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Fuel econ. issue/EVAP code: Seeking opinions re shop's diagnosis. 850 1994

posted by  Mendelssohn on  Fri Aug 31 06:40 CST 2007
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last visit: Sun Mar 9 16:38 CST 2008
[RELATED]

I recently took my '94 854T to Fairfax Volvo (close to my office) to have them check it out. Fuel economy has averaged a dismal 23mpg in mixed driving for the last couple months. I was hoping you guys'd comment on what they told me needed fixing.

1. They pulled an evap code and reported that the evap valve is not responding. They want to change the valve ($200 for the part, extra for labor = $300+ total.)

2. They mentioned to me that the PCV system is clogged and requires an all-day repair. I have not noticed any loss of power or any other symptom that would suggest that something is wrong here, but the 'service adviser' made it sound rather dire--perhaps this is because fixing it would cost about $800?

I'm going to have the evap valve fixed. Is this something that I should expect will improve my fuel econ? Also, is the PCV problem just the mechanic messing with me, or is it common for a car with about 130k?

Warm regards,
Mendelssohn

'94 854T ~130k








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    Fuel econ. issue/EVAP code: Seeking opinions re shop's diagnosis. 850 1994

    posted by  KlausC on  Fri Aug 31 08:50 CST 2007
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    last visit: Fri Oct 24 10:15 CST 2014
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    It takes me longer to replace the purge valve: 10 minutes to find it, 10 minutes to study it, 5 minutes to replace it, and another 15 to admire my handy work :) And, no, it will not make a difference in mileage.

    The oil breather system advice is good and sound. At 130K, the oil separator is starting to get clogged and the hoses are getting old. Your car will feel much better with new parts. FCP sells various parts and/or kit to do this, but get your intake manifold from the dealer.
    Any good "mechanic" can do this in about 3 hours. It took me over 9 hours, but then there is a lot of "zen" time in my garage. I could probably do it in less than 5 hours the second time around. All you need is a nice torque wrench and a very good ratchet set. A pair of ramps to elevate the engine to woring height would be a plus - no need to get under the car.
    This would make a great difference in mpg and performance.

    Klaus
    --
    Please answer, we need to know if the advice is good or bad. The 164 has a new home, all I am left with are 2 turbos :)








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    Fuel econ. issue/EVAP code: Seeking opinions re shop's diagnosis. 850 1994

    posted by  nictalope on  Fri Aug 31 06:59 CST 2007
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    last visit: Tue Mar 11 21:19 CST 2014
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    Replace the part yourself for a cool $180 in savings, it takes 2 minutes to replace.
    http://www.eeuroparts.com/productdetail.aspx?code=7874







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