How much vacuum at idle?

gray87GT · 05-16-2001, 05:10 PM

jimberg- Thanks for the info. Yeah, I have the BBK plenum spacer with no EGR port, and I also disconnected the one(i think one)vacuum line to the EGR valve. You are right, I cruise in gear with clutch out at low RPM's fine.......the only problem is when I BARELY touch the throttle. It seems like the problem is when there is VERY little or NO load on the engine, if I drive part throttle it runs great. It feels like it's carburated and the instant I apply a little throttle it loads up. I changed the fuel filter last week, I was hoping that would fix it. I have fuel pressure set at 39# w/o vacuum. Could it be the cam/head combo? I really don't know. I really appreciate all your help, along with everyone elses.

One more ? jimberg. If I wanted to put my air pump back on, would I have to install the metal tubing to the back of my heads? And if I have to do that do I have to drill the holes in the exhaust ports to activate the smog rail? Or can I just hook the pump another way? Thanks

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05-16-2001, 05:10 PM	#15
gray87GT Registered Member Join Date: Jan 2001 Location: Minnesota Posts: 177	jimberg- Thanks for the info. Yeah, I have the BBK plenum spacer with no EGR port, and I also disconnected the one(i think one)vacuum line to the EGR valve. You are right, I cruise in gear with clutch out at low RPM's fine.......the only problem is when I BARELY touch the throttle. It seems like the problem is when there is VERY little or NO load on the engine, if I drive part throttle it runs great. It feels like it's carburated and the instant I apply a little throttle it loads up. I changed the fuel filter last week, I was hoping that would fix it. I have fuel pressure set at 39# w/o vacuum. Could it be the cam/head combo? I really don't know. I really appreciate all your help, along with everyone elses. One more ? jimberg. If I wanted to put my air pump back on, would I have to install the metal tubing to the back of my heads? And if I have to do that do I have to drill the holes in the exhaust ports to activate the smog rail? Or can I just hook the pump another way? Thanks