Injector Ballast Resistors
#1
Burning Brakes
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Injector Ballast Resistors
Hi All,
I have a 944S (the 16V one) that wont power the fuel injectors. It was a swap into an early 944 and somewhere along the way the ballast resistors, bracket, and plug werent swapped as well, so now the car wont start. It seems to have a cycling .4 volts between the injector and ground, but it should have 12V cycling. The 5-pin plug on the harness is there for the ballast resistors, but there are no ballast resistors plugged in (its just an empty plug!)
Has anyone made their own set of ballast resistors?
Are they the same on the turbo so I could buy it from someone?
Have I already fried my computer just by trying to crank the darn thing and not knowing it was missing the ballast?
The injectors on this car are 3 ohm- the ballast 6 ohm.
I have a 944S (the 16V one) that wont power the fuel injectors. It was a swap into an early 944 and somewhere along the way the ballast resistors, bracket, and plug werent swapped as well, so now the car wont start. It seems to have a cycling .4 volts between the injector and ground, but it should have 12V cycling. The 5-pin plug on the harness is there for the ballast resistors, but there are no ballast resistors plugged in (its just an empty plug!)
Has anyone made their own set of ballast resistors?
Are they the same on the turbo so I could buy it from someone?
Have I already fried my computer just by trying to crank the darn thing and not knowing it was missing the ballast?
The injectors on this car are 3 ohm- the ballast 6 ohm.
#3
Burning Brakes
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Yep a nifty 5 pin one that looks like a diagnostic port kind of plug, which Id be more than happy to chop off and replace with a molex, if I could just find the 6ohm resistors and how to wire them in!
So putting in ballast resistors is an aftermarket mod for the turbo guys so you can run (bigger) injectors? Does anyone have a "how to" on that? Or a wiring diagram of what they did?
So putting in ballast resistors is an aftermarket mod for the turbo guys so you can run (bigger) injectors? Does anyone have a "how to" on that? Or a wiring diagram of what they did?
#6
Yep a nifty 5 pin one that looks like a diagnostic port kind of plug, which Id be more than happy to chop off and replace with a molex, if I could just find the 6ohm resistors and how to wire them in!
So putting in ballast resistors is an aftermarket mod for the turbo guys so you can run (bigger) injectors? Does anyone have a "how to" on that? Or a wiring diagram of what they did?
So putting in ballast resistors is an aftermarket mod for the turbo guys so you can run (bigger) injectors? Does anyone have a "how to" on that? Or a wiring diagram of what they did?
For a turbo setup, You put a 1 ohm, 25 watt resistor on each of the DME wires 14 and 15 that go to the injectors. The two wires are going from the same transistor inside the DME so they are in parallel. This is done when going to bigger aftermarket injectors that have a lower on resistance then the stock units.
Last edited by Bri Bro; 11-16-2009 at 01:44 AM.
#7
Yep a nifty 5 pin one that looks like a diagnostic port kind of plug, which Id be more than happy to chop off and replace with a molex, if I could just find the 6ohm resistors and how to wire them in!
So putting in ballast resistors is an aftermarket mod for the turbo guys so you can run (bigger) injectors? Does anyone have a "how to" on that? Or a wiring diagram of what they did?
So putting in ballast resistors is an aftermarket mod for the turbo guys so you can run (bigger) injectors? Does anyone have a "how to" on that? Or a wiring diagram of what they did?