What would cause a 1990 legacy to randomly die?

Asked by Dec 12, 2010 at 12:16 PM about the 1990 Subaru Legacy 4 Dr STD Wagon

Question type: Maintenance & Repair

i bought my 1990 legacy wagon for dirt cheap. I had serious motor problems for a while, it
wouldnt idle for a long time until it warmed up, and it had bad misses for a long time.  I used
seafoam through vacuum lines, poured some in tank. That helped some.  I also replaced the
TPS. Everything improved when i replaced the TPS. However if i leave the car sitting idling on
its own, it will randomly die after about 20 minutes.  I also tried leaving a heavy object on the
gas pedal so that it sat around 1500 rpm, and instead of dying when it normally did, the rpm
just dropped from 1500rpm to around 700rpm, and when i removed the object from the gas
pedal the motor instantly died.  Dont understand it.  any help appreciated.  thanks

4 Answers

5

your dead

improve credit score

35

Does your vehicle have a mass air sensor ? I would also look into a possible leaking vacuum line near your intake manifold?

55

try replacing your idle valve

Your Answer

Add photo

Related Questions

  • Subaru Legacy 2001 bad acceleration 38 answers

    Well i have subaru legacy 2001, My problem is when shift the 1 or 2 Gear and then press the accelerator the acceleration RPM slowly slowly increase when it reach to above 1500 RPM then take pickup f...

    2001 Subaru Legacy GT

    -

    Maintenance & Repair

  • '98 Legacy L Spitting and sputtering 6 answers

    I own a 98 Legacy L, 2.2L engine. i was driving recently and had the car start to spit and sputter no matter if i backed off the gas or pushed the peddle to the floor. I sucked down a quarter tank of ...

    1998 Subaru Legacy 4 Dr L AWD Wagon

    -

    Maintenance & Repair

  • Rodents eating electrical wiring 2 answers

    My Legacy is only 6 weeks old and rodents ate through the electrical wiring. Is this common with Subuaru?

    Subaru Legacy

    -

    Maintenance & Repair

  • Subaru legacy starts and dies 1 answer

    I have a 93 Subaru Legacy Sedan FWD with about 215K on it. It's worked will, had a few things replaced, but now it will start and then promptly die with a very loud crashing noise when it dies. I'm ...

    1993 Subaru Legacy 4 Dr L Sedan

    -

    Maintenance & Repair

  • Car randomly dies 1 answer

    My car will randomly (die) when I'm driving down the road..it doesn't completely die but will not let me go over 20 mph and when I pull over it shakes a little bit but then once I shut it off and ...

    Cadillac Escalade

    -

    Maintenance & Repair

Legacy

Looking for a Used Legacy in your area?

CarGurus has 15,900 nationwide Legacy listings starting at $999.

ZIP:

Search Subaru Legacy Questions

Subaru Legacy Experts

#1 Anthony_60
Anthony_60
Reputation 1,240
#2 Nick Eidemiller
Nick Eidemiller
Reputation 700
#3 dandyoun
dandyoun
Reputation 680
View All

Related Models For Sale

Used Honda Accord
821 Great Deals out of 85,700 listings starting at $988
Used Toyota Camry
1,015 Great Deals out of 90,766 listings starting at $650
Used Honda Civic
667 Great Deals out of 89,882 listings starting at $1,299
Used Toyota Corolla
765 Great Deals out of 73,024 listings starting at $1,962
Used BMW 3 Series
1,021 Great Deals out of 31,752 listings starting at $1,000

Used Cars For Sale

2017 Subaru Legacy For Sale
6 Great Deals out of 10,275 listings starting at $17,432
2016 Subaru Legacy For Sale
31 Great Deals out of 816 listings starting at $10,995
2015 Subaru Legacy For Sale
39 Great Deals out of 998 listings starting at $10,700
2014 Subaru Legacy For Sale
45 Great Deals out of 1,106 listings starting at $8,999

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.