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csweatherston

posted on 15th Aug 06 at 12:39

i had this problem......qdm - then all of a suddon it cleared itself lol

new ecu from vaux was £400ish iirc


iceman

posted on 15th Aug 06 at 12:27

oh if the ecu was dead the car shouldnt run should it?


Dave A

posted on 15th Aug 06 at 12:16

qdm = dead ecu IMO


iceman

posted on 15th Aug 06 at 11:30

the engines fine :) the knock sensor was knackered hense why it was bring up an open circut its the qdm error code that is worrying me as the car wont rev over 4900

[Edited on 15-08-2006 by iceman]


Dave A

posted on 11th Aug 06 at 17:03

but an engine wont knock if theres oil in it.

for an engine to knock because of low oil it would need to be so low that the oil pickup is sucking air. but by that time the oil pressure light would be on.


Joe

posted on 11th Aug 06 at 16:44

Yeah we have alot of that too, usually z16xe's with about 1 litre of oil left.


bubble

posted on 11th Aug 06 at 16:40

quote:
Originally posted by Dave A
quote:
Originally posted by bubblevaux
qdm means Quad Driver Module. normally come up when thinks car is extremely low on oil. if knock sensor is open circuit then it will throw up QDM, knock sensor is used to detect low oil level when the engine knocks.


the knock sensor is used to detect engine knock or 'pre-ignition' and adjusts the ignition timing to suit. it has no connection to low oil levels


er yeah......and engines knock to low oil level:|

most of the eml jobs at work are z16se astra's showing knock control circuit due to low oil level.


iceman

posted on 10th Aug 06 at 21:31

its not knocking the engine is sweet :D


iceman

posted on 10th Aug 06 at 21:30

not low on oil the car has just been serviced :)


Dave A

posted on 10th Aug 06 at 20:16

quote:
Originally posted by broster
quote:
Originally posted by Dave A
quote:
Originally posted by bubblevaux
qdm means Quad Driver Module. normally come up when thinks car is extremely low on oil. if knock sensor is open circuit then it will throw up QDM, knock sensor is used to detect low oil level when the engine knocks.


the knock sensor is used to detect engine knock or 'pre-ignition' and adjusts the ignition timing to suit. it has no connection to low oil levels


detects noise, if its low on oil engine will get noisey lol


detects vibrations actually:P

anyway if it was low enough on oil to start knocking then the engine is probably knackered.


jazzer2k3

posted on 10th Aug 06 at 18:13

U wanna give cos vaux a ring ... if ur close to it ??

Thats an awsome place for ECU's and the like, ive got one spare .. but i jus relised urs is 2L :(


broster

posted on 10th Aug 06 at 18:04

quote:
Originally posted by Dave A
quote:
Originally posted by bubblevaux
qdm means Quad Driver Module. normally come up when thinks car is extremely low on oil. if knock sensor is open circuit then it will throw up QDM, knock sensor is used to detect low oil level when the engine knocks.


the knock sensor is used to detect engine knock or 'pre-ignition' and adjusts the ignition timing to suit. it has no connection to low oil levels


detects noise, if its low on oil engine will get noisey lol


iceman

posted on 10th Aug 06 at 17:53

anyone got 1 i could try pls :D


jazzer2k3

posted on 10th Aug 06 at 17:51

knocksensor is a shocker for goin wrong, i remember my engine swap - i had exactly same thing ... But figured out it was a c16xe wiring loom not x :P

Ye jus change the ecu


iceman

posted on 10th Aug 06 at 17:46

ive changed the knock sensor for a brand new 1

What do you rekonmend i do next? change the ecu?


Dave A

posted on 10th Aug 06 at 17:31

quote:
Originally posted by bubblevaux
qdm means Quad Driver Module. normally come up when thinks car is extremely low on oil. if knock sensor is open circuit then it will throw up QDM, knock sensor is used to detect low oil level when the engine knocks.


the knock sensor is used to detect engine knock or 'pre-ignition' and adjusts the ignition timing to suit. it has no connection to low oil levels


Dave A

posted on 10th Aug 06 at 17:28

in my experience the QDM fault is a knackered ecu. Had this twice, swopped ecu's and it was fine.


bubble

posted on 10th Aug 06 at 16:44

qdm means Quad Driver Module. normally come up when thinks car is extremely low on oil. if knock sensor is open circuit then it will throw up QDM, knock sensor is used to detect low oil level when the engine knocks.


iceman

posted on 10th Aug 06 at 14:41

x14xe corsa


J100RSA

posted on 10th Aug 06 at 14:37

what engine stu??


iceman

posted on 10th Aug 06 at 14:36

I had the corsa Tech1'd a couple of days ago and it come up with 2 faults
1) Knock sensor open circuit
2) Qdm something ( I cant remember what )
I've put on a new knock sensor but the engine management light is still on and the car wont rev about 5k, it feels like its hitting the limiter. I've given it a full service ( Plugs, oil, filter,air filter, fuel filter)
Can anyone help?
Stu
:wave: