Hi all, I've got an issue with my 2004 F150 Lariat. I replaced the original engine with a new one from Powertrain. I've put a few hundred miles on it, and it runs great. The first cold morning that I drove it, I noticed the temperature gauge not registering where it normally does. After about 50 miles CEL came on, don't remember the code number, but it was coolant temperature too low. When I replaced the engine, I replaced all the parts of the cooling system. My first thought was maybe the thermostat was sticking open so I checked it first and it's working fine, coolant level was good also. Must be the CTS sensor under the intake of course since it was the one sensor that I didn't replace. That didn't fix it either. Then I unplugged the sensor and checked the voltage at the plug with the KOEO, I believe I read through searching it should register 5 volts, it read exactly 5 volts. I checked the ground at the plug and it checked good as well. I read that the PCM sends the signal to the temp gauge. I also tried the "gauge cluster check" but I haven't got it to work for me ? If anyone has any ideas, or can help me troubleshoot this issue, I would be grateful. Thank you.


v/r,
Parker

 

Anyone have any ideas ?

 

Get the fault code number.

 

ProjectSHO89, thank you for the reply. That will be my next move, it'll be a few days before I'm able to get back to work on it.

 

all I can tell you is , my 2004 5.4 started doing the same thing , gauge reading low , by the time I replaced the temperature sending unit under the intake manifold, I had clogged all 4 of my catalytic converters , Don’t ever wait , when check engine light comes on , find out code and fix immediately

 

Wanted to post an update. I plugged the harness back in at the firewall and fished it under the intake. I removed the alternator so that I could squeeze my hand into the tight spot and plug in the CHT sensor. Topped off the coolant and fired her up. With the scanner hooked up, I waited for the engine to warm up. The temp gauge came up to it's normal place, and the scanner showed the engine temperature @ 194 degrees. I honestly believe that I didn't give it enough time to warm up after swapping the CHT sensor. I'll keep an eye on it.

 

So i just recently removed my catalytic converters from my 2005 ford f150 2wd and been searching for new ones but the ones i come across aint available for delivery in California so i whas thinking can i use 4wd catalytic converters on my 2wd? I need sum help on that thank you.

 

I would ask a local smog guy

 

if these are viable converters , I would drop ship them to a friend in a nearby state and get them shipped by them to me .or go pick them up . I can buy some chemicals locally at a high price but amazon won't ship them directly to me so I drop ship them .
Its not like you are not going to put cats back ..
I would also consider drop shipping them to a nearby state at a repair shop and drive over there and get it done. Canadians have to do this all the time.

 

You could buy a California legal set of cats.

 

no way in h--- would I cave to those prices.