Originally Posted by
tirekillinss
just registered to this form today, so if i mess up, don't get mad. most LB7 and LLY injector problems come from the fuel filter and how it is re-assembled after repairs are made, i have worked on these engines from day one, they do not like debris (of anything bigger than 5 micron) past the filter. most aftermarket filters stop 20 micron and larger, oem filters trap 6 micron and larger, as far as measuring for high return rate, as of right now, can only be done by disassembly and attaching hoses and measuring beekers, and not with a scan tool (bad move on GM)........hope this answers at least some of your question.......