crank but no spark no start

Asked by s10needhelp Mar 01, 2016 at 02:23 AM about the 1999 Chevrolet S-10 LS Wide Stance Extended Cab 4WD

Question type: General

need help , I have a 99 S10 truck 4x4 with the 4.3 vortex engine. Had the
head and intake manifold gaskets changed. now there is no spark fuel
pressure good scan tool pushed out cod PO336 crankshaft sensor .
replaced crankshaft sensor and found a broken wire at the connector so i
replaced the connector. check the wires for power and ground good, but still
no spark at the coil. coil and ignition control module new.

1 Answer
225,335

Rowefast answered 9 years ago

Make sure there is 12V at the coil. This is on the po336....-P0336 CHEVROLET - Crankshaft Position Sensor 'A' Circuit Range/Performance.. Possible causes..- - Faulty crankshaft position sensor - Crankshaft position sensor harness is open or shorted - Crankshaft position sensor circuit poor electrical connection - Signal plate may be damage - Starter motor may be faulty - Starting system circuit - Dead or weak battery- The crankshaft position sensor (POS) signal is not detected by the Powertrain Control Module (PCM) during the first few seconds of engine cranking.. Possible symptoms... - Engine Light ON (or Service Engine Soon Warning Light) - Engine Cranks but Does Not Start - Lack/Loss of Power - Engine Stall

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