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Burnt plastic smell 1987 911 3.2
Hey everyone,
Was out for a drive today and noticed a burnt plastic smell for a few moments right after I turned the heater control dial to "2" and the blower fan (I think) to the right. The top right lever. I've put an arrow pointing to it in the pictures attached. They're the only things I touched. I'm pretty sure they're both on fused lines? Any ideas? Got me stumped. Not sure where to start checking, or if it was maybe just a coincidence and it came from outside the car on the highway.  
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11-09-2024, 08:08 PM
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PCA Member since 1988
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Most or all of the lights behind the dash are not fused. I think that includes the light for the heater controls. That's what I would look for first. And no matter what you find, install a fuse to the dash light circuit.
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1973.5 911T with RoW 1980 SC CIS stroked to 3.2, 10:1 Mahle Sport p/c's, TBC exhaust ports, M1 cams, SSI's. RSR bushings & adj spring plates, Koni Sports, 21/26mm T-bars, stock swaybars, 16x7 Fuchs w Michelin Pilot Sport A/S 3+, 205/55-16 at all 4 corners. Cars are for driving. If you want art, get something you can hang on the wall! |
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11-09-2024, 10:50 PM
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11-09-2024, 11:26 PM
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The top right lever you are pointing in your first pic controls the fresh air blower, which is known to fail and seize when old. This might be your burnt plastic smell source. You should clearly hear it run when the lever is fully pushed to the right and ignition is on (but engine off so you can listen to it). If you don't hear anything the blower is probably shot or its fuse has tripped.
Also, it is run and managed separately from the heater. Different units powered from different lines and fuses.
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Gilles RoW 88 Carrera coupé |
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11-10-2024, 09:05 AM
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Thanks for the reply. The blower still runs. So I don't believe it's that?
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11-11-2024, 03:49 PM
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PCA Member since 1988
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Distinguish smell--burnt plastic is very different from burnt vinyl (wire insulation). Which is it?
Burnt nylon has a different smell too. Think about burning nylon cord or rope ends (to keep them from unraveling).
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1973.5 911T with RoW 1980 SC CIS stroked to 3.2, 10:1 Mahle Sport p/c's, TBC exhaust ports, M1 cams, SSI's. RSR bushings & adj spring plates, Koni Sports, 21/26mm T-bars, stock swaybars, 16x7 Fuchs w Michelin Pilot Sport A/S 3+, 205/55-16 at all 4 corners. Cars are for driving. If you want art, get something you can hang on the wall! |
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11-12-2024, 11:45 AM
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Join Date: May 2015
Location: San Francisco & San Diego CA
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Frank Amoroso 911 M491 / M470 coupes: 1987 GP Wht / Blk "Apollo" 1987 Gemini Blue / Blk "Gemini" 1989 GP Wht / Blk "Vents" |
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11-17-2024, 04:10 PM
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88 Carrera coupé
