overheats when a/c is on
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Joined: Jan 2003
Posts: 777
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From: NJ
Car: 1988 Trans Am
Engine: 305 TBI
Transmission: th700R4
next time you go out.. put the a/c on and see if the fan turns off... since you set the fan to stay on all the time... you may be cutting it off when the a/c goes on because the fan is susposed to come on when a/c goes on so maybe you created a cut off pint! it happend to me once
lol yeah i figured thats what was happening but nah, it stays running the whole time, maybe its cutting off at 22 instead of turning off....lmao, who knows....
i heard the fan has 2 speeds, , its supposed to kick into high speed when the a/c is on, this true?
i heard the fan has 2 speeds, , its supposed to kick into high speed when the a/c is on, this true?
i dont think the fan has a two speeds. but you may want to check infront of the condensor or inbetween it and the radiator, might be something blocking it making it difficult to get good enough air flow. how high does the temp get? is that duing traffic or highway?
nothing at all between the radiator and condensor, ive taken the radiator out several times lol.
it gets damn near 260 degrees. and itll do it on the highway....but will only do it when the a/c is on.
weird huh.
radiator is new, ..no bent fins, completly clean inside the radiator, ive flushed it 3 times now.
i dunno wtf its doing it.
maybe my guage is off, which sensor send the signal to the guage??
the one on the drivers side head??
it gets damn near 260 degrees. and itll do it on the highway....but will only do it when the a/c is on.
weird huh.
radiator is new, ..no bent fins, completly clean inside the radiator, ive flushed it 3 times now.
i dunno wtf its doing it.
maybe my guage is off, which sensor send the signal to the guage??
the one on the drivers side head??
Last edited by SlowMaro; Jun 26, 2003 at 12:15 PM.
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funny thing, mine did to until i rigged the fan to come on when the key is turned.
runs cool as hell all day til i flip the a/c on
now when my a/c is on and i cut my car off, the a/c will stay running and i have to flip it off......wtf????
runs cool as hell all day til i flip the a/c on
now when my a/c is on and i cut my car off, the a/c will stay running and i have to flip it off......wtf????
Originally posted by SlowMaro
you talking about the grill / thing thats in the fog light comparment that looks liek wanna be ram air, right?
you talking about the grill / thing thats in the fog light comparment that looks liek wanna be ram air, right?
Edit: The one underneath this post, lol.
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Joined: Jan 2002
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From: Kingsport, TN
Car: '92 RS, '84 Z28
Engine: 383, L69
Transmission: T56, 700R4
Axle/Gears: 3.42, 3.42
the part underneath the car. this is ******* car, its the black peice. it help air go up to the radiator while driving
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Joined: Jun 2002
Posts: 391
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From: Sacramento,Ca.
Car: 90 Formula
Engine: 355 C.I.
Transmission: 5 Speed
Axle/Gears: 3.42
Im thinking you have a bad radiator. Fans never shut off because the temp starts backing up. With the A/C on it continues the overheat. If the Radiators good, Its very possible that the fans come on and cool the engine down better.
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