Electrical problem starting car
#1
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I'm having problems starting my 1994 mk1 mx5 1.8 after making a lot of changes to the car. The starter motor won't engage and when I turn the key to the 'off' position there are dashboard lights that turn on and solenoids clicking in the engine bay (even with the key removed from the barrel)
What is the most likely cause of this? I've changed so much on the car recently and not sure where to start. One thing to note is that the engine is sat inside the car with no gearbox attached (I'm doing the Kmiata BMW gearbox conversion). So the PPF is not connecting the front and rear of the car.
Other things I've changed:
Converted to LS2 Coils
Did VVT swap (new cam and crank sensor wired in)
I've checked the earth strap from behind the dipstick to the car body and that looks ok. There is another earth which would usually connect to the back of the inlet manifold, but I've attached it to the back of the head instead (inlet manifold is powdercoated).
There is another ground at the front of the engine underneath the throttlebody, which is also connected. Am I missing an earth? Does the PPF need to be attached for the starter motor to turn?
What is the most likely cause of this? I've changed so much on the car recently and not sure where to start. One thing to note is that the engine is sat inside the car with no gearbox attached (I'm doing the Kmiata BMW gearbox conversion). So the PPF is not connecting the front and rear of the car.
Other things I've changed:
Converted to LS2 Coils
Did VVT swap (new cam and crank sensor wired in)
I've checked the earth strap from behind the dipstick to the car body and that looks ok. There is another earth which would usually connect to the back of the inlet manifold, but I've attached it to the back of the head instead (inlet manifold is powdercoated).
There is another ground at the front of the engine underneath the throttlebody, which is also connected. Am I missing an earth? Does the PPF need to be attached for the starter motor to turn?
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#3
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I would remove the ignition switch and use a flat screwdriver to crank the engine and use a test light to verify proper wires are energized, just to make sure nothing went out of whack mechanically in the key barrel to switch connection.
Can you crank the engine by supplying 12v to the starter trigger terminal?
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brcpaige
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01-08-2020 12:29 AM