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Posted on Jan 02, 2017
SOURCE: 1990 buick lasabre with a
1. Monitor the 5v reference, Gray wire to the Throttle Position Sensor
(TPS) with a Digital Volt Ohm Meter (DVOM) set to the MIN/MAX setting.
2. Monitor the TPS signal circuit, Blue wire with a DVOM. Voltage should range smoothly from approximately 0.44 to 5.0 volts as the throttle is opened.
3. Tap test the Electronic Control Module (ECM) and see if the codes come back or if the engine reacts.
possible causes wiring or Powertrain Control Module (PCM)
Posted on Oct 31, 2010
Hi, you need to check if the gap between the sensor and the crank and cam. If the gap is to big you car will not have spark.
Posted on Jul 19, 2013
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