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 Posted: Sun May 05, 2013 12:21 pm |
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Joined: Feb 07, 2010
Posts: 4117
Trade Rating: +25
Location: No Man's Land
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Any idea on what could be causing this..?
It's started yesterday out of the blue. Turn the key slowly as I do down through the positions and the car carried on running for a few seconds.
All help would be great.
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Posted: Sun May 05, 2013 12:48 pm |
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Joined: Apr 18, 2011
Posts: 327
Trade Rating: +3
Location: United Kingdom
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Ecu? knock sensor?
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| 1.6 Xsi - Work in Progress!
"If it has wheels or a skirt, it's gonna give you problems." | |
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Posted: Sun May 05, 2013 3:14 pm |
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Joined: Feb 10, 2010
Posts: 4266
Trade Rating: +4
Location: Palestine
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the ignition is going faulty i believe
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Posted: Sun May 05, 2013 3:27 pm |
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Joined: Feb 23, 2011
Posts: 1211
Trade Rating: +1
Location: sarcasm-in-shedloads
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Overrun could possibly be an over-hot engine (check your oil), poor quality fuel, or dirty spark plugs.
Pinking is normally hesitation or delay in fuelling (bad timing, dirt in tank/fuel line or incorrect fuel mixture/quality) rather than overrun.
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Posted: Sun May 05, 2013 3:40 pm |
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Joined: Feb 07, 2010
Posts: 4117
Trade Rating: +25
Location: No Man's Land
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What would you class as poor quality fuel Ant..? I'm running the 180 on super unleaded from Tesco's but hearing a lot of mixed opinions about fuel from supermarkets. I've got no where around here that is a fuel station like BP or Shell etc so having to use the super markets.
Spark plugs were changed 2 weeks ago when I did a full service.
The only thing is it's doing it even when the engines cold, like if I move the car on my driveway etc.
The engine management light is on as well as off friday so don't know if thats related to it.
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Posted: Sun May 05, 2013 3:50 pm |
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Joined: Feb 23, 2011
Posts: 1211
Trade Rating: +1
Location: sarcasm-in-shedloads
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Supermarket SUL 97-RON should be fine. I have used Tesco SUL in my twincharger with no problems.
If it's overrunning all the time then it could be a timing issue (if it's running lean) or oxygen sensor issue (decat?). If there is a problem with the exhaust then that might cause overrun too, if the engine's igniting burnt fuel.
It could also be an injector problem
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Posted: Sun May 05, 2013 3:58 pm |
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Joined: Feb 07, 2010
Posts: 4117
Trade Rating: +25
Location: No Man's Land
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Could the fact I've dropped redex, be the cause of the problem..?
Put a shot of it in when I did the service, but at the same time I did brim the car with Tescos SUL.
Cars running a cat, so may well be that the it's running lean, no one local (within a 30 mile radius) of me has peugeot planet so can't plug it in.
Cars currently on the red light, so thinking I'm just going to run it into completely empty and then fill back up with super unleaded, see if that sorts the problem.
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Posted: Sun May 05, 2013 4:02 pm |
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Joined: Feb 07, 2010
Posts: 2949
Trade Rating: +6
Location: Athens, Greece
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| Barking wrote: |
Overrun could possibly be an over-hot engine (check your oil), poor quality fuel, or dirty spark plugs.
Pinking is normally hesitation or delay in fuelling (bad timing, dirt in tank/fuel line or incorrect fuel mixture/quality) rather than overrun. |
Excatly
Scan away..
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| 1.4i, 2001, 3-door, China Blue
Repair safely - Drive safely | |
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Posted: Sun May 05, 2013 4:05 pm |
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Joined: Aug 04, 2011
Posts: 1343
Trade Rating: 0
Location: Swindon
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First task is to get the codes read.
Engine running on could be running very lean (air leak?) and that could also be the cause of the engine light being on.
I would also go for a good drive at a steady speed on a dual carriageway and then remove the plugs and check the colour. Haynes manual gives a good guide on what colour they should be.
When you serviced the car and changed the plugs what code are the replacements and did you check the gap? It might be worth putting the old plugs back in and seeing if the problem disappears.
Go here for some guides on what a plug colour is saying about engine running. Ignore what it says about lead as lead was removed from fuel many years ago.
www.ngksparkplugs.com/...aqread.asp
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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: Sun May 05, 2013 4:16 pm |
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Joined: Feb 07, 2010
Posts: 4117
Trade Rating: +25
Location: No Man's Land
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Well the cars running a Typhoon induction kit, has been for about 6 weeks. This fault appeared during the school run on friday afternoon and the overrun/pinking appeared yesterday morning when I started the car up to move so I could get another car out from in front of it.
When I serviced the car, 2 weeks ago, I replaced the spark plugs with Bosch Super 4 plugs, which are few members on here are using. Same plugs used in the GTi and XSi. Gapping was checked at 0.9mm prior to fitting.
I'll give the car a run tomorrow morning and see what the plugs are showing after that, will try the old plugs as well.
I've got around this morning and check all the pipework such as the silicone hosing I've fitted when removing all the standard setup, as well as the typhoon join at the throttle body, secondary air pump piping, cam cover piping and the VVT pipework. All are secure and clipped in.
Would have thought though, if the spark plugs were at fault, the problem would have appeared alot sooner than it has..?
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Posted: Sun May 05, 2013 5:01 pm |
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Joined: Aug 04, 2011
Posts: 1343
Trade Rating: 0
Location: Swindon
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I am not certain that it is the plugs but checking plug colours will give you a clue about running condition and if there is variation between cylinders.
It could be one injector leaking causing the lambda sensor to "see" excess fuel. The signal from the lambda would then tell the ECU to lean the mixture. The now lean mixture on the cylinders that were running normally could then cause the pinking. This is just one variation of several options. I would have a look at plugs just as an aid to diagnostic but perhaps refit the old ones and see what happens.
Regards the time it has token to occur after changing the plugs it can take time to get carbon build up on plugs but once there the carbon can then glow and that glowing carbon can ignite the fuel and cause pinking. This is relatively rare with modern engines fuel and oil but can happen.
If these engines are fitted with a knock sensor then it could be that failing. The knock sensor does exactly that; senses knocking (pinking) and retards the ignition until it disappears.
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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: Mon May 06, 2013 2:41 am |
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Joined: May 25, 2011
Posts: 1025
Trade Rating: +1
Location: south coast
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not sure on your fault but i would NOT run it right out of fuel as personly i think this may well cause more problems, due to the fact that you will suck up all the crap that is sitting in the bottom of tank and then proberly block your filters and poss injectors.
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