Hey guys,
I've got an '88 325is that won't pass inspection. It has a rough idle when it's hot, but off idle, it runs well.
Here's a list of things we've checked, fixed or replaced:
Injectors
Carbon deposits on intake valves
Compression test: I don't recall the exact results, but it was something like 145, 150, 160, 160, 150, 145, from piston 1 to piston 6.
O2 sensor
Cat
Checked for closed loop
Intake manifold hoses
New spark plugs
Checked for vacuum leaks
Water temp sensor
Checked ingition with a scope
Checked the valve adjustment
Might be more I'm forgetting.
The results (cat was plenty hot):
HC ppm @ idle:
Max: 220
Reading: 1110
That's the only part it failed. Ideas?
I've got an '88 325is that won't pass inspection. It has a rough idle when it's hot, but off idle, it runs well.
Here's a list of things we've checked, fixed or replaced:
Injectors
Carbon deposits on intake valves
Compression test: I don't recall the exact results, but it was something like 145, 150, 160, 160, 150, 145, from piston 1 to piston 6.
O2 sensor
Cat
Checked for closed loop
Intake manifold hoses
New spark plugs
Checked for vacuum leaks
Water temp sensor
Checked ingition with a scope
Checked the valve adjustment
Might be more I'm forgetting.
The results (cat was plenty hot):
HC ppm @ idle:
Max: 220
Reading: 1110
That's the only part it failed. Ideas?
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