My brother has a fuel pressure gage, and it showed about 60psi at idle. He rev'ed it up and watched the gage and said it was still good, so we didn't think it was the pump or filter.
The part I'm referring to is the spider fuel injector, like this one:
http://cgi.ebay.com/ebaymotors/GMC-S...Q5fAccessories
You have to take off the intake plenum to get to it. Speaking of the intake plenum, is that difficult to remove? Do you need specialized equipment or tools?