H1B Petition Approved, Want to Change Employer Before Stamping.

Employer A filed My H1B Petition, It is Approved and Work Start date is October 2014.

I left my job and came to USA on B1 as Employer A forced me to do so, I do not have a job at the moment and the salary offered by Employer A from October 2014 is very low.

 

I want to look for a full time employment with a good and better MNC Employer B. 

During Stamping with either Employer A or B, will there be any issues with respect to my B1 Travel and break in Career.

 

Kindly requesting your suggestions in my case.