Car is acting really bad, car was driving really bad, slow to acc, replaced fuel pump, pressure dropped to like 10 lbs then would come back up, ran fine for a couple of days, now car idles kinda rough, tach not boucing, foudn a couple of vaccum lines bad, replaced them, no change, just did a tune up like 3k agao so all new in that area, wires, coils, plugs...??? When driving it will be slow to get to 30, slow to accell, any ideas??? MIke

what is your fuel pressure now?

pressure of key on, not started:
idling:
under WOT conditions:

We need some clarification on what motor you have before we get too deep. Why did you transplant a Vin C motor in your car? Is your signature correct? What other work was done at the same time?

My olds was a c motor, mine is an L, fuel pressure now is like 35 to 40, at idle, wot is 50ish. when pump was replaced also included, filter and strainer, nothing else at that time. Now I add this only as to some insite to engine, 160k and needed valve cover and intake gaskets very, very bad, to be replaced with weekend. Mike

Thank you for getting that out of your signature. It clears the air a little.

I put new wires on, I had one against the exhaust manifold... Problems solved, Mike