[newbie2010]

my olds has a hesitation when trying to pass or is under load.
1) no check engine light
2)replaced fuel pump-filter and pressure reg
3)replaced plugs-wires and coils
4)replaced throttle position-idle air- mass air sensors
5)replaced all known rubber vacuum tubes
6)it has 17 millibars of vacuum at the manifold
7)unknown fuel pressure
8)have not changed oil pressure-tcc-carbon canister or return fuel lines
9)ruff idle at start-up
10)have not changed crank or cam sensor

ANY IDEAS? I HAVE RUN OUT

[83chevytruck]

two things i would suggest is changing that camshaft position sensor as well as the crankshaft position sensor then you need to do a fuel induction service and see what that does. i had the same issue at work the other day and that fixed it.