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#1
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air help
what could cause complete lack of air in the cabin of a 1987 420sel?
i changed the monovalve and even the old one looked decent....right now have some defrost and coming out of all vents i believe but i need some help so opinions please thank you lyle in austin |
#2
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Lots of things can can cause poor output of air. The blower motor bearings can get dry and stiff dragging the blower speed down considerably. The blower regulator can go bad not putting the juice to the blower motor. The pushbutton can get iffy not telling the regulator how much juice to put out. The vacuum system can have all sorts of problems too causing the airflow to not go where it's supposed to, giving the impression of poor blower output. What I'm getting at is that it will require a competent diagnosis to fix properly. There is no replace "x" because that is what usually goes bad. Start by checking the fuses, then check the voltage at the blower motor. Depending on what is found there will determine the course of further repair or diagnosis.
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90 300TE 4-M Turbo 103, T3/T04E 50 trim T04B cover .60 AR Stage 3 turbine .63 AR A2W I/C, 40 LB/HR MS2E, 60-2 Direct Coil Control 3" Exh, AEM W/B O2 Underdrive Alt. and P/S Pulleys, Vented Rear Discs, .034 Booster. 3.07 diffs 1st Gear Start 90 300CE 104.980 Milled & ported head, 10.3:1 compression 197° intake cam w/20° advancer Tuned CIS ECU 4° ignition advance PCS TCM2000, built 722.6 600W networked suction fan Sportline sway bars V8 rear subframe, Quaife ATB 3.06 diff |
#3
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Taking the year and model into consideration, I would suspect the vacuum actuators. Couple of them are easy to get to, a couple of them, not. You will want to check behind your glovebox....there are a couple of them there. Hope you have small hands.
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It is a truism that almost any sect, cult, or religion will legislate its creed into law if it acquires the political power to do so. Robert A. Heinlein 09 Jetta TDI 1985 300D |
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