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Old 03-14-2005, 02:36   #1 (permalink)
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AU Problems

Hey guys
2 weeks ago i done the head gasket on the au. My brother in law who is a mechanic done the head gasket for me with me as his aid. Got the head serviced and some mods done to the valves plus a stage 2 cam. Put the car back together and couldn't have been happier. The car was pulling really well and drove beautifully. On friday while driving the car it had a really big flat spot between 2000-2400 and really didn't want to go until about 2800. FRom idle to 2000 i was excellent and then it was if the car had no power then once it worked its way to 2800 it starts pulling again. on saturday the car overheated and went into limp mode, a faulty thermostat was the problem. i replaced this on sunday and took it for a drive seemed all good and well. Today i took the car to pick up my son and the temp started climbing to the top of the normal range, the car went to limp mode before the warning light came on. I let the car cool down and started driving again the flat spot still continued and the car kept throwing itself in and out of limp mode. even when the car was at the bottom of the normal range it was still doing this. Any clue in what may be the problem.
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Old 03-14-2005, 02:53   #2 (permalink)
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Re: AU Problems

have you flashed your ecu to compensate for the cams?
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Old 03-15-2005, 01:15   #3 (permalink)
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Re: AU Problems

it shouldnt over heat at allll......... are u sure u tensioned the headecorrectly.. did u use a an gasket?
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Old 03-15-2005, 01:37   #4 (permalink)
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Re: AU Problems

All the head was tensioned properly. i haven't had the computer flashed to suit the cam. I was not aware this had to be done or how it was done. replaced the thermostat with one that opens 2 degrees earlier to compensate for the cam a valve work.
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Old 03-15-2005, 01:40   #5 (permalink)
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Re: AU Problems

an gasket ?? Also i have a lost idle quality as well. seems to have a small miss.
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Old 03-15-2005, 01:45   #6 (permalink)
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Re: AU Problems

you wont need the ecu flashed .......... for such a small cam.. this wont cause over heating.... There must be an air lock.. or somthing causing over heating.... is the radiator blocked.....?
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Wade 977b cam
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Old 03-15-2005, 02:19   #7 (permalink)
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Re: AU Problems

someone else suggested this so i might need this done. But will tis cause the car to go in limp mode at normal temp.
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Old 03-15-2005, 02:38   #8 (permalink)
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Re: AU Problems

the limp home mode is weird.. are u sure all the wiring is connected correctly at the manifold?..... by limp home mode u mean its getting stuck in 3rd gear?.. make sure the auto loom is connected correctly
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98 T5 gear box (was auto)
Wade 977b cam
3.7 lsd
AU bottem end
ELXR6 ported Head
PH4480 Pacemakers
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Old 03-15-2005, 02:39   #9 (permalink)
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Re: AU Problems

the limp home mode is weird.. are u sure all the wiring is connected correctly at the manifold?..... by limp home mode u mean its getting stuck in 3rd gear?.. make sure the auto loom is connected correctly.. did u damage the temp sensor when u done the head... the sensor is at the back of the head??? is it connected
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Old 03-15-2005, 10:31   #10 (permalink)
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Re: AU Problems

the sensor is connected and the head block would have remove it when he done a service. All wiring is right i've checked it all, when i say the car goes into limp mode its like it goes in tthe auto has a 5th gear and no power like the motor is labouring.
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