SledDawg2
Veteran Member
Car info: 2002 Jetta 5sp manual
Symptoms:
Engine idles very ROUGH. Driveability is poor as is acceleration.
The engine smokes excessively at idle and under light to moderate acceleration.
I had no DTC's while driving !
Observations:
I checked the injection timing and it is within the specified timing range.
I verified the static timing and with the cam lock installed and pump pinned the reference mark on the fly-wheel is at the bell housing index mark.
The fuel filter was replaced 6K miles ago.
I thought it was fueling problem. I had a known good spare injection pump installed. The pump install was "text-book" but the problem persist !
This morning I performed a compression test.
All of the numbers were good in the mid 400's with a 40 PSI split between the high and low cylinder. (I was impressed with this data as the engine has nearly 250K miles.
The intake manifold is clean (EGR deleted long ago).
My next thoughts lean towards a "clogged cat" but befor I go that route I would like some further opinions.
While I await your wise advice and insights I'll take a fuel sample just to see what is in the tank. (This was advice from my wife !)
1st update: I removed the fuel filter and drained the contents into a glass sample gar. The fuel is clear and free of visible water.
Symptoms:
Engine idles very ROUGH. Driveability is poor as is acceleration.
The engine smokes excessively at idle and under light to moderate acceleration.
I had no DTC's while driving !
Observations:
I checked the injection timing and it is within the specified timing range.
I verified the static timing and with the cam lock installed and pump pinned the reference mark on the fly-wheel is at the bell housing index mark.
The fuel filter was replaced 6K miles ago.
I thought it was fueling problem. I had a known good spare injection pump installed. The pump install was "text-book" but the problem persist !
This morning I performed a compression test.
All of the numbers were good in the mid 400's with a 40 PSI split between the high and low cylinder. (I was impressed with this data as the engine has nearly 250K miles.
The intake manifold is clean (EGR deleted long ago).
My next thoughts lean towards a "clogged cat" but befor I go that route I would like some further opinions.
While I await your wise advice and insights I'll take a fuel sample just to see what is in the tank. (This was advice from my wife !)
1st update: I removed the fuel filter and drained the contents into a glass sample gar. The fuel is clear and free of visible water.
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