O2 sensor Question

[Casey Price]

My truck is a 88 1500 with the 5.7 Has long tube headers. How important is it to have the O2 sensors on. When I purchased the truck he told me he never put the o2 sensors on. Truck throws a CE light about 10-15 minutes after driving but will clear if I turn the truck off for a few minutes. Can someone send me a picture where and what the o2 sensor plugs look like.

 

[kennythewelder]

Front o2 sensors adjust fuel trim ratios. rear o2 sensors (the ones, or one behind the cat or cats) tell the ECM that the cats are working. Dont have a pic.

 

[PlayingWithTBI]

The 88 trucks had 1 O2 sensor at the back of the driver's side exhaust manifold. I put on shorty headers and the narrow band heated O2 sensor there. Later I installed a wide band O2 at the end of my Y pipe.

You must be registered for see images attach

For your long tube headers, you can buy a bung for an O2 sensor or something like this

https://www.summitracing.com/parts/...MI2Pyinrme4wIVR57ACh2XQQs7EAQYAiABEgJoIvD_BwE

 

[PlayingWithTBI]

How important is it to have the O2 sensors on

It's very important if you're running the TBI, the ECM won't know how rich it's running so it will stay in open loop and you'll lose MPGs and performance.

 

[Schurkey]

Yep...ONE O2 sensor in '88. OEM is a one-wire, non-heated. Last one I bought was about $15.

 

[PlayingWithTBI]

Yep...ONE O2 sensor in '88. OEM is a one-wire, non-heated. Last one I bought was about $15.

^^^what he said.
One issue with a 1-wire O2 and long tube headers, when the engine is breathing better the O2 may get too cold at idle to give proper feedback thus causing it to go into open loop until it heats back up. If you decide to go heated, go with a 4-wire, that will guarantee the sensor has a good path to ground.

 

[Casey Price]

Can you point me in the right direction for a heated o2. I had to run about 1 foot of extra wire to get it connected.

 

[PlayingWithTBI]

Can you point me in the right direction for a heated o2[/QUOTE

Here's a couple links

https://www.summitracing.com/parts/ado-afs123/overview/year/1999/make/chevrolet/model/camaro

https://www.michiganmotorsports.com...ector-fits-1996-2002-ls1-lt1-camaro-trans-am/

 

[What?]

Also, I recommend avoiding Bosch, I usually have nothing but issue with them on the GM. Denso, Delphi, Delco works pretty great for me.

 

[Casey Price]

Well that didn't fix the check engine light. Keeps throwing code 32 and 43. Has me scratching my head. From all that I've read on here it could be a majority of things.

All the egr stuff is new and passages are free and clear.

Was told the cap, rotor and plug wires are new. just put new plugs in it Monday.

Guess 'll start with the fuel filter and work my way forward.