Melbowski
15+ Year Contributor
- 95
- 12
- Mar 23, 2008
-
Reese,
Michigan
First off, my car is a 98 Talon TSI/AWD, BOV is recirculated, FMIC, and ported 14b. Well, as the title states my idle drops (roughly 300rpm) when I push in the clutch at idle, but only when up to operating temp. If I rev the engine with the clutch in at operating temp, the car dies like you turned off the key, no sputtering or nothing. Meanwhile if I don't push the clutch it is fine, it idles perfectly at 750, and when reved it comes down very smooth and idles great. When driving the rpm's drop like a brick when I push the clutch, and it will stall between every shift if I shift like an old lady.
Long story short the car developed crankwalk (~ 20 thousandths with 160k on stock bearings, is that abnormal wear?) and had this issue, but with replaced bearings it still has the exact same problem, and the end-play is well within spec. So I changed the crank sensor, however the original looks fine, no sign of it ever getting touched. I also changed all the fluids and there were no shavings in the tranny or anywhere else. The problem persisted, so I searched multiple DSM forums which lead me to clean out the throttle body, aic, and tps, but nothing changed. From there I replaced most of the vacuum lines, and can't find any boost or vacuum leaks, so what gives?
I posted over at DSMTalk, and mostly all I received was "OMFG Crankwalk yo!" followed by the classic walking crank pictures. While I do understand that I had crankwalk, I can't see why the problem would remain the same with the crank in spec. I had expected that if it were true crankwalk that the symptoms would eventually come back, but they never left! Anyway, I figure if my car has cancer I should at least get a second opinion before I perform surgery and swap in a 6bolt.
So what's the consensus? Why didn't the problem go away with new bearings, at least for a little while? Is this something more than crankwalk, or am I just crazy? Sorry for the novel, but thanks for taking the time to read it. I appreciate any opinions or ideas. Thanks in advance.
Melbowski
Long story short the car developed crankwalk (~ 20 thousandths with 160k on stock bearings, is that abnormal wear?) and had this issue, but with replaced bearings it still has the exact same problem, and the end-play is well within spec. So I changed the crank sensor, however the original looks fine, no sign of it ever getting touched. I also changed all the fluids and there were no shavings in the tranny or anywhere else. The problem persisted, so I searched multiple DSM forums which lead me to clean out the throttle body, aic, and tps, but nothing changed. From there I replaced most of the vacuum lines, and can't find any boost or vacuum leaks, so what gives?
I posted over at DSMTalk, and mostly all I received was "OMFG Crankwalk yo!" followed by the classic walking crank pictures. While I do understand that I had crankwalk, I can't see why the problem would remain the same with the crank in spec. I had expected that if it were true crankwalk that the symptoms would eventually come back, but they never left! Anyway, I figure if my car has cancer I should at least get a second opinion before I perform surgery and swap in a 6bolt.
So what's the consensus? Why didn't the problem go away with new bearings, at least for a little while? Is this something more than crankwalk, or am I just crazy? Sorry for the novel, but thanks for taking the time to read it. I appreciate any opinions or ideas. Thanks in advance.
Melbowski
not ICS
jeje
