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 Posted: Sat Nov 22, 2014 2:01 pm |
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Joined: Jan 13, 2013
Posts: 46
Trade Rating: 0
Location: Denmark
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Hi
My 2000 GTI138 failed its MOT with a CO in idle on 1,1% and 1,2% High Idle(2500rpm)
I put my PP2000 on today to see if anything was obvious
My Downstream oxygen sensor is constant at 0mV
But i think that it might be caused the to other odd reads from PP2000
air temperature is ~59C
Coolant temperature is 46C
Both stays at the same level +/- 1
I had the car running idle for 10 min with the bonnet open and outside temp was around 5C
The tempgauge was between 70-90C
Are the sensors dead?
Is air temperature the Temp sensor in the throttlebody?
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| 206 GTi 2.0 2000 Trackday+ Daily
205 GTi 1.9 1987 Project
Citroen C4 Grand Picasso 2.0 VTR+ E6G 2008 Family car
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Old cars
Mazda 3 1.6 16v Diesel 2008 - Peugeot 405 1.9 Diesel 1989 - Peugeot 309 1.4 Kick 1991 - Vw Polo 1.3 HIT 1986 - Mazda 626 1.8 1988 - Peugeot 205 GTI Project car - Ford Escort 1.6 16v 1996 - Peugeot 205 1.4 XR | |
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Posted: Sat Nov 22, 2014 2:13 pm |
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Joined: Feb 07, 2010
Posts: 620
Trade Rating: 0
Location: Malaysia
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if urs are 2000 model then u only have 1 o2 sensor, or u have older type ecu which have 1 sensor... i have this type too 
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Posted: Sun Nov 23, 2014 2:31 am |
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Joined: Jan 13, 2013
Posts: 46
Trade Rating: 0
Location: Denmark
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I have Two O2 sensors, one before the cat and one after, the car is from 10/2000 with RFN engine
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| 206 GTi 2.0 2000 Trackday+ Daily
205 GTi 1.9 1987 Project
Citroen C4 Grand Picasso 2.0 VTR+ E6G 2008 Family car
---------------------------------------
Old cars
Mazda 3 1.6 16v Diesel 2008 - Peugeot 405 1.9 Diesel 1989 - Peugeot 309 1.4 Kick 1991 - Vw Polo 1.3 HIT 1986 - Mazda 626 1.8 1988 - Peugeot 205 GTI Project car - Ford Escort 1.6 16v 1996 - Peugeot 205 1.4 XR | |
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Posted: Sun Nov 23, 2014 5:29 am |
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Joined: Feb 07, 2010
Posts: 3085
Trade Rating: +12
Location: Essex
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If you were sitting at idle for that long there is a good possibility that air temp is getting high from the engine bay heat.... coolant temp sensor is probably no good as it should be nearly double that. I would try that one first
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Posted: Sun Nov 23, 2014 8:32 am |
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Joined: Feb 08, 2010
Posts: 7045
Trade Rating: +5
Location: In the garage
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| heyziq wrote: |
| if urs are 2000 model then u only have 1 o2 sensor, or u have older type ecu which have 1 sensor... i have this type too |
Not as simple as that. RFN coded cars are from 2000 onwards and have two sensors. Earlier RFR cars just has one.
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| 2001 GTi 138, Bilstein Sprint dampers, H&R springs, 21mm Peugeot Sport torsion bars, 22mm rear ARB, Peugeot Sport Group A wishbones, 283mm discs, Goodridge stainless hoses, Maniflow 304 grade 4-2-1 2.5" manifold and system, 200 cell cat, Richard Longman head, 45mm Jenvey throttle bodies, 9.5mm TB spacers, 90mm air horns, Jenvey throttle linkage, Jenvey fuel rail, Aeromotive and Goodridge fuel fittings and braided hose, ITG sausage filter, Radtec custom radiator, Piper Ultimate Road cams, Piper vernier pulleys, Omex 600 ECU. Saxo electric PAS pump, Vibra Technics engine mounts. Samco coolant hoses, TTV steel flywheel, 4.76 final drive ratio, 307 CC 180 ratios. 2019 BMW 530i. 2017 Mercedes C300 convertible. | |
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Posted: Sun Nov 23, 2014 10:46 am |
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Joined: Feb 07, 2010
Posts: 7093
Trade Rating: +11
Location: Suffolk
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Was your lambda open or closed loop when you registered 0mv?
Intake sensor sounds dodgy, what does it register with the car no running? Do you have a gay intake on it though?
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| Team Impossible Possible
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Posted: Mon Nov 24, 2014 6:45 am |
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Joined: Aug 04, 2011
Posts: 1343
Trade Rating: 0
Location: Swindon
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If you can do a live drive test. lambda sensors should be voltage switching rapidyly.
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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 Nov 24, 2014 1:37 pm |
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Joined: Jan 13, 2013
Posts: 46
Trade Rating: 0
Location: Denmark
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| Addaz wrote: |
Was your lambda open or closed loop when you registered 0mv?
Intake sensor sounds dodgy, what does it register with the car no running? Do you have a gay intake on it though? |
I Think it was in open loop hence it didnt registeret anything, where would it show open/closed loop?
What determine if open or closed?
I have tested both o2 censors with a voltmeter, While car running in idle both registers between 0,1 and 0,8 volt
I have a new intake temp sensor on the way, and a new cooling temp sensor
Intake is standard with kn panel
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| 206 GTi 2.0 2000 Trackday+ Daily
205 GTi 1.9 1987 Project
Citroen C4 Grand Picasso 2.0 VTR+ E6G 2008 Family car
---------------------------------------
Old cars
Mazda 3 1.6 16v Diesel 2008 - Peugeot 405 1.9 Diesel 1989 - Peugeot 309 1.4 Kick 1991 - Vw Polo 1.3 HIT 1986 - Mazda 626 1.8 1988 - Peugeot 205 GTI Project car - Ford Escort 1.6 16v 1996 - Peugeot 205 1.4 XR | |
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Posted: Mon Nov 24, 2014 1:39 pm |
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Joined: Jan 13, 2013
Posts: 46
Trade Rating: 0
Location: Denmark
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| kandlbarrett wrote: |
| If you can do a live drive test. lambda sensors should be voltage switching rapidyly. |
Live drive test has to wait a few days as i am fixing my front brakes as well
Could it be that exhaust isnt hot enought when just running idle?
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| 206 GTi 2.0 2000 Trackday+ Daily
205 GTi 1.9 1987 Project
Citroen C4 Grand Picasso 2.0 VTR+ E6G 2008 Family car
---------------------------------------
Old cars
Mazda 3 1.6 16v Diesel 2008 - Peugeot 405 1.9 Diesel 1989 - Peugeot 309 1.4 Kick 1991 - Vw Polo 1.3 HIT 1986 - Mazda 626 1.8 1988 - Peugeot 205 GTI Project car - Ford Escort 1.6 16v 1996 - Peugeot 205 1.4 XR | |
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Posted: Mon Nov 24, 2014 2:30 pm |
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Joined: Jan 13, 2013
Posts: 46
Trade Rating: 0
Location: Denmark
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I got this screendump from yesterday with the o2 sensors reading
downstream sensor states 0mV but in the infobox in the bottom it states that in open loop it should be between 0,1v and 1,0v
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| 206 GTi 2.0 2000 Trackday+ Daily
205 GTi 1.9 1987 Project
Citroen C4 Grand Picasso 2.0 VTR+ E6G 2008 Family car
---------------------------------------
Old cars
Mazda 3 1.6 16v Diesel 2008 - Peugeot 405 1.9 Diesel 1989 - Peugeot 309 1.4 Kick 1991 - Vw Polo 1.3 HIT 1986 - Mazda 626 1.8 1988 - Peugeot 205 GTI Project car - Ford Escort 1.6 16v 1996 - Peugeot 205 1.4 XR | |
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Posted: Tue Dec 09, 2014 10:22 am |
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Joined: Jan 13, 2013
Posts: 46
Trade Rating: 0
Location: Denmark
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Still have an issue with to High CO
I have a Maniflow 4-2-1 exhaust with a 200cell cat
The first o2 sensor is placed in the manifold where Two pipes join, is this right or do i need to move it to a location where gas from all 4 cylinders Will reach?
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| 206 GTi 2.0 2000 Trackday+ Daily
205 GTi 1.9 1987 Project
Citroen C4 Grand Picasso 2.0 VTR+ E6G 2008 Family car
---------------------------------------
Old cars
Mazda 3 1.6 16v Diesel 2008 - Peugeot 405 1.9 Diesel 1989 - Peugeot 309 1.4 Kick 1991 - Vw Polo 1.3 HIT 1986 - Mazda 626 1.8 1988 - Peugeot 205 GTI Project car - Ford Escort 1.6 16v 1996 - Peugeot 205 1.4 XR | |
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Posted: Tue Dec 09, 2014 12:01 pm |
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Joined: Aug 04, 2011
Posts: 1343
Trade Rating: 0
Location: Swindon
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Whilst less than perfect this shouldn't cause a problem. Though it does mean that lambda is only reading two cylinders and the second is reading all 4.
In cars with the pre cat lambda reading two cylinders there is usually a pair of pre cat lambdas each reading two cylinders but, as already said, if the car is running correctly this shouldn't be a problem though it will make diagnosis a little harder.
With your readings (voltmeter suggests lambda is OK but PP say different) I would start to suspect broken wire or poor connection.
Does it give an output on PP at any throttle position? If not but your meter is showing it giving an output then it is almost certainly broken wire or bad connection.
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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 Dec 09, 2014 12:05 pm |
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Joined: Apr 16, 2013
Posts: 676
Trade Rating: +1
Location: Blackburn
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That manifold is beautiful
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| 1999 206 Gt... Gti180 inlet, Gti180 exhaust manifold, Gti180 injectors, Gti-6 throttle body, Custom Adapter pipe to mate the throttle body to intake, Gti180 alternator, Gti-6 ICV, Straight through stainless exhaust system, cat cams (apparently), Avo coilovers, short shift gear stick, stripped out with fixed back bucket seat and harness, flocked dash, momo steering wheel and D2 solid boss, real carbon cold air intake, Gti-6 front calipers and 288mm disks, rear drilled and grooved disks, morette headlights, sp bonnet grill 71,456 miles
2008 Audi A3 2.0 Tdi 170 | |
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Posted: Tue Dec 09, 2014 12:39 pm |
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Joined: Jan 13, 2013
Posts: 46
Trade Rating: 0
Location: Denmark
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| kandlbarrett wrote: |
Whilst less than perfect this shouldn't cause a problem. Though it does mean that lambda is only reading two cylinders and the second is reading all 4.
In cars with the pre cat lambda reading two cylinders there is usually a pair of pre cat lambdas each reading two cylinders but, as already said, if the car is running correctly this shouldn't be a problem though it will make diagnosis a little harder.
With your readings (voltmeter suggests lambda is OK but PP say different) I would start to suspect broken wire or poor connection.
Does it give an output on PP at any throttle position? If not but your meter is showing it giving an output then it is almost certainly broken wire or bad connection. |
When running the car with PP the upstream Sensor switches between 50mV and 900mV but not as rapidly as i would expect
The Downstream sensor stays at 0mV - this sensor is 4 month old but is a noname product.
I Will try to switch the Two sensors just to see if i Can get a Reading from the Downstream
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| 206 GTi 2.0 2000 Trackday+ Daily
205 GTi 1.9 1987 Project
Citroen C4 Grand Picasso 2.0 VTR+ E6G 2008 Family car
---------------------------------------
Old cars
Mazda 3 1.6 16v Diesel 2008 - Peugeot 405 1.9 Diesel 1989 - Peugeot 309 1.4 Kick 1991 - Vw Polo 1.3 HIT 1986 - Mazda 626 1.8 1988 - Peugeot 205 GTI Project car - Ford Escort 1.6 16v 1996 - Peugeot 205 1.4 XR | |
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Posted: Tue Dec 09, 2014 12:40 pm |
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Joined: Jan 13, 2013
Posts: 46
Trade Rating: 0
Location: Denmark
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| 206gt160 wrote: |
| That manifold is beautiful |
And the car runs great, besidde this issue, and Sound good and loud 
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| 206 GTi 2.0 2000 Trackday+ Daily
205 GTi 1.9 1987 Project
Citroen C4 Grand Picasso 2.0 VTR+ E6G 2008 Family car
---------------------------------------
Old cars
Mazda 3 1.6 16v Diesel 2008 - Peugeot 405 1.9 Diesel 1989 - Peugeot 309 1.4 Kick 1991 - Vw Polo 1.3 HIT 1986 - Mazda 626 1.8 1988 - Peugeot 205 GTI Project car - Ford Escort 1.6 16v 1996 - Peugeot 205 1.4 XR | |
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