Sorry this isnt really related to the TBI other than that its on a TBI camaro, but the other message rooms suck !! heh anyways I have no heat... I did up until the other day when I turned the A/C on because it was hot out, ever since then... only cold air blows out even if its on all the way hot... what happened!!!!!

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89 RS 305 TBI
Edelbrock 14x3 OE intake, Hypertech Chip, Street & Strip shift kit, flowmaster exhaust w/ high flow catco cat.
AIM:TiMoThY9801
Stereo:

JVC Detachable face cd player w/ 2 Pioneer 12" subs in custom box, powered by Lanzar 600 watt amp.

 

The heater control valve might have stuck.

It gets vac. applied to it to close it when you switch to A/C. This helps keep the hot water out of the inside of the car and heater box, helping the air work better.

I would take the heater conrtol valve off and see if you can blow through it, maybe just put a connector to eliminate it for now and see if that works.

If not, you might have a cable/vac./door problem inside the car.

Do you ever throw pencils/pens on your dash??

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ASE Mechanic/Machinist/Smog Tech

1999 NBM Trans Am
1986 Chevy 3/4 ton pick up
1981 corvette
1995 Kawi ZX6R

GO #3

[This message has been edited by Engineboy (edited February 17, 2001).]

 

actually, vacuum OPENS the flow control valve. Mine had little "rocks" of congealed coolant in it, had to take it off and clean it out. such fun. I would start the car, turn the temp all the way up, and check for vacuum at the valve. If yes, then feel the hoses, if one is hot, and one is not, (by the heater core inlets) then the core may be clogged. If neither are hot, then the valve is not opening. Also, check your coolant level first, low coolant will also give you a no heat condition.