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Camaro 305 tbi to 350 tpi engine electrical problem (wont start)

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Old Oct 14, 2019 | 12:00 PM
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Camaro 305 tbi to 350 tpi engine electrical problem (wont start)

Hi guys.

I have a camaro 91 that had a 305 tbi and now have a 350 tpi and 7730 ecm (vats is disconnected) with a firebird engine harness. Security light goes and and off after a few seconds. The problem i sthat it cranks but wont start. The fuel pump doesnt engage with the ignition and the check engine light wont go on either. I checked the power cable and ground to the ecm and it is there anyway. I have also tested the fuel pump directly to a battery and it works and well. What am i missing?

Thanks in advance

Last edited by evo-offer; Oct 14, 2019 at 12:04 PM.
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Old Oct 14, 2019 | 02:10 PM
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Re: Camaro 305 tbi to 350 tpi engine electrical problem (wont start)




And if anyone knows what the big connector that is unplugged and the small tall one to the right does?
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Old Oct 14, 2019 | 03:02 PM
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Re: Camaro 305 tbi to 350 tpi engine electrical problem (wont start)

Wrong post
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Old Oct 21, 2019 | 07:38 AM
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Car: 1991 base firebird
Engine: tbi 305
Transmission: 700r4
Re: Camaro 305 tbi to 350 tpi engine electrical problem (wont start)

get it started ?
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Old Oct 21, 2019 | 07:48 AM
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Re: Camaro 305 tbi to 350 tpi engine electrical problem (wont start)

Originally Posted by Evilokc
get it started ?

Everything works now except that it doesnt seems to get fuel in the the cylinders. There is fuel in the fuelrail and i have a spark
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Old Oct 21, 2019 | 05:45 PM
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Car: 1991 base firebird
Engine: tbi 305
Transmission: 700r4
Re: Camaro 305 tbi to 350 tpi engine electrical problem (wont start)

is it trying to fire? you double check firing order? make sure plug wires aren't crossed somewhere? timing 180 out?

Last edited by Evilokc; Oct 21, 2019 at 07:45 PM.
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Old Oct 26, 2019 | 12:34 PM
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Re: Camaro 305 tbi to 350 tpi engine electrical problem (wont start)

did you trace those unconnected wires. from a quick glance at your pics, that disconnected connector looks to me like it might be to an individual fuse holder, ie the connector holds a blade type fuse and may be why you are not getting power to the injectors. i would ring out the connection and see where the orange wire goes to. look at the schematic and you should be able to quickly narrow it down
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