#16: Re: Inlet Air Temp and Coolant Temp Author: Edward, Location: In the garagePosted: Tue Dec 09, 2014 2:35 pm ---- I hope you've got uprated engine mounts with that manifold.
#17: Re: Inlet Air Temp and Coolant Temp Author: Berth, Location: DenmarkPosted: Tue Dec 09, 2014 3:07 pm ---- Back from the cold
I connected the downstream sensor (after the cat) with the upstream plug and got a Reading in PP, that looks more correct than with the original upstream sensor, it changes more frequent and the top is 900mV.
So i need a new upstream sensor.
The plug from the upstream sensor didnt fit in the downstream plug
And i must have a broken wire somewhere between the connection and the ecu
What is the downstream used for it dosnt seem to make any readings but engine light dosnt go on and there are no errors?
#18: Re: Inlet Air Temp and Coolant Temp Author: Berth, Location: DenmarkPosted: Tue Dec 09, 2014 4:29 pm ----
Edward wrote:
I hope you've got uprated engine mounts with that manifold.
I did, actually i think that it was a post from you in the past that made me decide for the maniflow exhaust
Do you have issues with High CO?
#19: Re: Inlet Air Temp and Coolant Temp Author: kandlbarrett, Location: SwindonPosted: Thu Dec 11, 2014 11:16 am ---- Down stream is to check your CAT is doing its job. Don't be too quick to take the results to show upstream sensor is needed. The two lambdas will be slightly different so swapping them may cause the lambda, when used in a different exhaust position, to behave slightly differently.
Also some CATs (not all) need burst of the engine running lean to ensure the CAT works correctly and that is also part of the monitoring.
#20: Re: Inlet Air Temp and Coolant Temp Author: Edward, Location: In the garagePosted: Thu Dec 11, 2014 11:58 am ---- Are you checking the lambda sensor when the engine is cold? I don't think the sensor is used until maybe 70 degrees.
#21: Re: Inlet Air Temp and Coolant Temp Author: Berth, Location: DenmarkPosted: Thu Dec 11, 2014 1:31 pm ----
Edward wrote:
Are you checking the lambda sensor when the engine is cold? I don't think the sensor is used until maybe 70 degrees.
Only the last test to see if it could register anything with the other sensor
With pp2000 ready on a cold car, the upstream sensor Will show a constant around 900mV for 30-60sec i guess that during this process the sensor is heatet up? After this it Will start to shift between High and low.
I am not sure that pp2000 is the best method for testing the lamba, it seems a little sluggish when updating the screen, an oscilloscope would be better?
#22: Re: Inlet Air Temp and Coolant Temp Author: Berth, Location: DenmarkPosted: Thu Dec 11, 2014 1:36 pm ----
kandlbarrett wrote:
Down stream is to check your CAT is doing its job. Don't be too quick to take the results to show upstream sensor is needed. The two lambdas will be slightly different so swapping them may cause the lambda, when used in a different exhaust position, to behave slightly differently.
Also some CATs (not all) need burst of the engine running lean to ensure the CAT works correctly and that is also part of the monitoring.
Great so i need to have pp2000 with me in the car to verify.
I changed the upstream sensor today, and moved it so now it Will get gas from all 4 cylinders.
The CO tester at the local do it your self garage was broken so haven't testet yet
#23: Re: Inlet Air Temp and Coolant Temp Author: Steve206, Location: UKPosted: Thu Dec 11, 2014 2:03 pm ---- Engine idle speed looks a little low?
#24: Re: Inlet Air Temp and Coolant Temp Author: Berth, Location: DenmarkPosted: Tue Dec 16, 2014 10:31 am ---- Got a new laptop with pp2000 and took the car for a run
Outside temp 5C
Car was cold when starting, coolant temp in PP started at 56C after a 10-15 min run PP where at 42C?
Then Dashboard temp gauge Said 90C and the fan started....
If the ecu never get a coolant temp of 80C an above Will it then keeper running Rich?
#25: Re: Inlet Air Temp and Coolant Temp Author: kandlbarrett, Location: SwindonPosted: Tue Dec 16, 2014 10:53 am ---- You probably have two sensors. One for ECU and fueling. The second for gauge temp. Haynes manual is very good on this point of what sensors do what.
Time to try a swap of the sensor that sends its signal to the ECU.
Depending on how long you have been running rich, if that is the problem, your CAT my now be knackered - they don't like excess fuel and it will destroy them.
I do still have a niggling doubt about running rich as the first sensor is still switching though slowly.
#26: Re: Inlet Air Temp and Coolant Temp Author: Berth, Location: DenmarkPosted: Wed Dec 17, 2014 10:02 am ----
kandlbarrett wrote:
You probably have two sensors. One for ECU and fueling. The second for gauge temp. Haynes manual is very good on this point of what sensors do what.
Time to try a swap of the sensor that sends its signal to the ECU.
Depending on how long you have been running rich, if that is the problem, your CAT my now be knackered - they don't like excess fuel and it will destroy them.
I do still have a niggling doubt about running rich as the first sensor is still switching though slowly.
I have tried changing the coolant temp sensor, the resultat is the same,
how reliable is the Pp2000 "china" model, would it make sense to try another obd box?
#27: Re: Inlet Air Temp and Coolant Temp Author: Berth, Location: DenmarkPosted: Wed Dec 17, 2014 2:39 pm ---- I am not the only one with this issue
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