May 10, 2010 06:27PM
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Registered: 15 years ago
Posts: 636 |
I'm experiencing an idle when the engine is cold that is akin to have two spark plugs pulled. It's rough, and varies such that when the accelerator pedal is partially depressed, the car almost bucks.
It reminds me a bit of the time when I was a kid and while washing dad's car, decided to be extra helpful and wash his engine by taking a hose and spraying it for 5 minutes My immediate thought is that it feels electrical, except that it goes away as soon as the engine temp is past the blue mark. I've tested the coolant temp sensor and it is fine. So what else is temperature sensitive and could be causing that much engine choking? I always thought the temp sensor was the only thing... ----------------------------------------------------------------------------------- 1989 - E30 - M20 - Manual. Approximately 270,000 miles 2000 - E46 - M52TUB28 - Manual. Approximately 110,000 miles |
May 10, 2010 07:11PM
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Registered: 15 years ago
Posts: 183 |
May 10, 2010 07:18PM
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Registered: 15 years ago
Posts: 1,538 |
Have you tried pulling the Motronic codes to see what the issue is? |
May 10, 2010 07:30PM
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Registered: 15 years ago
Posts: 183 |
May 10, 2010 08:05PM
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Registered: 15 years ago
Posts: 636 |
Really? I was only aware of one... But I follow the Bentley, so I'm assuming that the one I know about, the one on the thermostat housing, is the one for the ECU. I didn't know the idle control valve had anything to do with temperature? And wouldn't the ICV become a non issue once the throttle is no longer closed? Moisture had occurred to me, but this has been happening on the last 6 or so starts over 3 days. 3 morning starts, 3 afternoon starts (when it was warm and sunny).
The only code is 1221 O2 Sensor out of whack. It comes on every so often for seemingly no reason. But only once every 4 or 5 driving hours, and never in the morning. I replaced the O2 sensor last month becomes it was being set off every 5 minutes, even though the engine was running better than it is now.
It is quite nice, if only for ease of mind. The Check engine light goes off, and it's helpful to be able to pull over, check and see that it's an O2 sensor code, and hop right back on the freeway without worrying that your engine will blow. However I often wish it gave MORE info ----------------------------------------------------------------------------------- 1989 - E30 - M20 - Manual. Approximately 270,000 miles 2000 - E46 - M52TUB28 - Manual. Approximately 110,000 miles |