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Old 02-10-2010, 07:08 PM   #1
86GTPONY
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Dead spot on the throttle

Ok - on my 87 turbo coupe I have a dead spot on the throttle. When I rev it up, it goes from 1200 to 2000 rpm. I can't get it anywhere in between. I checked the throttle positioning sensor (tps) and the voltage increases as it's supposed to... So, I'm kinda stumped.
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Old 02-10-2010, 07:38 PM   #2
93cobra1928
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If you check resistance instead of voltage (with it disconnected) you will see the dead spot . Definately the TPS
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Old 02-10-2010, 07:51 PM   #3
EHardy1971
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Quote:
Originally Posted by 93cobra1928 View Post
If you check resistance instead of voltage (with it disconnected) you will see the dead spot . Definately the TPS
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Old 02-10-2010, 08:16 PM   #4
86GTPONY
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Huh... never tried that before. Makes sense. I'll try that this weekend. Thanks!!!
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Old 02-11-2010, 04:44 AM   #5
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I can't think of the name of it now but the Box before the turbo will cause this also. VAM. You can pop the top off of it and clean it with a scotch pad. The tps is much easier to check so start there first! I'm sure I have an extra one in the shop if you find a problem. A few years ago the VAM was $100 with a core at the zone.
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Old 02-11-2010, 06:15 AM   #6
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Quote:
Originally Posted by SvoBrown View Post
I can't think of the name of it now but the Box before the turbo will cause this also. VAM. You can pop the top off of it and clean it with a scotch pad. The tps is much easier to check so start there first! I'm sure I have an extra one in the shop if you find a problem. A few years ago the VAM was $100 with a core at the zone.
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