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 Posted: Sun Mar 02, 2014 10:57 am |
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Joined: Feb 07, 2010
Posts: 729
Trade Rating: 0
Location: Norfolk
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Hi all,
I was looking for a little help regarding my o2 sensors, I have a suspicion the car is over fuelling so I have just checked my o2 sensors.
O2 Volts Bank 1 sensor 1 was displaying a waveform variation in voltage.
O2 Volts Bank 1 sensor 2 was a solid line with no variation (although testing again shows a waveform)
Am I doing this correctly leading me to suspect sensor 2 is not working?
I haven't got any eml lights on!!!
Thanks
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Last edited by mattymj on Sun Mar 02, 2014 12:00 pm; edited 1 time in total
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Posted: Sun Mar 02, 2014 11:27 am |
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Joined: Feb 07, 2010
Posts: 729
Trade Rating: 0
Location: Norfolk
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Fuel trim on tick over
Fuel trim bank 1 long term= -5.47%
Fuel trim bank 1 short term = -2.34% and 0%
Can anyone explain if there is a problem here?
Thanks
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Posted: Sun Mar 02, 2014 5:11 pm |
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Joined: Feb 07, 2010
Posts: 729
Trade Rating: 0
Location: Norfolk
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P.S does the 180 have a mass air flow?
And I have just read an interesting article regarding the 180 airbox:-
We have tested the VFC263 Viper Cold Air Induction System on a demo-car, and found the original airbox to be more effective (!) with the addition of the PP1585 Panel Filter.
It has a rather complicated system, obviously well engineered by the people at Peugeot, with regulated Twin Air Intakes before the Airbox itself.
A vacuum actuator on the secondary intake pipe (operated by a solenoid and vacuum booster) opens the valve when required and lets more air in,.
The principle behind this is an old one: a slightly Restrictive Airflow can produce better torque with a certain plenum chamber set-up. However, as the rpm is increased, so is the Air-requirement. To lesson the increase in negative pressure and balance this, the computer regulates the second intake to optimise the airflow/pressure before the filter. Very clever though: The pressure is sensed from the actual Plenum Chamber itself, to lesson the effect of the Air Cleaner Element status.
When I went from induction kit back to standard airbox I couldn't find my vacuum pipes so I have left them off, would this reduce performance by stopping the valve from opening?
Thanks
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Posted: Mon Mar 03, 2014 2:47 am |
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Joined: Feb 07, 2010
Posts: 729
Trade Rating: 0
Location: Norfolk
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No help from any knowledgeable people?
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Posted: Mon Mar 03, 2014 3:17 am |
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Joined: Feb 07, 2010
Posts: 1493
Trade Rating: +8
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No idea about the top half of the thread but on induction kits,
From what I have read above, yes in theory it probably should decrease your performance. In reality, it probably won't make much of a difference.
It is a complicated setup, is it better than an induction system? well for me on my car no. My car definitely feels like it revs alot free-er with my Simota setup, and I'm changing the element to a Green filter which is what they use on the WRC scene. I see the complicated parts on the stock system as a delay in getting that all important cold air in. How can it be better than running a system that is still enclosed but more direct, and demands less management with technically a better element and better cold air feed?
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Posted: Mon Mar 03, 2014 4:38 am |
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Joined: Feb 07, 2010
Posts: 729
Trade Rating: 0
Location: Norfolk
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Yes I see all of that. I guess the important part is getting the cold air in. I have ordered some new vacuum pipes so I shall see how it goes from there
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Posted: Mon Mar 03, 2014 11:05 am |
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Joined: Aug 04, 2011
Posts: 1343
Trade Rating: 0
Location: Swindon
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Regards O2 sensors there should be a rapidly switching voltage. However not all O2 sensor failures will give an EML. Also note that not all cars are designed to use the O2 feedback loop at idle nor on foot to the floor full throttle.
Also double check for exhaust leaks, partial misfire, defective temp sensor or leaking injectors. All of these can cause the apparent effect of over fuelling and if only slight again won't give an EML.
Personally my experience (including rolling road testing) shows that cone filters unless installed with lots of thought rarely improve torque across the range. The "expected" extra power and extra bbwwarrrppp con the brain into thinking you have improved things when you haven't.
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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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