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90 camaro wont start 3.1 v6

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Old Jun 10, 2014 | 06:00 PM
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90 camaro wont start 3.1 v6

just got the car cheap. Was told that it had a new fuel pump, fuel pump relay, ecm, timing chain, and more. fuel rail and plenum were already removed so first thing i did was check the pulse on injectors drivers side bank wouldnt pulse, but the passenger side would. so i checked the ohms on all injectors a couple read low on driver side so i replaced and tested pulse again had the same problem. so i figured maybe electrical so i started testing the harness for voltage and shorts nothing conclusive so reattached everything and still the same problem. was told it would run off ether but haven't seen for myself seeing how the plenum and fuel rail were already removed when i got the car...and they lost all bolts any ideas on what could be the problem with the driver side bank injectors??

Last edited by heavychevy71; Jun 10, 2014 at 06:55 PM.
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Old Jun 10, 2014 | 06:08 PM
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Re: 90 camaro wont start 3.1 v6

i have been thinking about changing the icm from different forums but never would have thought that it had anything to do with fuel injection
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Old Jun 10, 2014 | 07:29 PM
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Re: 90 camaro wont start 3.1 v6

any thoughts at all??????
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Old Jun 10, 2014 | 07:34 PM
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Re: 90 camaro wont start 3.1 v6

Originally Posted by heavychevy71
any thoughts at all??????
Yea , I got one .....

If it will pulse the injectors on one side , but not the other , the first thing to check are the fuses "INJ1" and "INJ2" in the fusebox under the dash next to the steering column . A shorted injector likely took out one of em .....
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Old Jun 10, 2014 | 07:48 PM
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Re: 90 camaro wont start 3.1 v6

Had just checked them right before your reply and someone had a wire for an amp wrapped around one don't know if that was the problem but removed wire and replaced fuse with radio fuse don't need that right now and all injectors pulsing now.. Now just to put it back together and see what happens... Thanks for your reply will post update when put back together if I have any other issues... Gotta get some bolts for the fuel rail now since whoever took it apart lost all the bolts to everything
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Old Jun 11, 2014 | 10:31 AM
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From: Georgetown TX
Car: Base 91 'bird
Engine: 3.1 v6
Transmission: 4L60
Axle/Gears: 9-bolt 3.27 & PBR
Re: 90 camaro wont start 3.1 v6

You shouldn't have replaced just one or two injectors. It would have been better to get a set (Southbay has a good deal for TGO members). That way you know you have a good starting point and wouldn't have to remove the top again. Don't forget to check the fule pressure regulator at some point.
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Old Jun 14, 2014 | 03:44 PM
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Re: 90 camaro wont start 3.1 v6

Can you bypass the smog pump mines locked up and don't wanna replace
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Old Jun 24, 2014 | 07:17 PM
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Car: 91 thirdgen camaro RS
Engine: 3.1 litre v6
Re: 90 camaro wont start 3.1 v6

Mine wich is a 91 camaro rs 3.1 v6 jus shut down on me the other day n won't start back up I cnt get the fuel pump to kick on wich I replaced
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