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92 legacy lack power hard start worse cold


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2 replies to this topic

#1 05mustang

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Posted 20 March 2005 - 09:15 PM

I have a 92 legacy wagon, it has almost no power and strugles to get to 3000 rpm, worse cold. it has 30-40 psi fuel pressure, spark plugs and fuel filter are
new. It has no codes. I disconnected the air flow senor and and it ran better. I replaced the maf with a new one from subaru. The car ran great for 4 days and
then started to run poorly again. I have also cleaned the fuel injectors with a professional injector cleaner kit. from 3000rpm up it seems to run normal.

Any help would be great.

#2 Legacy777

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Posted 21 March 2005 - 08:40 AM

Hmmm.

So it's worse when it's cold?

Might be the coolant temp sensor, but the symptoms your experiencing are pretty severe for the coolant temp sensor. It's a $20 item though, so it might be worth the money to eliminate it.

Have you tried running d-check mode? It's a more "active" diagnostic method. Instructions are on my site.

other possibility is that the ECU is not working properly.

#3 05mustang

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Posted 21 March 2005 - 11:57 AM

i have tried the active diag mode and it passes.




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