delcowizzid
on holiday
Put the stock memcal in and see if error code 24 goes away
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Thanks MikeC,Code 42 is the spark timing circuit- basically the ignition module. There are a lot of tests that can be done on this module but you really need to be an auto electrician to do them. But an easy initial check for code 42 is clean and check terminals B5,B3,D4 and D5 on the ECM-their the ones that control this timing circuit.
When mine failed 8 years ago I replaced it with an exchange Holden V8 5 litre racing module from nuclearpoweredmodules on ebay. Top bit of gear- the bloke really knew his stuff.