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 Posted: Sat Jul 07, 2012 5:00 am |
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Joined: Jul 07, 2012
Posts: 18
Trade Rating: 0
Location: on the drive
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The car is a 2005 1.4i (z06) 206 petrol.
It has been brilliant, except a bit too thirsty on petrol, ever since we've owned it from new.
Yesterday morning however it broke down. There has always been a very very slight mis fire occasionaly on idle. So slight and nothing else wrong that we just put it down to a quirk.
Anyhow now it is missing badly on idle and the engine is visibly juddering on it's mountings. I put new bosch plugs is last night and it is exactly the same.
Today I checked the coil bar and all is firing very nicely. All gaps factory set to 0.9mm.
The following codes were on there to start:
P0118
P0141
P1523
I disconnected all wiring plugs and checked and reconnected. I then cleared the codes and all was well but the misfire continued.
So i took it to the end of the estate and back and it runs really really bad, barely any power and stalls when slowing/braking.
Put the reader back on and came up with the following.
P0123 twice.
I then cleared the codes again and the engine management light is off.
Took it for a drive and exactly the same with a smidge of backfiring.
There are no more codes on the ecu it is clear and the engine management light is off.
I've been all over the wiring loom in the engine bay and around the fuse box but nothing found.
Any ideas?
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Posted: Sat Jul 07, 2012 7:20 am |
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Joined: Jul 07, 2012
Posts: 18
Trade Rating: 0
Location: on the drive
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I forgot to mention, when i took the original spark plugs out the first three from the timing belt end were a perfect colour. The one next to the flywheel was a a dull sooty black.
I was thinking injector maybe? If so can they be cleaned manually by me and re used or are they just a replacement item?
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Posted: Sat Jul 07, 2012 12:36 pm |
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Joined: Feb 10, 2012
Posts: 14
Trade Rating: 0
Location: Swansea, South Wales
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I had a similar problem, changed the injectors, coil pack and eventually had to change all 4 injectors, try adding a little injector cleaner to your petrol let it run for a little bit see if that helps it helped with mine for about 2 hours ? Before going again, so if this doesn't work best bet is probably changing them but i have been told to replace injectors in pairs?
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| 1.4 8v, Slowly Getting There | |
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Posted: Sun Jul 08, 2012 5:49 am |
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Joined: Jul 07, 2012
Posts: 18
Trade Rating: 0
Location: on the drive
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Bit of an update. I had the injectors out and gave them a blast with carb cleaner. I cleaned all over the inlet manifold area. I also stripped and re cleaned the IVC unit (as per the picture thread on here).
Everything back together and it idles much much better and revs almost spot on on. It still drives like a dog though with mis fire and the odd fart out of the exhaust.
There does now sound like there is an air leak around the inlet manifold. I've been all over the inlet system with wd40 and nothing found so i guess it's just a noise i've not paid attention to before.
When i scan now the only fault code is
02 front bank sensor no reading.
I delete this and it takes ages to come back.
If my engine at standstill is idling and revving fine but massively underpowered when being driven would this point to the lambda in the manifold?
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Posted: Sun Jul 08, 2012 6:42 am |
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Joined: Aug 04, 2011
Posts: 1343
Trade Rating: 0
Location: Swindon
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Can you take "live readings" from the sensors with the car running or being driven.
If you can the lambda sensor should be switching between about 0.25 and 0.75V.
However, if you have fouled injectors then carb cleaner externally is unlikely to do much good; you need them removed, stripped and professionally cleaned.
It could be possible that you have a poor connection on the lambda sensor plug or cable damage. Have a close look and trace the cable.
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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 Jul 10, 2012 12:01 pm |
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Joined: Jul 07, 2012
Posts: 18
Trade Rating: 0
Location: on the drive
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I bought a new coil pack today as a start of the process of elimination and it is driving again.
Only now on idle it flutters between 620 and 850 revs.
Also it drops the revs slower than it did before when driving. Mostly noticeable when dropping from 2000 revs down.
Any ideas?
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