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Message: <blockquote data-quote="Terrorist 5.0" data-source="post: 1554459" data-attributes="member: 30689">Hi everyone, just got done pulling a new clutch and some other stuff in the car, and when I went to drive it for the first time, I noticed something that was new.Typically when I drive, I don’t pull the stick out of gear until the engine is basically at idle or just above when coming to a stop. I didn’t get any bucking I’m any gear at all. After I finished putting in my new clutch, I get a bucking when my foot is off the pedal at any rpm at or under 1300 RPM in 4th only. I can’t tell if it is the engine or the driveline, but it is quite annoying.A couple things that could provide some detail, the flywheel is slightly lighter than factory. It is just under 19 pounds. Stock is 20-24 pounds according to most sources. I understand that lighter flywheels can cause something like this, but it is barely lighter than stock so… I also found my passenger side H pipe to manifold flange to be loose (the car is significantly quieter now that I fixed that lol), but I’m wondering if that impacted what the oxygen sensor sees in a significant enough way. I could also use new U joints, which could be a culprit.The only thing that is stumping me is why it only occurs in 4th. I get that 4th is 1 to 1 ratio, but shouldn’t this show in all gears? The only thing I can think of that can cause this is something EGR related. It should come into play at the speeds I am going during the bucking, but then again my foot is off the pedal. I checked for codes and got an all clear. If anyone else has had this before, chime in please. Thank you.</blockquote>