if they can point you in the right direction.
What engine do you have?
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Posted: Mon Feb 11, 2013 4:06 pm |
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Joined: Jan 10, 2013
Posts: 25
Trade Rating: 0
Location: Nothern Ireland
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cheers thats sounds good.. its a 1.1 mate
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Posted: Mon Feb 11, 2013 4:16 pm |
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Joined: Feb 07, 2010
Posts: 898
Trade Rating: +5
Location: Melton Mowbray Leicestershire
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Remove the exhaust manifold heat shield with the engine cold, put water on the manifold on the seperate branches, start the engine and watch to see from which cylinder the water isnt evapourated off as the others.
Then try swapping the plug from that cylinder to another then the same with a injector, if the misfire follows the part you swap, it points to a faulty component.
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Posted: Mon Feb 11, 2013 4:26 pm |
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Joined: Jan 10, 2013
Posts: 25
Trade Rating: 0
Location: Nothern Ireland
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no worries will give that a go! its doing my head in, do you reckon should def change to bosh plugs before i do anything tho?
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Posted: Mon Feb 11, 2013 4:28 pm |
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Joined: Feb 07, 2010
Posts: 898
Trade Rating: +5
Location: Melton Mowbray Leicestershire
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I would try and see if you can find the misfire first, i had ngk plugs in mine for 2 years and never had a problem.
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Posted: Mon Feb 11, 2013 4:33 pm |
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Joined: Jan 10, 2013
Posts: 25
Trade Rating: 0
Location: Nothern Ireland
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ah right no probs thats good to know then cheers for helping mate
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Posted: Tue Feb 12, 2013 12:39 pm |
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Joined: Aug 04, 2011
Posts: 1343
Trade Rating: 0
Location: Swindon
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If you have an exhaust blow before the lambda sensor the lambda sensor will see the excess O2 and think the car is running lean and the ECU will throw buckets of fuel at it to compensate.
That is the problem with modern ECU managed engines. If there is a fault the ECU "sees" it, usually thinks it is something else, the feedback circuit kicks in and compensates for a fault that is actually something different.
Fix the exhaust leak first. Do not do anything else until then.
You may also find that the excess fuel has destroyed your lambda sensor and you may need to replce that. Lambda sensors despite their ability to withstand heat don't like lots of fuel.
So, fix exhaust, fix lambda sensor (if needed) and engine management light and go from there.
If you really think the big manufacturers make poor plugs I say think again. I have read the threads and am not disputing what people find but I have only ever had one bad plug in my 35 years as a mechanic and that was a "Golden Lodge" plug that are special ones for Alfa boxers. I have never had any other big brand plug let me down.
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| Morris 1000, Austin 1100, Escort Mk2, Fiat Mirafiori, Alfa 33, Alfa GT Junior, Alfasud, Alfetta GTV (2x), Alfa 164 3.0 V6, Alfa 164 2.0, Alfa 75 V6, Alfa 156 2.4 (diesel remapped 200bhp), Alfa 147 GTA (3.6 295bhp), Alfa 159 (diesel remapped 245bhp 300ft.lbs @ 2500rpm)
Why isn't my daughter an Alfaholic? | |
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Posted: Tue Feb 12, 2013 2:47 pm |
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Joined: Jan 10, 2013
Posts: 25
Trade Rating: 0
Location: Nothern Ireland
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you got it spot on kandlbarret i spoke with another mechanic and he said the exact same thing thatl il need to replace the lamda sensor and change exhaust its only took so much and that its just got worse i noticed its been drinking my fuuel badly so that all makes perfect sence ! thanks for your help
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Posted: Mon Feb 18, 2013 12:52 pm |
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Joined: Jan 10, 2013
Posts: 25
Trade Rating: 0
Location: Nothern Ireland
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just want to ask.. ive now changed the cat down pipe brawn new and sounds alot better but its still off one cylinder so before i replace the lambda sensor tomorrow would it be the manafold one ? thanks
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Posted: Fri Feb 22, 2013 1:31 pm |
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Joined: Aug 04, 2011
Posts: 1343
Trade Rating: 0
Location: Swindon
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If you haven't done so already a fault code reader will tell you which sensor is defective.
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| Morris 1000, Austin 1100, Escort Mk2, Fiat Mirafiori, Alfa 33, Alfa GT Junior, Alfasud, Alfetta GTV (2x), Alfa 164 3.0 V6, Alfa 164 2.0, Alfa 75 V6, Alfa 156 2.4 (diesel remapped 200bhp), Alfa 147 GTA (3.6 295bhp), Alfa 159 (diesel remapped 245bhp 300ft.lbs @ 2500rpm)
Why isn't my daughter an Alfaholic? | |
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Posted: Fri Feb 22, 2013 3:38 pm |
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Joined: Jan 10, 2013
Posts: 25
Trade Rating: 0
Location: Nothern Ireland
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already changed the manifold one mate 100% better worked better for everything cheers !
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