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Join Date: Dec 2013
Location: Spring Hill, Florida
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TPS Sensor

Trying to track down my intermittent accell problem. Engine idles good,starts good. Fuel mixture good. But from time to time, accelerating from a low rpm, it will just not rev up like the engine does not know the throttle is opening. Could their be a bad spot on the TPS sensor?

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3.3 ltr, stock compression, efi, twin turbo - no intercooler.
Old 12-08-2016, 04:51 AM
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Join Date: Dec 2008
Location: Austin, TX
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What car? Vacuum leaks will exhibit this running condition.
Old 12-08-2016, 05:36 AM
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KTL KTL is offline
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Join Date: Sep 2000
Location: Frankfort IL USA
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Are we talking about a 3.2 Motronic/Carrera engine? Could be the TPS which you can check for function with a multimeter for it's resistance values throughout the travel range.

Also could be a faulty airflow meter. The airflow meter has a wiper arm that pivots and tracks on electrical contacts inside the unit. Over time that contact gets worn and can create a driveability issue.
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Kevin L
'86 Carrera "Larry"
Old 12-08-2016, 10:01 AM
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the tps is only a switch on a carrera. turns off the AC when at full throttle. Your AFM is likely not working. this would be a good time to make the MAF mod and get some more horsepower.

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Old 12-09-2016, 04:29 AM
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