I replaced the head on my 91 camry, put everything back together the way the haynes manual said, and now the damn car wont start. It turns over fine, its getting spark and fuel, but it wont run. I have checked all my grounds, and made sure my injectors are clipped on tight, but if the timing was off by about 2-3 teeth in the belt, would that make a difference? I imagine it would screw up my valves. Any help would be appreciated.