93-02 V6 Tech V6 Camaro General Topics.

Are the fuel injectors on a 3.8L batch fire or sequential?

Old May 18, 2010 | 09:49 PM
  #1  
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Default Are the fuel injectors on a 3.8L batch fire or sequential?

Just resurfaced the heads and replaced the head gasket on my 96 3.8L camaro and now it wont start. With a hit of starter fluid, it starts then immediately dies, which says fuel. I have pressure at the rail and this car was running fine before this. All of my vacuum lines are back where they should be too.

Now, I just randomly hooked the fuel injector plugs back up, thinking it was like my 89 Iroc, which fires all injectors at once. Does it batch fire, or does it fire in sequence on the 3.8l?
 
Old May 18, 2010 | 10:02 PM
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im not sure, ill have to look into this. is it multiport fuel injection or direct port?
 
Old May 18, 2010 | 10:29 PM
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I'm not certain, but it's a function of the PCM...

Check out the attached image...
 
Attached Thumbnails Are the fuel injectors on a 3.8L batch fire or sequential?-96-camaro-3.8l-fuel-injector-control-circuit.jpg  

Last edited by libertyforall1776; May 18, 2010 at 10:34 PM.
Old May 18, 2010 | 10:40 PM
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You have sequential injection. However, wrong connection should not prevent the engine from starting. Get some NOID lights and verify that the PCM is firing the injectors. The PCM applies ground to complete the circuit. There are two injector power fuses, one per bank.
 
Old May 19, 2010 | 12:14 AM
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I went back out and looked and I have them hooked up right. I will check the fuses and make sure they are firing tomorrow. Thanks for the help and I will keep you posted.
 
Old May 19, 2010 | 09:36 PM
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I found the problem. My dad had pulled the fuel injector fuse when we were cranking it over to check for coolant leaks into the cylinders. However, I am about ready to drive this damn thing off a cliff since replacing the head gaskets didn't do anything. Still getting the cooling system pressurized.
 
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