So after I installed the air gap, my temp will range anywhere from 160*-230*. I already bled the air out of it if your wondering. So here's the story. I drove from san francisco to central california on saturday morning and the temp gauge never rose above 170*. I drove for 2 hours non stop and the outside temp was 60* just in case your wondering. On the way today the gauge would vary from 200* to 240*ish. The odd thing about it is that it's not a steady temp. it will fluctuate but very slowly and bounce in an odd manor with no rhythmic pattern to it. There's no missing coolant, no coolant in the oil and no oil in the coolant. The upper hose was hot and the lower hose was pretty cool. One last thing, the upper and lower rad hoses where not rock hard but kind of hard non the less.

 

Sounds like the gauge is playing tricks on you. Verify the temp with a infared thermometer.

 

Temp gauge is brand new (not that that means much). I'll have to see if I can get a hold of a pyrometer. Any way to check if it's bad?

 

The only way I know is a bad way lol. My Gpa swears to ground the wire for the gauge out and if it doesn't peg out the gauge is bad. Have you replaced the sensor?

 

Yeah, replaced the sensor. the grey one that signals the temp gauge.

 

Did it work before?

 

Might still have a bit of an air pocket in there......

 

you're going to have some fun with yours too it appears..

I can dig up that thread of mine where I took pic's of how far the sender extends into the FI as opposed to the Keg.. there is a temperature difference between the two manifolds..

I know you know what you're doing, and I don't wanna sound as if I'm questioning you, but I gotta tell you straight: Those dang things make burping even harder than burping the keg.. It took me several days to get it right, and that was likely 1/2 hour to 1 hour sessions each with the front of the truck pretty high.. I would think I was good, just to rev the engine a little and BLIP-BLOP-BLUP- more air come out..

Once I chased the air out, the temperature settled and it settled low.. The FI runs a tad cooler than the keg and that is all I can figure.

https://dodgeforum.com/forum/2nd-gen...aybe-this.html

 

This has been commented on before. The coolant temp sensor is most likely not submerged in the coolant as deeply as it was on your stock intake manifold, and is picking up transferred heat thru the aluminum.

You have 3 options:

1) live with it, but make sure you don't have any air in there.

2) find a longer coolant temp sensor that is still compatible. I don't know if one exists, btw.

3) pull the intake manifold off and relocate the sensor by drilling and tapping in a different place, or shave the underside of the temp sensor's mounting point down in the water channel so more of the sensor is exposed to the coolant.

 

After reading drew's thread about the temp sensor awhile ago, I shaved enough of the temp probe to expose enough of the sensor. I'll try burping it some more, but I think i got it all out. We have really steep hills in san francisco so I got that going for me.