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Why would Pontiac Firebird 3.4 liter only overheat driving on the highway?
Wiki User
∙ 18y ago
If this engine is in a firebird/trans am, one problem could be is the plastic air dam located behind the bumper and below the core support for radiator is either missing or damaged. most commonly broke off because of pulling too close to concrete parking stop,too low of a driveway or sidewalk in front of a business. no air is getting scooped up into radiator. Could be a blown head gasket. Losing any antifreeze??
Wiki User
∙ 18y ago
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Could be debris (leaves, rodent nests, etc.) blocking the air flow through the radiator.
Replaced thermostat and sensor and gauge on 1989 Chevy Celebrity will overheat when driving in city where it is stop and go but driving on highway it will be stay at normal. Why does it overheat?
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