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No start after engine swap

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Old Jul 20, 2019 | 03:41 PM
  #51  
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Car: 1991 camaro z28
Engine: SBC 355
Transmission: 700R4
Axle/Gears: 3.73
Re: No start after engine swap

Bad news again.... So yesterday the car was running great I even took it to the store and it drove perfectly fine and today I get home to start it up and it does for 2 mins and shuts off again and now it won't start so I took out the plugs and they are fouled again with the smell of gas. If I were to use the stock chip and run it like that would it still foul the plugs while I wait for a moates cord to come in to datalog it?
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Old Jul 21, 2019 | 04:43 PM
  #52  
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Car: 1967 Camaro, 91 z28
Engine: Lb9
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Re: No start after engine swap

I think your stuck installing a new set of plugs.
If you install the 305 tune with 350 injectors it might run even richer than with your 350 tune.
Best to replace the plugs wait to get the xtreme aldl and datalog starting with closed loop idle if you can enter into closed loop. A wideband would be the best for tuning. Or if you don’t want to mess with chips look at dynamic efi ebl p4.
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Old Jul 21, 2019 | 06:36 PM
  #53  
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Car: 1991 camaro z28
Engine: SBC 355
Transmission: 700R4
Axle/Gears: 3.73
Re: No start after engine swap

What would happen if I installed the 305 chip with 19 # injectors? Or the 350 chip with the 19# injectors?
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Old Jul 21, 2019 | 07:21 PM
  #54  
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Car: 1991 camaro z28
Engine: SBC 355
Transmission: 700R4
Axle/Gears: 3.73
Re: No start after engine swap

Well I took out the old 02 sensor and it's very very black and Its also shaking on the inside so I'm 99% sure it's bad. Could this been the problem of the engine running rich the whole time?
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Old Jul 22, 2019 | 11:31 AM
  #55  
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Car: 1991 camaro z28
Engine: SBC 355
Transmission: 700R4
Axle/Gears: 3.73
Re: No start after engine swap

So yesterday I decided to put the stock chip and injectors in to see how it would run and if it would still run rich like before and I checked the plugs and they were starting to become fouled again.... That lead me to replace the O2 sensor whitch was bad. Do you think this could of been the problem all along with fouling the problem since it wasnt the chip or injectors. If I were to installing the 22# pound and custom chip do you think i could drive it?
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Old Jul 24, 2019 | 08:23 PM
  #56  
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Car: 1991 camaro z28
Engine: SBC 355
Transmission: 700R4
Axle/Gears: 3.73
Re: No start after engine swap

Finally solved the problem it turned out that the 02 sensor was causing the very rich condition. Motor is running excellent now and I've checked the plugs and they are burning just right !

Thanks to everyone for the help.
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