Hi there I am new to owning a holden as I have had fords all my life. My car is not running right and I am wondering if anyone could help me. My car has not got the ecotech motor. The car seems to idle fine at 1000rpm but if I accelerate hard it seems to want to die. (like a hard flat spot) I have found th error codes for it and they are 31- Theft deterant signal 55 - Analogue to digital error 56 - Running lean under load I have changed the MAF sensor, injectors, Leads and Plugs. I have also tryed a VS Coil Pack. I am just wanting to know if is anyone can shed some light as to how to fix my problems.
Code 56 indicates that there could be a problem with fuel pressure. The codes you have may be old ones. Try clearing the codes by disconnecting the negative battery terminal for about a minute and then reconnect it. Then run the car for while (go for a short drive) and then read the codes again and see what you get. If you have the stock radio you will need to enter the PIN after disconnecting the battery.
I read somewhere, most likley on JC, just remove the main engine fuse for a minute and then replace. Then you won't need to re-enter the radio PIN code.
