Hello, I have a 2004 January plated 6.6 lly started going into limp mode (2000 rpm only) at less than 5000km, the truck was imported from Canada to Australia and converted left to right hand drive from new.
We changed the fuel filter several times, throttle position sensor, turbo control valve and map sensor with no change. Sent truck to a diesel dyno shop which have no lly or lb7 background at all, this is the test description, roadtest truck and fault diagnosis, carry out 4wd dyno tests and diagnostics, supply and fit boost test point reassemble and record 22lbs boost and p0239, p0102, p1093 fault codes. Test ALDL wiring and connections. Circuit test engine control module, fuel control module, transmission control module, body harness, instrument and dash harnesses. Test serial port wiring and verify that no wiring faults can be located. Verify engine MIL operation. All OK
Carry out fuel return flow and volume tests on standard Australian equipment and could not relate to known figures.
Download GM information and test procedures. Carry out fuel system test. Reassemble intake, turbo, FCM, PCV and fuel return systems to standard and retest.
Carry out scan tool command test procedures and confirm system functions to standard overide ECM and command fuel system operations to test real time fuel pump operation and return line flow, verify that electro mechanical systems do function as required if requested to do so.
Call up vehicle history information, make necessary calls to Canada and USA dealer, distribution networks to verify diagnostic opinion and report.
Software faults pre-existing from factory appears to cause the ECM to direct the FCM to reduce main rail pressure from 23200PSI to 15950PSI which in turn induces a limp home mode.
I believe that the ECM program is a fault and requires reprogramming.
The ECM has be reprogrammed twice now, now waiting for new ECM to arrive from the US.
The truck has been in the shop for 12 weeks.
Also is it normal to have full power with accelorator pedal only half to the floor.
I've posted threads every where, and had very little to no response, surely someone has some ideas, as you can see, we are going round and round in circles. HELP VERY MUCH APPRECIATED.

email address: lavenco@albury.net.au

do you think someone could have been damaged when they did the conversion? from what i've heard, they take it pretty much all the way apart and put it back together. i know there is another member here who had his truck imported to OZ and converted to right hand drive. something like aussie dmax i think is his name.

check mass air flow sensor is related to all the symtoms could not find code p0239 listed in gm service information p0102 is mass air flow sensor code and will affect turbo also check fuel return rate from injectors could be returning to much fuel also p1093 is for fuel pressure regulator

what fuel return rate should we have from the injecters and what the procedure for this test