ECT and EOT question

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Oct 18, 2011 | 08:14 PM

dakotajeep

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Laughing Gas

Joined: Aug 2007

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From: Baldwin, ND

ECT and EOT question

Finally got a gauge so I have accurate information. Edge Insight arrived the other day and I have put a few hundred miles on it since.

Cruising my delta is no more than 8-9 degrees but my temps hover around 170F while cruising empty at 55mph. The only time that I saw 190F was when I pulled my boat. Just curious if this thing is running cold.

I was under the impression that a cold running engine made the mileage decrease.

Just curious for your thoughts...

Thad

Oct 18, 2011 | 08:27 PM

05 f250 6 inch lift

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Joined: May 2010

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From: Alabama

I just checked my temps the other day. My truck was running 190 to 200 water temp unloaded. If urs only runnin 170 unloaded. That's to low. Should b around 190.

Oct 18, 2011 | 09:01 PM

U.P. Builder

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Joined: May 2007

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From: U.P of Michigan

Time for a new thermostat, that ect is way too low. Mine ran low also, not that low but around 180 unloaded. After replacing the thermostat it now runs 188 - 190 all day, a little more if pulling a grade or towing.

Oct 18, 2011 | 10:01 PM

weldworks54

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Mine ewt also ran low mine was in the mid to high 160's change the thermostat now it's up to 190 all day and also running a lot better

Oct 18, 2011 | 10:20 PM

Dieselpop

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From: Oregon

As stated get a new Ford t/stat and o-ring mine run ECT 194-196* EOT 200*
pop

Oct 19, 2011 | 06:52 AM

npccpartsman

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Joined: Dec 2003

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From: Stuttgart, Ar

Quote:

Originally Posted by dakotajeep

I was under the impression that a cold running engine made the mileage decrease.

Just curious for your thoughts...

Thad

That used to be the case for a gas burner but not for fuel injection and definitely not on a diesel. You'll get better engine efficiency running at the correct temperature especially when the PCM is looking for a particular set of values for optimum performance.