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Car wont start after headers and mounts =[

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Old 06-15-2007, 02:35 PM
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Default Car wont start after headers and mounts =[

I installed pacesetter LT with their y pipe, and prothane mounts. My car cranks but wont fire. I have brand new plugs with brand new MSD wires. The plug on the top of the alternator is plugged in, the hole ontop of the intake manifold is plugged. I cant figure out why it wont start. Coil pack plugs are connected, IAT is connected, MAF is connected. This is kinda frustrating. The rear o2's are not plugged in, but the front o2's are plugged in.
Old 06-15-2007, 02:38 PM
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Start by checking ALL your fuses. Did you disconnect the battery for the install?
Old 06-15-2007, 02:40 PM
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does it start then die or just not even try to at all?
Old 06-15-2007, 02:54 PM
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Originally Posted by scottHMT
I installed pacesetter LT with their y pipe, and prothane mounts. My car cranks but wont fire. I have brand new plugs with brand new MSD wires. The plug on the top of the alternator is plugged in, the hole ontop of the intake manifold is plugged. I cant figure out why it wont start. Coil pack plugs are connected, IAT is connected, MAF is connected. This is kinda frustrating. The rear o2's are not plugged in, but the front o2's are plugged in.
Check the ground behind the alternator that connects to the frame rail. I believe without that it wont start.
Old 06-15-2007, 03:06 PM
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Also check the crank position sensor(located behind the starter on the side of the engine). It will not run at all if you accidentally knocked it loose.
Old 06-15-2007, 03:38 PM
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Originally Posted by 5.3LJimmy
Also check the crank position sensor(located behind the starter on the side of the engine). It will not run at all if you accidentally knocked it loose.
Thats my guess.
Old 06-15-2007, 03:42 PM
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Yea there is either a sensor not plugged in or a ground that is loose
Old 06-15-2007, 07:47 PM
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i disconnected the battery for the install, the driver side ground is connected. It cranks but doesnt fire.
Old 06-16-2007, 10:40 AM
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Originally Posted by 5.3LJimmy
Also check the crank position sensor(located behind the starter on the side of the engine). It will not run at all if you accidentally knocked it loose.

exactly the problem, everything is great now. Im terrorizing the neighborhood open header. Thanks everyone.
Old 06-16-2007, 06:36 PM
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At least that is all you did. I accidently sucked a rag into the intake and bent valves and the car is still not running 3 weeks later.
Old 06-16-2007, 08:08 PM
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Originally Posted by mnypitZ
At least that is all you did. I accidently sucked a rag into the intake and bent valves and the car is still not running 3 weeks later.


I bet you had a funny look on your face right after you saw that rag disappear.




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