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Corsa Sport » Message Board » Help Zone, Modification and ICE Advice » Z20LET boost issue » Post Reply

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Corsa_Sport21

 posted on 12th Jun 12 at 14:35

Have you checked for boost leaks??

I would n't have thought limp mode would totally cut the boost altogether. Normally it would just make it run crap, but still try and give some boost, just with a shit load more fuel pumping through.


john_c20xe

 posted on 12th Jun 12 at 12:18

its possibly in limp mode, this maybe why its not boosting the ecu is probly cutting the boost. if your coolant temp sensor is faulty it maybe chucking in too much fuel or the other way around,
Your throttle pedal should be fly by wire so wont be cable operated, there can still be a fault with either the pedaql of the throttle body with it working ok,


Sly_SRi

 posted on 11th Jun 12 at 16:19

quote:
Originally posted by DERV-POWER
I d go with new throttle pedal and ect sensors first then


The throttle pedal is opening the throttle body fine, does that rule it out as being faulty?


DERV-POWER

 posted on 11th Jun 12 at 15:58

I d go with new throttle pedal and ect sensors first then


Sly_SRi

 posted on 11th Jun 12 at 13:24

Fault codes:

P1530 A/C Relay Voltage High Air Conditioning System B-10

P0530 A/C Refrigerant Pressure Sensor Circuit High Input Air Conditioning System B-05
P0530 A/C Refrigerant Pressure Sensor Circuit Open Air Conditioning System B-05

P0650 Malfunction Indicator (MI) Control Circuit High C-36
P0650 Malfunction Indicator (MI) Control Circuit Open C-36

P0115 Engine Coolant Temperature Circuit High Input C-11
P0115 Engine Coolant Temperature Circuit Low Input C-11
P0115 Engine coolant temperature circuit malfunction C-11

P1122 Accelerator Pedal Position Sensor 2 High Input C-08
P1122 Accelerator Pedal Position Sensor 2 Low Input C-08

P1120 Accelerator Pedal Position Sensor 1 High Input C-08
P1120 Accelerator Pedal Position Sensor 1 Low Input C-08
P1120 Accelerator Pedal Position Sensor 1-2 Correlation


Sly_SRi

 posted on 11th Jun 12 at 13:09

And btw, the dump valve in my dp is no longer installed.


Sly_SRi

 posted on 11th Jun 12 at 13:08

How exactly do you check the waste gate? We gave it a twist with some pliers to see if it was stuck and it moved, but not sure if that's a good enough test?


Corsa_Sport21

 posted on 11th Jun 12 at 11:45

Boost leak or wastegate stuck open would be the 1st things i would check.


Sly_SRi

 posted on 11th Jun 12 at 11:42

So I was driving my Corsa along, was all running fine, boosting normally etc and then suddenly the engine management light came on and it stopped boosting.

The boost gauge (which reads -10 during idle) will only boost up to zero but not beyond.

If I can't figure it out I'll be taking it to my local garage later in the week but thought I'd just ask on here in case anyone knows what it could be and save me some money!

Further info, the fault codes fro the Ecu were related to: throttle pedal & coolant temp

Any help appreciated!