no spark why?
car was running , died suddenly
have 12 volts to igniter, coils have resistance of .2 ohms crank angle indicator has 150 ohms fuel pump works on starting ignition switch checked out 15 amp fuses good under drivers dash engine fuses like egi good But no spark |
Check the Brown/White wire of the TPS w/key to on as it should read 5 volts. If it is close to 0 volts then there is a short in the system (likely the AFM).
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thanks satch
i found 10.5 volts on the brown and white (from wire to ground) Do think it might be the ecu ? |
Originally Posted by Simpson
(Post 12118235)
thanks satch
i found 10.5 volts on the brown and white (from wire to ground) Do think it might be the ecu ? |
At the pressure switch the brn/w wire had the 10.5 volts . And the black had 8 volts. so I would say there is definitely some voltage shorting into the black.
the wire harness has had a lot of patch work done in the past (.seven blue crimp connectors.) I will investigate further . I am going to do a motor swap soon , might get a better inspection of the wire harness when the motor is out. thank you for the insight Simpson |
Originally Posted by Simpson
(Post 12119096)
At the pressure switch the brn/w wire had the 10.5 volts . And the black had 8 volts. so I would say there is definitely some voltage shorting into the black.
the wire harness has had a lot of patch work done in the past (.seven blue crimp connectors.) I will investigate further . I am going to do a motor swap soon , might get a better inspection of the wire harness when the motor is out. thank you for the insight Simpson |
you could also "as a test", install a second or redundant ground to your sensor ground circuit, As a temporary test/fix to see if your headed in the right direction.
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spark is back
I did a motor swap and after fixing up wire harness. and finding a loose connection to air flow meter. the spark is back thanks to all for help |
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