Previous Owner had intake manifold cleaned 20k miles ago.
I wonder if the integral EGR valve was damaged in the cleaning process - I am having the following symptoms:
1. CEL: intermittent egr control difference, on for about 20 days
2. Noise: when it makes the noise it happens immediately after cold engine start, but not everytime and never on warm engine start, so far; almost sounds like it might be a bad starter, but only began after CEL came on. As I understand it, the EGR cycles during idle and and is operated by vacuum.
3. Low mpg: consistently ~40mpg; may or may not be related... (pre-existing condition and maybe another issue)
4. Some oil consumption on last long roadtrip... may be normal from what I have read from other owners since it seems to level off consumption when it gets to lower side of hash mark on dip stick.
5. Some exhaust fumes noticed under oil fill cap
The car starts and runs great. It has good pull and sounds fine too.
Let me know what you think.
I wonder if the integral EGR valve was damaged in the cleaning process - I am having the following symptoms:
1. CEL: intermittent egr control difference, on for about 20 days
2. Noise: when it makes the noise it happens immediately after cold engine start, but not everytime and never on warm engine start, so far; almost sounds like it might be a bad starter, but only began after CEL came on. As I understand it, the EGR cycles during idle and and is operated by vacuum.
3. Low mpg: consistently ~40mpg; may or may not be related... (pre-existing condition and maybe another issue)
4. Some oil consumption on last long roadtrip... may be normal from what I have read from other owners since it seems to level off consumption when it gets to lower side of hash mark on dip stick.
5. Some exhaust fumes noticed under oil fill cap
The car starts and runs great. It has good pull and sounds fine too.
Let me know what you think.
