dieseltech
15+ Year Contributor
- 191
- 8
- Aug 2, 2006
-
Essex,
Iowa
Looking at my ACdelco Starting and charging systems book, the wire you used seems to be adequate for the positive wire. You must remember that the path the electricty travels back to the battery is just as important.
In your basic circuit the only item that is used is voltage. For example when u have a light in a simple 12v circuit the light uses all of the voltage. It also has amperage flowing through it but remains constant in the circuit. In your case let's say your starter is demanding 300 amps. This demand is constant and does not change in the circuit. 300 amps leave the battery and 300 amps return, only voltage is used.
Your cranking speed is very slow and the starter is drawing ALOT of amperage. Unplug your mpi fuse. Crank on the engin for 15-20 seconds. Go back to the battery and very carefully touch the battery ends, or if you have the means use a thermal heat gun. I'm sure you will find the negative battery cable is very hot. You will find this also true with any ground that is connected from your engine block to the body.
The body makes a fine ground for low amperage circuits but high amperage circuits require a clear and free path to and from the source. I've solved many trailer related problems because people use the trailer ball as the ground!! Also grouning your battery to the body only can cause driveability issues. Give these suggestions a try and let me know what you come up with.
In your basic circuit the only item that is used is voltage. For example when u have a light in a simple 12v circuit the light uses all of the voltage. It also has amperage flowing through it but remains constant in the circuit. In your case let's say your starter is demanding 300 amps. This demand is constant and does not change in the circuit. 300 amps leave the battery and 300 amps return, only voltage is used.
Your cranking speed is very slow and the starter is drawing ALOT of amperage. Unplug your mpi fuse. Crank on the engin for 15-20 seconds. Go back to the battery and very carefully touch the battery ends, or if you have the means use a thermal heat gun. I'm sure you will find the negative battery cable is very hot. You will find this also true with any ground that is connected from your engine block to the body.
The body makes a fine ground for low amperage circuits but high amperage circuits require a clear and free path to and from the source. I've solved many trailer related problems because people use the trailer ball as the ground!! Also grouning your battery to the body only can cause driveability issues. Give these suggestions a try and let me know what you come up with.
Although I'm still getting the starter squeal.