Hi, guys. 1998 4 cyl. I checked the EGR modulator and it's nice and clear. I tested the VSV valve down way down under the engine (the one that's a bi*ch to get to) and that is working also. The rubber tube from the EGV valve to the bottom of the EGR modulator was 100% gunked up with carbon. I had to use a 1/4" drill bit to get in there and clean it all out (I could have replaced the hose but I saved a couple bucks and the trip). Also, the steel nipple on the EGR valve that that hose goes on was also carboned up. I used I think a 3/32" drill bit to clear that.
I can't, however, remove the EGR valve because I broke of the head of one of the nuts on the bottom of it and due to the angle I can't get in there to drill it out. I know the bottom of the appx 5/8" pipe is not 100% carboned up because I can feel air flow though, but I'm thinking it might be kind of carboned up. And, where the EGR connects to the intake might also be carboned up. I CAN remove the EGR from the intake, but I can't move it too much because it's stuck on the pipe. I could take the intake off to access that hole between intake and EGR but that wouldn't solve cleaning out the pipe itself. So, how the heck do I get that pipe off? I can see the nut down there, but it's not going to be easy!
I can't, however, remove the EGR valve because I broke of the head of one of the nuts on the bottom of it and due to the angle I can't get in there to drill it out. I know the bottom of the appx 5/8" pipe is not 100% carboned up because I can feel air flow though, but I'm thinking it might be kind of carboned up. And, where the EGR connects to the intake might also be carboned up. I CAN remove the EGR from the intake, but I can't move it too much because it's stuck on the pipe. I could take the intake off to access that hole between intake and EGR but that wouldn't solve cleaning out the pipe itself. So, how the heck do I get that pipe off? I can see the nut down there, but it's not going to be easy!