I just installed the Stainless Works Performance Connect Long Tube Headers on my 2018 5.0 and the O2 sensor extension cables that they sent have the wrong connector. After contacting Stainless Works and sending them pictures they said that they have never seen the connector on the new 2018 trucks before. I googled for over two hours and was not able to even find sensors or extensions that have this new connector on them. It is a flat 4 pin connector similar to ones found on some GM vehicles but not the same.

The truck is running but right now the rear O2 sensors are not plugged into anything. I have been researching splicing longer wires directly into the O2 sensors rather than using an extension cable and many people say not to do it while others say it’s OK. I just need a solution that works and is dependable. Right now Stainless Works is looking for a solution but I don’t know how long that will be.

If anyone has a source or part number for both the new flat male and female connectors on the 2018 so that I could build my own extensions I would greatly appreciate it. Or if anyone has any experience with splicing in additional wires directly into the O2 sensors that might also work, but less ideal.

 

I’m not saying do it but I had to splice the O2 sensor wires on my blown Ram....never had any issues. My wires wound up damaged so I fixed them with butt connectors and shrink wrap and it’s been fine since 2014.

 

I can't remember who exactly said this...could have been livernois or whipple. But someone I considered reputable recommended against extension harnesses. No one can buy the actual OEM connectors, so they have to reverse engineer them and manufacture themselves. These reverse engineered ones are never exactly like or as good as the originals, so they wind up with a bad connection, leaking, or corroding over time. They recommended splicing them, but emphasized soldering and using weatherproof shrinkwrap. I would recommend getting an electronics repairman to do it and splice on the sensor side of the connector.

 

Or your local dealer electrician, as they repair oem harnesses all the time.

Just take them the sensor and extender.

 

WTF is a dealer electrician?

 

How does this affect the original manufacture warranty from Ford?

 

What warranty.

 

Haha...I like the way you think.
I was reading some things about O2 sensors and the output voltage range is only .1 to .9 volts so they could be worried about noise and voltage drop when extending the cable.

I also seen in the 2018 Wipple manual said running long tube headers you have to go with a custom tune, perhaps it's just Wipple covering their butt....Kind of bummed me out a little though, your headers look great!


Mike

 

Exactly. If I wanted a warranty my truck would be stock.

 

Did you get this resolved?