High EGT's at Low RPM?

[R.E. Miller]

My truck does have the 12cm^2 housing on it now, but this has been something I've noticed before I changed to the 12. Compared to my other trucks, it seems to run higher temps even after idleing for a while. For example, both my Dad's pick-up and my 1-ton dump will reach 225* in a reasonable amount of time after idleing. My pick-up however will just get to 300*, and getting below that is a lot of work. All of the filters are new, and I am running a really short straight pipe. Thanks for the help.

Russell

 

[Lil' Dog]

Valve set / Timing?

If either of these are different between the two you could see higher EGT at idle. How about Idle speed? That could also raise the EGT a smidgen.



The other could be just the EGT probe itself. They are less accurate at lower temps.



$0. 02 J-eh

 

[R.E. Miller]

Thanks Lil' Dog,

I need to check the valves, and the timing I am not sure of. The idle seems normal, but I think that the smoke screw might be jacked up too much and some one adjusted the idle down to compensate. I'll have to check this stuff when I get a chance.

Thanks again,

Russell

 

[Power Wagon]

Late (retarded) injection timing will raise the temperatures.



Also, if you have anyting that's loading the engine down, making it work harder at idle, that would do it. A/C compressor running full time?



Just thinking out loud, here...

 

[R.E. Miller]

Funny you should say that PW

Ha ha ha, that did just happen, but I fixed the A/C always on problem and it had no effect on the EGT. I was wondering if it was the thermocouple? I am running the new Isspro EV's and figured that they would be the most accurate ones out there. I need to check timing and the valves and then I'll report my findings.

Thanks,

Russell

 

[R.E. Miller]

Sorry,

I just remembered something... . my milage has been going down too, and I wonder if these two problems relate or not. Could my lift pump be shot? Just another thought.

 

[Lil' Dog]

If mileage is also being affected, timing seems to be the culprit. Do the valve set anyway, it'll help a little anyway.



J-eh