copyboy311 Posted July 19, 2012 Share Posted July 19, 2012 My 03 Legacy is getting real jerky on acceleration and deceleration in a super-sensitive way that I can't smooth out. It's not so much a clutch-engagement issue (as far as I can tell) as it is a throttle issue. When I let off the gas in gear, the driveline is noticeable thumpy and jerky. When I accelerate in gear it jerks again. It's far more pronounced in lower gears, especially in stop and go traffic -- like if I'm driving in first or second gear and throttling on and off without using the clutch, it's real jerky. It's less jerky in higher gears. Also, it seems worse when the A/C is on. Would a gear-oil change help at all, or is this caused by some other issue? I've also suspected maybe the driveshaft/u-joints? I'm at 154K and the original clutch. It's just very sloppy overall, when it used to be much tighter. I've had the car since 19K miles. Link to comment Share on other sites More sharing options...
Max Capacity Posted July 20, 2012 Share Posted July 20, 2012 Vacuum leak, is my guess. 305,600miles 5/2012 ej257 short block, 8/2011 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. (SOLD). CHECK your oil, these cars use it. Engine Build - Click Here Link to comment Share on other sites More sharing options...
copyboy311 Posted July 20, 2012 Author Share Posted July 20, 2012 Vacuum leak, is my guess. I'm pretty sure it's a driveline issue. The engine itself doesn't stutter when this happens (although it does sometimes separately). Link to comment Share on other sites More sharing options...
Rockford Posted July 25, 2012 Share Posted July 25, 2012 This problem, I have it. I suspect it's partially my tune but mostly drivetrain slop. I have Group N trans/crossmember mounts on order as I've read that they help. Link to comment Share on other sites More sharing options...
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