O2 Sensor Upgrade from LT1 to LT4 - WIRING

MACsVettes · 09-06-2010, 07:24 AM

We have installed an LT4 in our '93 LT1 Convertible and our tuner has recommended that we upgrade the O2 Sensors to the 4-wire heated LT4 Sensors, where the LT1 had a 1-wire sensor.

Has anyone done this or have the knowledge to assist us in where to tie the extra wires in? ...the ground is easy but there are two additional wires that go to the PCM which I doubt our earlier PCM even has an input need for them. email me and I can provide a link for the diagram of the LT4 sensors with extra wires circled

Any assistance would be greatly appreciated

InjectorsPlus · 09-06-2010, 05:59 PM

Do you not trust your tuner?

Heated O2 sensors are a good idea typically. If you have a stock exhaust and place them in stock locations, you really shouldn't have to.

If he's having a problem getting open loop, then yeah you need them. You hired the guy, trust him.

rcsrich · 10-04-2010, 09:42 PM

Hi,
I'm not allowed to post a link yet, so I put it in a PM
Good luck,
Rich

09-06-2010, 07:24 AM	#1
MACsVettes Smokin Member Join Date: Sep 2009 Location: Mansfield, TX Posts: 3 My Gallery	O2 Sensor Upgrade from LT1 to LT4 - WIRING We have installed an LT4 in our '93 LT1 Convertible and our tuner has recommended that we upgrade the O2 Sensors to the 4-wire heated LT4 Sensors, where the LT1 had a 1-wire sensor. Has anyone done this or have the knowledge to assist us in where to tie the extra wires in? ...the ground is easy but there are two additional wires that go to the PCM which I doubt our earlier PCM even has an input need for them. email me and I can provide a link for the diagram of the LT4 sensors with extra wires circled Any assistance would be greatly appreciated

09-06-2010, 05:59 PM	#2
InjectorsPlus Smokin Vendor Join Date: Mar 2010 Location: New Jersey Posts: 1,746 My Gallery	Do you not trust your tuner? Heated O2 sensors are a good idea typically. If you have a stock exhaust and place them in stock locations, you really shouldn't have to. If he's having a problem getting open loop, then yeah you need them. You hired the guy, trust him. __________________ Office:201-258-5600 Cell:201-403-3699 www.injectorsplus.com www.facebook.com/InjectorsPlus Custom fuel injectors for any application, marine, ATV, etc Tuning stock and aftermarket ECUs Fuel Pumps----Areomotive and Fuel Labs Lines Fittings ---- Red Horse, Fragola, XRP MARCELLA CUSTOM INTAKES ECU-----Fast, Holley, and Motorvation Intakes Manifolds for LSX, SBC, SBF, BBC Carb to FI conversion kits If it's fuel related and you don't see it, CALL, we can make it.

10-04-2010, 09:42 PM	#3
rcsrich Smokin Member Join Date: Feb 2010 Location: tremont, pa Posts: 39 My Gallery	o2 conversion Hi, I'm not allowed to post a link yet, so I put it in a PM Good luck, Rich Last edited by rcsrich; 10-04-2010 at 10:30 PM.

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