Rev issue: Hit 0.7 bar but not rev over 5Krpm in all gears...
#31
09-01-2011, 05:30 AM
failures like this could have many sources
ignition: spark plugs or coils......issue is when boost ore torque comes into play
boost leak.....issue low boost or with big leak cel and no power
fuel pressure....issue most under boost
maf.....issue hesitation at acceleration/disconnect maf and try it again
you have to check all systematic with durametric and a little test equipment before you change parts/ LOOK AT LIFETIME DATA/LOG File durin
g failure
only sometimes you find exotic failures like worn cats/def ecu`s......
ignition: spark plugs or coils......issue is when boost ore torque comes into play
boost leak.....issue low boost or with big leak cel and no power
fuel pressure....issue most under boost
maf.....issue hesitation at acceleration/disconnect maf and try it again
you have to check all systematic with durametric and a little test equipment before you change parts/ LOOK AT LIFETIME DATA/LOG File durin
g failure
only sometimes you find exotic failures like worn cats/def ecu`s......
#32
09-01-2011, 05:45 AM
Registered User
Join Date: May 2010
Location: Scotland
Posts: 1,482
Rep Power: 97 
Is that the only code you have had:
*********************************
Or have you some more codes??
It does say Maf above, so may be worth at least trying one. I always keep a spare in the car, wrapped up in a small sweet tin. Just in case.lol
0-36.5
P0175
Oxygen Sensing Adaptation, Idle Range, Bank 2 –
Below Limit
Below Limit
Diagnosis conditions
•
Oxygen sensing system active
•
Time elapsed after engine start-up: 250 to 350 seconds (USA)
•
Time elapsed after engine start-up: 302 to 402 seconds (RoW)
•
Engine temperature greater than 60 °C
Possible fault cause
♦
Incorrect signal from MAF sensor
♦
Fuel pressure too high
♦
Fuel injector leaking
♦
EVAP canister purge valve open
Affected terminals
-
Diagnosis/Troubleshooting
♦
If DTC P0445 (fuel tank vent valve - short to ground) is stored, correct this fault first. An open EVAP canister
purge valve can lead to the lean threshold being reached.
purge valve can lead to the lean threshold being reached.
♦
For vehicles in the USA, the upper load range will probably not be reached. The only case in which a fault could
be stored is during driving while towing a trailer or caravan on a hill.
be stored is during driving while towing a trailer or caravan on a hill.
♦
Contrary adaptation values in connection with misfiring point to incorrectly adjusted control timescheck control
times and adjust if necessary.
times and adjust if necessary.
♦
If the fuel tank reserve light is switched on, no fault is entered.
*********************************
Or have you some more codes??
It does say Maf above, so may be worth at least trying one. I always keep a spare in the car, wrapped up in a small sweet tin. Just in case.lol
#33
09-01-2011, 06:10 AM
if the maf did not work correct /disconnect maf and run engine with this quick test
#35
09-01-2011, 06:52 AM
Is that the only code you have had:
*********************************
Or have you some more codes??
It does say Maf above, so may be worth at least trying one. I always keep a spare in the car, wrapped up in a small sweet tin. Just in case.lol
0-36.5
P0175
Oxygen Sensing Adaptation, Idle Range, Bank 2 –
Below Limit
Below Limit
Diagnosis conditions
•
Oxygen sensing system active
•
Time elapsed after engine start-up: 250 to 350 seconds (USA)
•
Time elapsed after engine start-up: 302 to 402 seconds (RoW)
•
Engine temperature greater than 60 °C
Possible fault cause
♦
Incorrect signal from MAF sensor
♦
Fuel pressure too high
♦
Fuel injector leaking
♦
EVAP canister purge valve open
Affected terminals
-
Diagnosis/Troubleshooting
♦
If DTC P0445 (fuel tank vent valve - short to ground) is stored, correct this fault first. An open EVAP canister
purge valve can lead to the lean threshold being reached.
purge valve can lead to the lean threshold being reached.
♦
For vehicles in the USA, the upper load range will probably not be reached. The only case in which a fault could
be stored is during driving while towing a trailer or caravan on a hill.
be stored is during driving while towing a trailer or caravan on a hill.
♦
Contrary adaptation values in connection with misfiring point to incorrectly adjusted control timescheck control
times and adjust if necessary.
times and adjust if necessary.
♦
If the fuel tank reserve light is switched on, no fault is entered.
*********************************
Or have you some more codes??
It does say Maf above, so may be worth at least trying one. I always keep a spare in the car, wrapped up in a small sweet tin. Just in case.lol
My suggestion having at the moment is going to MAF now...
Last edited by boyg; 09-01-2011 at 07:05 AM.
#36
09-01-2011, 06:53 AM
Hesitate since 4xxx rpm, keeps like missfire and not rev smooth.
Last edited by boyg; 09-01-2011 at 06:57 AM.
#39
09-01-2011, 07:45 AM
next would test fpr....at the fuelfilter is a valve/connection to do that quick...test fuelpressure....if engine stand still 3,8bar activate fuelpump with with durametric.... under load test at street add boost 0.7=
bar....4,5bar....
Last edited by winnigt2; 09-01-2011 at 08:06 AM.
#40
09-01-2011, 07:57 AM
Unplug it and use meter to measure it?
#41
09-01-2011, 08:08 AM
use meter and do in line with the fuelhose....(engine stand still 3,8 bar...under load with added boost+ 0,7 bar= 4,5bar)
Last edited by winnigt2; 09-01-2011 at 08:11 AM.
#42
09-01-2011, 08:32 AM
Registered User
Join Date: Mar 2009
Location: beirut lebanon
Age: 49
Posts: 726
Rep Power: 52
i had the same problem,it was O2 sensor without any fault code in the memory,i datalogged the car and recognised that the bank 2 was running lean,and since i replaced it my problem is solved.
#43
09-01-2011, 08:45 AM
that could be a problem too...correct....with datalog you must see different signals..so you can change left to right....(and if the failures goes to the other side you are shure the lambda is dead)
#44
09-01-2011, 09:12 AM
Will have a try on weekend, under load which is pressing the pedal in natural shift?
#45
09-01-2011, 09:14 AM
Plugs - replaced
F hose - replaced
DVs - replaced
All turbo hose - replaced
Coils - replaced
............but my issue is still the same, poor me, so O2 sensors now in my list too.