I recently Replaced the Engine on a 97 Chevy PU I was getting it to
turn over but not crank, I checked the grounds and I was getting
current to them. Upon disconnecting a ground from the block I got the
other wires to ground. but I am still getting current to that one ground.
Please Help could this be causing it to not crank In addition I have
already replaced the module, and several other ignition part am,
breaking my head about this one. I have also checked another Truck Same Make and model and this wire seems to belong grounded to the block. Please Help
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Re: Why do I keep getting current to this
Check to see if you are getting fuel and fire if you are getting fuel ,plug a spark plug put wire on it lay close to metal on engine check for spark, dont get near gas, cause a fire, if you are getting fuel and fire should crank,hope to help you,robert b.
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You need a new battery-
It takes a great deal more power to crank a motor than it does to light up the lights. This is why your lights still come on even though the battery does not have enough power crank the engine over. If you install a new battery keep an eye on it...if it dies quickly then you have a bad alternator.
Sounds like a loose connection, Clean the fuse contacts. Sometimes lubricant and dirt gets on the contacts within the switch itself and this will interfere with power supply. Have you checked the wiper relay corrosion and wear on the relay contacts impair electrical connection. Brighten up contacts with fine sand paper and if the relay contacts are suspect, remove the cover and draw folded sand paper between the contacts until clean.
When the ignition switch is turned on the pcm turns on the fuel pump by energizing the fuel pump relay. The PCM keeps the fuel pump on as long as the engine is cranking over or running.It does this by recieving pulses from the ignition module. If there are no referance pulses the PCM will turn the fuel pump relay off in 2 seconds with the ingnition on.
Most models also include a secondary control path through the oil presure switch witch will turn the fuel pump on after it detects oil presure.cranking time will be longer if the fuel pump doesn't recieve current until oil presure switch contact is closed.
YOU NEED TO CHECK DARK GREEN/ORANGE WIRE AT IGNITION COIL WHEN CRANKING ENGINE FOR POWER..IF NO POWER,SHUTDOWN RELAY IS NOT BEING ENERGIZED..THIS ENGINE ALSO HAS CAMSHAFT POSITION SENSOR ON END OF CYLINDER HEAD..ENGINE CONTROLLER NEEDS CAM AND CRANK SIGNALS TO ENERGIZE THE SHUTDOWN RELAY..UNPLUG CRANK SENSOR AND CHECK VOLTAGE ON ORANGE WIRE..SHOULD HAVE APPROX 8V..IF NOT..UNPLUG CAM SENSOR AND SEE IF 8V SUPPLY RETURNS..IF NO POWER TRY UNPLUGGING VEHICLE SPEED SENSOR LOCATED IN TRANS HOUSING WHERE RIGHT SIDE AXLE COMES OUT OF TRANS..IF 8V RETURNS..THE SPEED SENSOR IS SHORTED INTERNALLY..THESE 3 SENSORS SHARE THE SAME 8V SUPPLY CIRCUIT..WITH SPEED SENSOR UNPLUGGED,PLUG CRANK SENSOR BACK IN AND TRY TO START ENGINE..HAVE SEEN THIS SAME PROBLEM AT WORK RECENTLY