Starting engine without O2 sensors connected - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Tilt · 09-08-2015, 10:31 PM

I'm finishing up a few last things to be able to try and start the engine up for the first time. I went to hook up my O2 sensors and the BP Automotive harness has different connections than my sensors do. I've sent him a message but haven't gotten a responce yet and haven't had time to give him a call yet. Can I start the engine without them and just let it idle?

**LockDoc** · 09-08-2015, 11:25 PM

Quote:

Originally Posted by Tilt

I'm finishing up a few last things to be able to try and start the engine up for the first time. I went to hook up my O2 sensors and the BP Automotive harness has different connections than my sensors do. I've sent him a message but haven't gotten a responce yet and haven't had time to give him a call yet. Can I start the engine without them and just let it idle?

I test drove mine without them installed. No exhaust at all just headers....

LockDoc

Custom 68 · 09-09-2015, 10:50 AM

I dont believe they are going to be used during the "warm up" on initial start so yes you will be ok.

Mayfield · 09-09-2015, 11:12 AM

John @ speartech told me not to use the 02 sensors until I had a full exhaust. Something along the lines that it will be reading too much of the air and not whats coming out of the headers.
I put a few miles on mine with open headers & the 02 sensors hooked up. My passenger sensor went bad shortly afterwards, not sure if that was the reason or not.

Tilt · 09-09-2015, 08:42 PM

Thanks guys. I just ordered a set of the Bosch 13026 sensors with the connections I needed. The bad news is it looks like I won't be able to start it till this coming Tuesday. I can't find anyone with the plug wires I'm looking for (Taylor 409 Race-Fit Pro Race Spark Plug Wires 79614) that can have them here before then.

09-08-2015, 10:31 PM	#1
Tilt Registered User Join Date: Jul 2014 Location: Dayton, TX Posts: 335	Starting engine without O2 sensors connected I'm finishing up a few last things to be able to try and start the engine up for the first time. I went to hook up my O2 sensors and the BP Automotive harness has different connections than my sensors do. I've sent him a message but haven't gotten a responce yet and haven't had time to give him a call yet. Can I start the engine without them and just let it idle? __________________ '83 Silverado Step Side '85 GMC short bed. '86 Chevy Step Side Custom Deluxe LQ9/4L80 swap (SOLD)

09-09-2015, 10:50 AM	#3
Custom 68 Registered User Join Date: Nov 2001 Location: Springfield, MO Posts: 2,939	Re: Starting engine without O2 sensors connected I dont believe they are going to be used during the "warm up" on initial start so yes you will be ok. __________________ Dave 1968 Custom Chevy with turbo charged 5.3 gen III 4l80e swap 1967-71 GMC 3/4 ton long step 4x4 (not sure what year exactly?) "A good friend will bail you out of jail...but a true friend will be sitting next to you saying "that was frekin awesome". "If it doesn't fit force it...If it breaks then it needed to be replaced anyway!"

09-09-2015, 11:12 AM	#4
Mayfield Registered User Join Date: Aug 2013 Location: Murray, Kentucky Posts: 38	Re: Starting engine without O2 sensors connected John @ speartech told me not to use the 02 sensors until I had a full exhaust. Something along the lines that it will be reading too much of the air and not whats coming out of the headers. I put a few miles on mine with open headers & the 02 sensors hooked up. My passenger sensor went bad shortly afterwards, not sure if that was the reason or not.

09-09-2015, 08:42 PM	#5
Tilt Registered User Join Date: Jul 2014 Location: Dayton, TX Posts: 335	Re: Starting engine without O2 sensors connected Thanks guys. I just ordered a set of the Bosch 13026 sensors with the connections I needed. The bad news is it looks like I won't be able to start it till this coming Tuesday. I can't find anyone with the plug wires I'm looking for (Taylor 409 Race-Fit Pro Race Spark Plug Wires 79614) that can have them here before then. __________________ '83 Silverado Step Side '85 GMC short bed. '86 Chevy Step Side Custom Deluxe LQ9/4L80 swap (SOLD)



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