I'm looking for some more hint on my '97 LX. (316k miles)
Almost a year ago and 13k miles, I cleaned out the intake passages, etc. the check engine light didn't come on until last month and of course it has to pass inspection before the end of October.
So, I tested the EGR valve and it wouldn't hold a vaccum, so I replaced it. That didn't solve the problem.
So, I decided to remove the manifold and try to clean it again.
After removing the upper intake manifold, the passages looked good. I ran a wire down the passage and it is clear and also sprayed cleaner through it and it flows freely.
Since it didn't look like clogged passage was the issue I looked at the following:
VSV - when 12v applied it is blocked, with 12v not applied, it's open, that includes getting air through the passage through the intake manifold
Temp Sensor - I'm getting .189 M-ohms at room temp (80ish degrees), if I heat it up, the resistance decreases.
After re-assembly, I'm still throwing the the same code.
(By the way, the idle is too high now, so I need to check for an unmetered air leak also)
Anything else I should look at?
Almost a year ago and 13k miles, I cleaned out the intake passages, etc. the check engine light didn't come on until last month and of course it has to pass inspection before the end of October.
So, I tested the EGR valve and it wouldn't hold a vaccum, so I replaced it. That didn't solve the problem.
So, I decided to remove the manifold and try to clean it again.
After removing the upper intake manifold, the passages looked good. I ran a wire down the passage and it is clear and also sprayed cleaner through it and it flows freely.
Since it didn't look like clogged passage was the issue I looked at the following:
VSV - when 12v applied it is blocked, with 12v not applied, it's open, that includes getting air through the passage through the intake manifold
Temp Sensor - I'm getting .189 M-ohms at room temp (80ish degrees), if I heat it up, the resistance decreases.
After re-assembly, I'm still throwing the the same code.
(By the way, the idle is too high now, so I need to check for an unmetered air leak also)
Anything else I should look at?