'89 Carerra 3.2 stalls when engine oil cap is removed
07-21-2011, 02:48 AM
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'89 Carerra 3.2 stalls when engine oil cap is removed
I just bought a Carerra 3.2 and tried doing my first engine oil top up. As this is an air cooled (dry sump), my understanding is that you will need to first run the engine till it is warm and upon coming to a stop, whist engine is idiling, remove the engine oil cap and check the oil level using the dip stick. Unfortunately, upon removing the engine oil cap (located right side of the rear engine bay), the car starts to "rattle" and eventually stalls. Has any one with similar experience, cause and the remedy?
07-21-2011, 03:21 AM
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There is a hose right under the oil tank cap. This hose has a brass cone inside it that restricts airflow to the engine when the cap is removed. Yours might be missing. You might check it.
Your engine may also have a number of vacuum (false air) leaks, which is common. The additional vacuum leak introduced by removing the oil tank cap is obviously putting the mixture outside the engone management system's ability to adjust.
Another possibility is that the O2 sensor is bad, or missing, or has a broken wire. But I haven't seen that result in a lean mixture, usually rich.
Your engine may also have a number of vacuum (false air) leaks, which is common. The additional vacuum leak introduced by removing the oil tank cap is obviously putting the mixture outside the engone management system's ability to adjust.
Another possibility is that the O2 sensor is bad, or missing, or has a broken wire. But I haven't seen that result in a lean mixture, usually rich.
07-21-2011, 11:33 AM
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Location: Manhattan Beach, California. Retired Engineer 1986 Targa-Factory Delivery Original Owner
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I just bought a Carerra 3.2 and tried doing my first engine oil top up. As this is an air cooled (dry sump), my understanding is that you will need to first run the engine till it is warm and upon coming to a stop, whist engine is idiling, remove the engine oil cap and check the oil level using the dip stick. Unfortunately, upon removing the engine oil cap (located right side of the rear engine bay), the car starts to "rattle" and eventually stalls. Has any one with similar experience, cause and the remedy?
There is a "check" valve, also know as a PCV valve next to the oil fill tube.
The purpose of the valve is to maintain vaccum during oil level checks and, top-offs.
Try replacing this component.
Good luck,
Gerry
Last edited by 1986 Targa; 07-21-2011 at 07:17 PM.
07-21-2011, 01:18 PM
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07-21-2011, 06:32 PM
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Yes,..,..well done!
I swear I remember that piece to be elsewhere....My Wrench did get that piece showed in Pic #1 changed out due to rubber cracking,..I had a helluva time finding that piece and gave up,..let him handle it long time ago).
I remember changing out many of the hoses within the car when I first got her. Luckily my son-in-law Toyota Master Tech was there during my work session,.....as I grabbed the (another) new hose to install it, he picked up the old hose to inspect the rubber's cracking, etc. and noticed this device within a hose...glad he caught it, as I learned quickly why it was there...no harm done.....I just don't remember it being where the pics ACTUALLY show!!!! Geeze,..I'm getting old, I guess.
Good stuff Rusnak...
BEST!
Doyle
I swear I remember that piece to be elsewhere....My Wrench did get that piece showed in Pic #1 changed out due to rubber cracking,..I had a helluva time finding that piece and gave up,..let him handle it long time ago).
I remember changing out many of the hoses within the car when I first got her. Luckily my son-in-law Toyota Master Tech was there during my work session,.....as I grabbed the (another) new hose to install it, he picked up the old hose to inspect the rubber's cracking, etc. and noticed this device within a hose...glad he caught it, as I learned quickly why it was there...no harm done.....I just don't remember it being where the pics ACTUALLY show!!!! Geeze,..I'm getting old, I guess.
Good stuff Rusnak...
BEST!
Doyle
