Hi all. This is actually about a Buick LaSaber but its got a chevy engine in it and thought some one knowledge able here might be able to help... (this is a friends car).

Anyway, he says its missing when he decelerates. He changed the plugs and wires 6 months ago and this just started happening a few days ago. He also says that the check engine light *DOES NOT* show any trouble, so what ever the problem is I guess the computer is unaware of it.

Would appreciate any insite...

thanks in advance

 

check fuel pressure, cap & rotor maybe