ok guys i have another question on the ecotec swap in progress. I have a 96 sunfire gt that im currently doing an ecotec swap. Now this car is not going to be a street car its strickly a drag setup. Im going to try go get away with just doing the motor side of the harness and just cut and paste on the interior side of it. Once again im not worried about my internal gauges and ac or heating. So heres my question was GM Passlock standard on all cavaliers from 03-05 or is it just an option. From what i read all it does is kill the fuel pump, so i could just run a manual switch to power it on right? I have a 04 engine would a 03-05 pcm work and which year pcm is best. Thanks
Alex
It kills the injectors too... so you'd need to get the Passlock working long enough to send the right fuel password to the PCM... then when it's going, you can worry about disabling it.
I don't know if you can run the 00+ pcms without also swapping in the 00+ bcm and cluster.... like I had to do to my 99 when I swapped everything to a 2000 to run the GM S/C.
Passlock was designed so gm cars would be hard to steal. They cut the injectors back so the engine wont run. The computer stores whats known as an R-code. Its basically a resistance in the key cylinder. When the tumblers in the cylinder make certain contacts it forms a resistance on the wires coming from the module on the column. In order to bypass that DEI has designed a bypass module. Its called a 555L. you would need to have some kind of trigger when you start the car for it to work. The module learns the r-code and allows the vehicle to be started. The module was designed to be used for remote start systems but im sure you can use it in this instance. The only other way to bypass it is to meter the resistance the yellow 22 ga. wire coming out of the passlock harness on the ignition cylinder and put a resistor in it. I DO NOT ADVISE OF THIS METHOD. It is not stable because resistors have a tolerance and that can always change. 95-99 cavaliers had passlock 1. 00-05 cavaliers have passlock2. All cavaliers 95 and up have passlock.
01' Z24 5 speed
422whp/400wtq
T4 Turbocharged
Built LD9
HP Tuners
bottom line... regardless of how you bypass it... you have to get it working properly first, to bypass it. there isn't a way around that.... unless you can fool it somehow.
Good luck!!! You're going to need it.
hy not get the interior harness and wirering and call it a day? no pissin arund just strip and install.prolly only about a days work..phil
Thanks guys for your help. I did some research and it looks like all the passlock does only kill power to the fuel pump. Because with a passlock error a car will start run for a few seconds and then die, so that tells me that the injectors were firing but just ran out of fuel. but anyways wish me luck and ill let you know if i successfuly bypass it.
Project Ecofire wrote:Thanks guys for your help. I did some research and it looks like all the passlock does only kill power to the fuel pump. Because with a passlock error a car will start run for a few seconds and then die, so that tells me that the injectors were firing but just ran out of fuel. but anyways wish me luck and ill let you know if i successfuly bypass it.
So because a car fires and shuts off it has to be the fuel pump?? I think going the route you are talking about will cause you more problems than it is worth. I would also swap the interior wiring as well (it is not hard), get the car working and start getting rid of what you do not need. If you swap everything a 00+ inside wiring does not require the gauge cluster to run the car, so you can take it out and add whatever gauges you want. The info that has been posted is very good info you should use it.
FU Tuning
