2007 Suzuki Forenza shifting problem

2007 SUZUKI FORENZA
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WHITNEY AUTO AND DIAGNOSTIC
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customer states that the car has a problem getting over 45 mph. at times. no check engine, but scanned pcm and tcm and found code p0703 stored in the tcm. testing the brake light switch and it test fine. no problem with lights not working.
Nov 5, 2013 at 3:43 PM
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JACOBANDNICKOLAS
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To be honest, I don't see how that code would relate to the problem you are having. Have you checked the catalytic converter to see if it possibly plugged? Have you checked fuel pump pressure?
Nov 5, 2013 at 5:16 PM
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WHITNEY AUTO AND DIAGNOSTIC
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I have not check much. I can not get problem to happen while I have it. Not really sure what to check. I did head gasket job 2 months ago and she said everything has been great til a week ago.
Nov 5, 2013 at 5:44 PM
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JACOBANDNICKOLAS
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I would start with some basic checkes first and go from there.
Nov 6, 2013 at 5:33 AM