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kwiggins29059, ASE Certified Technician
Category: Pontiac
Satisfied Customers: 2871
Experience:  ASE Certified Technician, Associates Degree in Automotive Technology, 15+ years in the trade
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Pontiac Firebird: Why won't my 1999 Firebird start and stay

Customer Question

Why won't my 1999 Firebird start and stay running? We have checked the fuel pump, changed fuel filter, tested the ohms in the chip key. the is fuel to the injectors but no pulse. help please.
Submitted: 1 year ago.
Category: Pontiac
Customer: replied 1 year ago.
I think it's the anti theft deterrent system, can we bypass it? how?
Expert:  kwiggins29059 replied 1 year ago.

Hello, it may be the key cylinder that reads the key pellet is bad. Since you have already ohmed the key buy a resistor of that value. You then want to find the two white wires that go to the key cylinder inside the column. Cut the two white wires and solder in the resistor.

If the key cylinder was the problem with the antitheft thiswill fixit for a few bucks vs buying the new key cylinder.

If this does not fix it the body control module will need to be replaced.

Customer: replied 1 year ago.
That didnt work. we purchased a bypass module but the wires at the pcm aren't the color that the instructions from the Haynes manual say they should be. Do you have a wiring diagram for the anti theft system for a 1999 Firebird. I haven't been able to locate one.
Expert:  kwiggins29059 replied 1 year ago.

Yep, this is for the 5.7 let me know if it helps

Customer: replied 1 year ago.
My car has the 3,8L v6 engine. not the 5.7. is the wiring diagram and schematics the same.? if mot then your help has been no help at all and I request all my money back.
Expert:  kwiggins29059 replied 1 year ago.

here is the diagram for the 3.8. Let me know if I can help further.

Customer: replied 1 year ago.
found out it was Mass air flow sensor needed replacing