Question about 1995 Pontiac Firebird

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94 Firebird 3.4L starter and coil packs dontget power.

I rebuilt the engine but after placing it back into the car i cant get power to the starter nor the coil packs everything else has the proper voltage. all fuses are good. i can jump the starter and it will turn over but still no fire.has good fuel presure. i had the dash out of it but i dnt know if there could be somthing inperticular i may have left unhooked behind it that could caused it please help i am totally clueless.

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There are several issues that could be at work here but let's see if I can help provide a little information as I understand it for your model. Does the dash light up when you turn the key on? You don't indicate if the car has an automatic or manual transmission. Starting with the starter, you apparently have it properly wired including the main ground going to the cylinder block if you can get it to crank by shorting to the solenoid terminal on the starter. There is a yellow wire that comes off of the ignition switch and tees off and goes to a theft deterrent relay and also either a transmission range switch if you have an auto transmission or a clutch start switch if you have a manual. From either of the two switches the yellow wire (or could be brown at this point) then goes again to the theft deterrent relay. There is a purple wire that exits the relay and then goes to the solenoid terminal on the starter. Sorry, I don't know the location of the relay. If you can bypass the relay by connecting the yellow or brown wire to the purple wire and the vehicle then cranks by the ignition switch then the theft deterrent system is causing the problem.

The coil pack gets it's voltage from the #11 10 amp fuse in the under hood electrical center via a pink wire. That fuse will only have voltage when the key is in the on position. It also grounds at a connection with at least 5 other wires, on our 95 firebird it was on a thermostat housing bolt.

Just make sure you have all the ground wires connected and that all the connections are good. A simple test to check for a bad ground is to connect a test light to the ground terminal on the battery and touch the point of your test light to the engine or what ever component ground you want to test and try to power that circuit by either turning on the ignition switch or cranking the engine. If there is a bad ground, your test light will light up bright as it is trying to close the circuit instead of the proper ground path that it should be taking. This test will only be accurate though if you are using a common bulb type test light. Diode test lamps or other low impedence test lamps could give an innaccurate result.

Hope this helps. Just be carefull when shorting starters so you don't have any accidents.

Posted on Dec 23, 2008

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I rebuilt the engine but after placing it back into the car i cant get power to the starter nor the coil packs everything else has the proper voltage. all fuses are good. i can jump the starter and it will...


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