bad EGT probe or bad injector?

[MA2LA]

I have a weird issuse with my ruck. . I'm pretty sure something is wrong with either my comander or the egt probe. Getting on the high way towing this morning my temp went thru the roof so I panicked and pulled over. the data logger was saying i hit 1700 and i wasnt even on it. once i checked everything out to see if anything major was bad i started driving again. . the temps are all over from reading 32degs while coasting and just when i was geting home it was stuck on 1832deg. the truck has developed a miss but not like it was the last time i had an injector totaly go out and theres no more smoke than normal when i stand on it. I need to figure out what injector is acting up and swap it but i realy don't think its the cause of the wierd egt reading. the temp at times sem normal and other time seem stuppid both to low and to high .

 

[MAleshire]

Try going to the website for the manufacturer of your EGT gauge. Look to see if they have a trouble shooting guide for the EGT probe. I recall that the mfg. of my gauge (Westach) called for using an ohm meter to test for a faulty probe. Low and/or erratic readings are often caused by dirty or faulty connections. Disconnect, clean, tighten, and thoroughly check all connections. On mine, the ohm meter should measure 2. 5 across the leads---or there abouts. This will vary some due to a possible difference in temp between the end of the probe and the end of the leads where you are testing. Anything above 10 ohms indicates a faulty probe. The testing process may well be different for different manufactures. Hope this helps some.



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