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You should take the 2 TPS sensors off to get into "timing mode." With the car running, pull the TPS plugs from the throtte body. It will not throw the CEL, you'll hear the tone of the engine change, then it'll adjust itself accordingly. Rev the engine 2-3 times past 2,000rpm, then adjust. Make sure you don't have any accessories on and the fans are not on when you check the timing light.
If you can borrow a timing light, just do it yourself, it takes about 10 minutes, all you need is a 12" socket and a flat head. It's not worth paying someone to do it.
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