1990 7.3 IDI on an F250

 

I'm gonna say air conditioning. Doesn't look like an OEM compressor setup on top there so I'm guessing it's got on-board air?

 

I would have to concur

 

That is the switch that controls the AC clutch on the stock FS-6 compressor. Mine is broke so I made a new connector, but you can tell from this pic how it plugged in.

 

Hi Ultimate, glad to see you made it over here.
Did you find out about cavitation yet?
How's things in the UK?

 

Thanks for all the pics and info everyone !

I wonder if this non-OEM A/C compressor is because its part of a conversion to R134 gas rather than the R14 or whatever it is......... I'll have to find a specialist in Air con I think and get a run down on whats fitted. I haven't actually tried the air con yet, but my guess its all but dead. I'll tape and secure that plug then I think as well.

Today, non stop tinkering with the truck - weather changed several times from windy to rain to scorching sun, back to rain again..... sigh

But I was pleased to get as far ahead as I did with the truck, thanks to this forum and the helpful tips and guidance I feel pretty good at the end of this day, got a lot done and with positive outlooks.

I have just spent a half hour looking at the info on coolant again. My biggest problem is getting things into U.K terms that local suppliers will understand. I don't have many auto shops in this town, but I know there is a John Deer showroom ( as this area is mostly agricultural and full of various tractors and combines ) but I expect a pretty high price from them. I'd go for Green coolant and an SCA addative, but I'd rather get something long life and even healthier for the engine. I should really change the thermostat too - in fact, does anyone have a part number for that ? Might be I can get it through a local Ford garage if its similar to something else in the UK.

Thanks again everyone !

 

Looking at your pix, I would recommend putting a bolt in the line clamp before you have an injection line failure from vibration.

 

looks like its missing a clamp too

 

Hi Marianna,

Not sure which picture you spotted the problem in, wa sit a problem with my engine or the original poster's??

 

Original posters. The passenger side injection line clamp is missing a bolt (under the air cleaner) and it's missing an entire line clamp on the drivers side (also under the air cleaner)

 

oh I see it now! Thanks!

 

Ooop ! Thanks for the observation ! I'll get to that today asap.

FYI, if no one else had seen my other thread, I just bought the truck on Sunday and its previous owner was clearly not very careful, at all. So any other observations or thoughts on things to check - do let me know !