water temp sensor causes header to glow

Dedicated forum for all things electrical... Sometimes Electrical issues can really get you stumped! Not Stroker related.
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Posts: 2
Joined: March 28th, 2023, 10:33 pm
Stroker Displacement: 4.6L
Vehicle Year: 2004
Vehicle Make: jeep
Vehicle Model: wrangler t

water temp sensor causes header to glow

Post by geeknahalf »

Hi Folks,

I'm stuck.

I have a 2004 jeep wrangler TJ, and I recently built a 4.6 stroker and I'm experiencing an odd issue. When i plug the water temp sensor in (it's a new unit), it runs great for about 5 minutes then goes down hill. The eng runs rough, stumbles, gurgles in the muffler, runs like crap, has zero power, and the exhaust glows red. In essence, it's completely undrivable. I have a lot of money tied up into this and don't want to ruin it.

I have replaced the entire exhaust so no restrictions there. Its a 99 wrangler exhaust which only comes with two O2 sensors, so I relocated the remaining O2 sensors required for the 04 next to the factory locations on the 99 system, upstream/down stream respectively.

The timing is set properly as far as I can tell- on TDC compression stroke and the cam sensor lines up according to the alignment tool (no hole to use, they include a cap that aligns the placement)

If i unplug the coolant temp sensor the jeep drives enough that i got it home from the mechanic shop, and the exhaust doesn't glow. They couldn't determine the cause...

I'm sure there's information I'm forgetting, but I'm at such a loss and burnt out that I cant think straight so please ask questions.

Before I made the swap, the jeep ran great.

Any guidance would be greatly appreciated.

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