EGR Systems
Chevy Astro
Toyota Supra

Idle on 1985 supra oscilates between 1100 and 2000 what can cause this?

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Wiki User
December 27, 2005 12:51PM

if it has a 22re engine, low coolant could be the culprit. a bad

head gasket (which actually also causes low coolant) could be the

problem too. This model year Supra came with a 5M-GE engine and the

idle hunt is most likely an air intake leak. check for air leaks

from the air filter box all the way to the throttle. you need to

check all the joints in that air duct. if air is getting pulled

into that duct, the map sensor info to the ecu will be wrong and

the computer will try to adjust the engine idle. found 5 holes in

my air duct and car wouldn't even idle till it was fixed

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