SLIGHT BOBBLE?? REPLACED INJECTORS PLENUM GASKETS & HOSES

[BOUDREAUX]

I just replaced all of my fuel injectors, plenum gaskets and a majority of the hoses. I have a slight bobble which is about a tenth as bad as I had before. The bobble is inconsistent. I feel it when stopped at a light (in drive), but not when the car is in park. The bobble goes away once I get up to 40-45 mph. I checked all of the hoses to look for a vacuum leak. I hear a slight hiss form the fuel pressure regulator area, but I am nor sure if it is vacuum hiss. I didn’t replace the EGR gasket (it was in bad shape, I have one on order). Also, when I removed the throttle body, I left the throttle position sensor attached Do I need to adjust it? All of my injectors read 12.2-12.6 ohm at the harness connector on the passenger side. Lastly, I replaced the fuel filter about three months ago.

Should the brass top on the fuel pressure regulator rotate? I noticed that the vacuum stem was out of its initial location so I rotated it back. No fuel is being sucked through the vacuum line.

Short of going to the dealer for a diagnostic test, what should I try?

I changed the injectors because I had four that where reading 22+ ohm and my power was cut by ½ and the bobble was horrendous!

Thanks,

Boudreaux

[bullittandy]

Sounds like a vacuum leak. To check for vacuum leaks use some volatile substance to spray various possible sources and watch for the engine to speed up.

I've used starting fluid but its scary stuff.