Hi all,
Vectra c z22se, on cold start (mainly early mornings, but can happen after a few hours sitting) the car starts up fine, soon as u turn the key its running, as the revs start to drop within 10-30 seconds it starts hunting and knocking bad and stalls, turn it back on, fires straight away may do exactly the same thing or be fine, when its been forced to run (keep accelerator pressed, it will try to die but then will redline) then its fine, drives exactly has it always has.
op-com fault codes are:
P0132 O2 sensor circuit high voltage bank 1 sensor 1 (not present)
P0135 O2 heater circuit malfunction bank 1 sensor 1 (present)
changed spark plugs, taken throttle body off but was still clean from last time i cleaned it, egr is blanked and has cheater, coolant temp sensor changed with a genuine one, still the same, when i erased codes with op-com the car was fine for until 2 days later it developed again, when plugs were changed it was fine for a day then returned. if i do short runs it will keep doing it every time i start the car having sat a few hours, however if i give it a good half hour run with high revs it wont happen until next morning.
Any ideas?
Vectra c z22se, on cold start (mainly early mornings, but can happen after a few hours sitting) the car starts up fine, soon as u turn the key its running, as the revs start to drop within 10-30 seconds it starts hunting and knocking bad and stalls, turn it back on, fires straight away may do exactly the same thing or be fine, when its been forced to run (keep accelerator pressed, it will try to die but then will redline) then its fine, drives exactly has it always has.
op-com fault codes are:
P0132 O2 sensor circuit high voltage bank 1 sensor 1 (not present)
P0135 O2 heater circuit malfunction bank 1 sensor 1 (present)
changed spark plugs, taken throttle body off but was still clean from last time i cleaned it, egr is blanked and has cheater, coolant temp sensor changed with a genuine one, still the same, when i erased codes with op-com the car was fine for until 2 days later it developed again, when plugs were changed it was fine for a day then returned. if i do short runs it will keep doing it every time i start the car having sat a few hours, however if i give it a good half hour run with high revs it wont happen until next morning.
Any ideas?