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Wiring looks fine, tried stock HFM, still no luck. (archive)

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Posted by Jim//M3 on January 28, 2001 at 16:03:24:

In Reply to: That could be 1 but ..More posted by BLOWN///M COMPACT..NY.NY on January 29, 2001 at 10:57:17:

Even tried disconnecting the O2 sensor, and nothing. I did notice some oil inside the throttle body.



I had same problem and it was the HFM . When they extented the wire for the supercharger install I ran into a problem with the HFM being the same deal as you . Oil I guess hit the HFM sensor and burnt it out . I got a new one and it worked ( I think you can check it by installing your stock air mass for a minute but dont take my word for it) Then after installing the new one I pulled the extended wires for the connector for the HFM and 1 puped out . Then I had the same problem again . I fixed the wire and I was good to go
I just got finished re-installing my supercharger after having it rebuilt. I double checked all the vacuum line connections and everything looks fine. But when I start the car, it will idle for about 3 seconds, stumble, then dies. I keep trying to start it and it keeps dying. Even if i try to hold the rpms at around 3000, it'll still eventually die.

One guess would be that before I had the s/c rebuilt it was blowing some oil (because of a bad seal) through the throttle body into the intake. Would this extra oil going through the engine this way foul up the O2 sensor?? The reason I say this is that right before I pulled the s/c, I got 2 engine codes that read: knock sensor cyls 1-3 and lambda control #1, which I understand are most likely O2 sensor related.

The car showed no more codes after I kept trying to start it.

Any help is appreciated.






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