themysteryman83
06-26-2007, 08:26 AM
Recently my 98 Ti has been idling rather badly. 2 days later after it had started it threw the CEL. Had the codes read at autozone and of course a "parts specialist" told me that the problem was my o2 sensor.
I'm no fool, so upon further inspection I noticed a crack in the rubber boot between the throttle body and secondary throttle body (traction control). Promptly replaced that, but didn't scratch the issue.
Upon more inspection and in greater detail I noticed that the hose going from the valve cover to the crank case vent valve was just absolutely destroyed and barely hanging on! I have absolutely no idea how that happened. Anyway, picked up the part at my local dealer and replaced that. The problem went away and the CEL went off by itself!
2 days later the problem resurfaced. CEL back on again. I bought a code scanner and live data scanner off eBay and was able to read the codes and view the live data output by the ECU. Interesting data actually. One of the codes was the "alternative oxygen bank 1" or something to that effect. Usually the o2 sensor from what I read around the internet. I know that the o2 sensor can be thrown if there's something wrong with the emissions system. This is why I bought the live data scanner.
Through the scanner, o2 sensor number 1 (m44 engine has 2) showed a fluctuating voltage between .2 to .8 volts. Normal from what I read in the Bentley manual. The second o2 sensor read almost no volts. Now the first question: Is that correct?? :confused:
Another thing that I noticed was that the crank case valve has a very loud hissing noise to it. So loud that I can hear it over the rest of the engine. Also after I turn off the engine, sometimes this loud hissing noise continues for a good 5 seconds. When I was having no issues I don't remember it doing this.
Second question: What could be causing the issue? A bad CCVV? Maybe it's clogged? :eek:
Other codes: Multiple misfires in one or more cylinders, misfire in cylinder 1,2,3,4. Also, there was a code about something with the fuel injection system. I would assume all these stem from the same problem.
I'm no fool, so upon further inspection I noticed a crack in the rubber boot between the throttle body and secondary throttle body (traction control). Promptly replaced that, but didn't scratch the issue.
Upon more inspection and in greater detail I noticed that the hose going from the valve cover to the crank case vent valve was just absolutely destroyed and barely hanging on! I have absolutely no idea how that happened. Anyway, picked up the part at my local dealer and replaced that. The problem went away and the CEL went off by itself!
2 days later the problem resurfaced. CEL back on again. I bought a code scanner and live data scanner off eBay and was able to read the codes and view the live data output by the ECU. Interesting data actually. One of the codes was the "alternative oxygen bank 1" or something to that effect. Usually the o2 sensor from what I read around the internet. I know that the o2 sensor can be thrown if there's something wrong with the emissions system. This is why I bought the live data scanner.
Through the scanner, o2 sensor number 1 (m44 engine has 2) showed a fluctuating voltage between .2 to .8 volts. Normal from what I read in the Bentley manual. The second o2 sensor read almost no volts. Now the first question: Is that correct?? :confused:
Another thing that I noticed was that the crank case valve has a very loud hissing noise to it. So loud that I can hear it over the rest of the engine. Also after I turn off the engine, sometimes this loud hissing noise continues for a good 5 seconds. When I was having no issues I don't remember it doing this.
Second question: What could be causing the issue? A bad CCVV? Maybe it's clogged? :eek:
Other codes: Multiple misfires in one or more cylinders, misfire in cylinder 1,2,3,4. Also, there was a code about something with the fuel injection system. I would assume all these stem from the same problem.