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might be your catalytic converter being plugged up. An exhaust leak, bad head gasket, cracked head, clogged air filter, low compression, timing off, bad spark plugs. The 2.5 is a high compression engine, not enough back pressure in the exhaust will cause a drop in performance, via low compression in the 2 middle cylinders. The cat going bad or getting clogged up will also cause black puffs out of the exhaust, when it is very bad the car will stall and you will have to hold the gas pedal down to get it started and at stops to keep it running.

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16y ago
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16y ago

My 95 Firebird lost almost all of it's power one day and took it to the shop, turns out my mass aif flow sensor was bad and i had vacuum hose leaks and one had actually collapsed. So it's possible your engine isn't getting the air it needs.

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Q: What could cause a 1995 Pontiac Firebird to lose power?
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