5.3 turbo
Jul 16, 2018 | 11:24 AM
#1
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Teching In
Joined: Apr 2018
Posts: 13
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From: Virginia
5.3 turbo
I recently installed a turbo setup on my Tahoe. Curious as to whether with factory flex fuel injectors as well as a factory tune should it start up and idle? Not for driving purposes but just to check for leaks in regards to fluids and exhaust. Also would all of the factory O2 sensors need to be plugged up in order for it to start up that way? It currently will crank but will not turn over I currently only have 1 O2 sensor connected as well as my wideband and the factory MAF sensor.
Jul 16, 2018 | 11:34 AM
#2
Yeah it will run no problem with factory injectors. Like you said just for getting it going is no problem, they won't support much power though being only 38lb/hr.
Technically it could run with no o2 sensors and just default to open loop only but having just the upstream working will be what you want. The rear o2 sensors don't matter and can be removed and turned off in the tune.
Now if you installed a 2 or 3 bar MAP sensor along with this turbo, it's not going to run without a tune and make sure the MAF sensor is pointing the correct way.
Technically it could run with no o2 sensors and just default to open loop only but having just the upstream working will be what you want. The rear o2 sensors don't matter and can be removed and turned off in the tune.
Now if you installed a 2 or 3 bar MAP sensor along with this turbo, it's not going to run without a tune and make sure the MAF sensor is pointing the correct way.
Jul 16, 2018 | 11:46 AM
#3
Thread Starter
Teching In
Joined: Apr 2018
Posts: 13
Likes: 0
From: Virginia
Yeah it will run no problem with factory injectors. Like you said just for getting it going is no problem, they won't support much power though being only 38lb/hr.
Technically it could run with no o2 sensors and just default to open loop only but having just the upstream working will be what you want. The rear o2 sensors don't matter and can be removed and turned off in the tune.
Now if you installed a 2 or 3 bar MAP sensor along with this turbo, it's not going to run without a tune and make sure the MAF sensor is pointing the correct way.
Technically it could run with no o2 sensors and just default to open loop only but having just the upstream working will be what you want. The rear o2 sensors don't matter and can be removed and turned off in the tune.
Now if you installed a 2 or 3 bar MAP sensor along with this turbo, it's not going to run without a tune and make sure the MAF sensor is pointing the correct way.
Thank you, I have a set of LSA injectors I'm going to swap into it for the tuning since I'm not planning on making any big power. I'm not sure what my current issue is though based off your response guess I need to do a little more troubleshooting. I need to look into I guess if I have the MAF pointing in the right direction. I currently have the O2 sensor in the crossover pipe on the driver side and then the wideband in the downpipe. It cranks but will not start. Wasn't much for me to disconnect for the install so I'm sure I didn't leave anything disconnected which is why I'm puzzled as to why it won't run.
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