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How long since a tune-up? Are there any applicable trouble codes? Where applicable, make sure throttle linkage isn't holding the throttle open. Clean the throttle body and iac.
If you have a scanner that shows live engine data, you can look at idle and idle desired, If idle desired is close to normal, then the pcm knows the idle is too high and trying to compensate. In that case, check for stuck iac or vacuum leak. There could be other issues?
Toyota Camry running rich Questions & Answers - Fixya
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... running rich I have a 1991 Camry that is running rich. I just replaced the O2 sensor and a new cat, oil change, new spark plugs. The car wont pass smog. it is ...
Dirty throttle body
Electric throttle control actuator incorrectly adjusted/faulty/damaged
Air leak on Intake
Poor electrical connection to the Intake Air Control valve
The car will need to be scanned for trouble codes. Whatever codes come up will identify what part of the engine is faulty. These codes are not totally exact in pin pointing the problem. You can take the car to Auto Zone or Advance Auto and ask them to run a scan on the vehicle. Then you'll have the codes, but you'll need to go a garge to have the car fixed.
trouble is some cars have an idle control valve remove and clean it,others have it as part of the throttle body .in which case clean the throttle body with throttle cleaner.
The smoking is probably due to worn valve guides.. the oil from the top..the head.. is leaking past the valve stem into the cylinder.. next morning or a few hours later when you start the car.. it burns this oil up..and the problem although still there is much less noticeable.. cause the amount leaking is minute..it's being burned as you drive.. otherwise it takes a while for it to accumulate.. It could mean a minor head/top end rebuild to a minor overhaul..
The emissions problem and the idle problem may be linked.
First make sure your throttle cable is clean and working properly. They can get dirty.. sticky..or even a weak spring.. but dirt rust and grime..biggest culprits.
There is an IAC (Idle air control) valve attached to the throttle body.. you may be able to spray carb cleaner into the closed throttle body to clean it.. You may need to replace this part. It can really get clogged with carbon.. and cause this high idle problem.
Next.. replace or remove/clean/reinstall the EGR valve...probably better off just replacing it.
Check all vacuum lines for cracks..replace as needed..vacuum hose is cheap.. and lastly.. do a minor tune up.. plug wires.. plugs (properly gapped of course). air filter and fuel filter..
Your car will probably pass the smog check even with the cold startup burning oil issue.. that's not what's causing it to fail..it's the EGR valve and possilbe lack of recent tune up.
You can continue to add oil between changes.. use a heavier weight.. and check often.. Once consumption gets more than a quart or so between changes..you can contemplate the real fix... or start pouring anything with the word miracle into it.(grin).
After about 100K + miles the idle air control valve (IAC) begins to collect carbon deposits that interfere with the movement of the spring-loaded valve. You will not be able to clean this without removal and dissembly of the IAC body. Use an emory cloth or fine sandpaper to remove the build up around the valve. This should free it up to rotate without binding. This is a temporary fix, of course, and will either require cleaning again or replacement of the valve. Getting to the IAC requires removal of most of the intake upto, but not including, the intake manifold. Total time is approximately 3-4 hours, but worth it.
Good luck, and I hope this helps.
you may need replace the catalytic converter, but 1st do this, clean the throttle body and idle airbypass valve, change the oil before the retest as well, get it as hot as you can before the test, hold it at a high idle prior to the test, this may squeak you by, as a 20 year smog tech these are the thing I did, if all else fails do the cat conv.
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