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Missing 1990 Legacy

Tiny
WOLF
  • MEMBER
  • 1990 SUBARU
My 1990 legacy misses, I have improved this by using higher octane fuel but the problem still persists. I think the coil packs are failing, is there an additive/treatment I can use that might reduce this problem?
Friday, December 8th, 2006 AT 7:09 PM

2 Replies

Tiny
MIKE H R
  • MECHANIC
  • 3,094 POSTS
When does the engine miss? At idle speed or when driving? At idle speed it coould be spark plugs or wires a vacuum leak or incorrect timing.
If it does it while driving it could be the fuel filter spark plug gap, incorrect timing or a cracked coil.
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Monday, February 26th, 2007 AT 2:17 PM
Tiny
SCUBARU
  • MEMBER
  • 71 POSTS
The coil pack on a 90 legacy almost never fails.I would look at plugs and plug wires first. Second, If the vehicle has an auto trans.I would suspect injector failure The 90 to 91 legacy 2.2l( auto trans only) has a known injector issue. Not really sure if the later is a a good job to try your self though.
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Tuesday, February 27th, 2007 AT 2:36 PM

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