Normally i don't use 'high' on my car. Cause well, there's the t-tops, and it doesn't get ungodly cold here (except for lately). Well last night, i turnt the heater on high, and i noticed not much air is being sent through the vents... The blower for it sounds like its pumping a good amount of air, but not much is comeing out of the vents...Sounds like a big ole' 15PSI blower under the hood but in the car it feels like its pushing 2 PSI worth... What is the problem?

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89 IROC-Z 350 TPI

-Flowmaster Catback
-Performance Resource Chip
-700R4 (Rebuilt) Too much done to actually list
-K&N Airfilters
-Ported Plenum
-2.77 Gears (not much to brag about but eh, its there)
-MSD 8.5 mm plug wires
-Problems every other day with the car (probably not a mod, but to me it sure makes a difference)

 

my 'guess' is faulty vacuum lines that all meet at the back of your heater control in the dash. They actuate the vents.

good luck
ODB

 

Thanks for the reply, hrm... Finally someone is on this board that's from my area..

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89 IROC-Z 350 TPI

-Flowmaster Catback
-Performance Resource Chip
-700R4 (Rebuilt) Too much done to actually list
-K&N Airfilters
-Ported Plenum
-2.77 Gears (not much to brag about but eh, its there)
-MSD 8.5 mm plug wires
-Problems every other day with the car (probably not a mod, but to me it sure makes a difference)