Volvo 850 Made from 1993 to 1997, this Volvo line was available in both a wagon and a sedan, both with were graced with several trim levels.

I'M SO LOST! HELP!!

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Old 01-22-2006, 05:27 PM
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Default I'M SO LOST! HELP!!

Well, I took the valve cover off to check to see if the pistons/lifters were stuck and none of them were. I don't understand why my friggin' car won't start. Timing, spark, everything is checking out. I think that possibly the Knock Sensor and the Mass air flow sensor (computer says). If I replace these two sensors, what is the possibility that the car will start? Should I just sell the thing to a parts junk yard, or what?????
 
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Old 01-22-2006, 05:37 PM
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Default RE: I'M SO LOST! HELP!!

No idea what your odds are for replacing those sensors. Knock sensors are a pain because they're under the intake manifold. You have fuel pressure at the fuel rail, right?
 
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Old 01-22-2006, 06:10 PM
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Default RE: I'M SO LOST! HELP!!

Yes! I've got it all. It all comes back to those sensors. Does anyone know of any ideas for web sites where it shows the different engine parts. I need to know EXACTLY where and how to get to the knock sensor to check and/or replace it. Also, if anyone could run over the syptoms of a shot Mass air flow sensor, that would be great, too. Thanks!!
 
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Old 01-22-2006, 08:02 PM
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Default RE: I'M SO LOST! HELP!!

If you unplug the mass flow then it should start if it is bad.

I haven't ever seen knock sensors not let a car not start.

I would not worry about the knock sensors now. I would worry about the mass flow.
 
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