Also, I cannot find a vacuum off the booster could the booster cause this? I think you may be right about the gaskets at TBI just wondering about booster, the van has been sitting for a couple years the first thing I did was replace the vacuum lines on top, then the next day the vacuum lines from gas tank to canister just fell out from under it and I replaced them and then yesterday doing the tuneup and bleeding brakes was the most work I have done to it and now I am where I am at with it. So, I am leaning toward the gaskets. Also when the van is running, push the pedal I can hear an electric whining sound comes from around the TBI cannot identify it cannot find EGR valve either there is a cylinder with a plug on the back side of it this sits where I have always known the EGR valve to be. I am trying to put everything out there on this as I am stumped.
Friday, July 15th, 2016 AT 11:16 AM