Engine temp too low, running issue

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Aug 28, 2013 | 08:13 AM

128auto

Thread Starter

Extreme HDF Member

Joined: Sep 2006

Posts: 10,114

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From: Vancouver B.C. Canada

Engine temp too low, running issue

My Streetbob ran like crap last saturday, the engine temp read 82f all the time no increment. No hesitation or misfiring but didn't run right, hard to explain. When I shut off the motor, it takes forever to start. I bet the ecu read low temp and kept dumping fuel. I took it for another hour ride, the temp read normal at 235f once a sudden, everything was fine since then. Should I expect a bad engine temp sensor? My question is, the sensor is located at the front cylinder, if the front cylinder is not firing, is the temp gonna stay that low at 82f? Thanks Alex

Aug 28, 2013 | 08:50 AM

DJY

Road Captain

Joined: Sep 2012

Posts: 678

Likes: 15

From: OHIO

not real sure it works, but I have read that you can let it run and spritz some water on the pipe to see if it sizzles when it hits the pipe.

Aug 28, 2013 | 09:17 AM

onemyndseye

Tourer

Joined: Nov 2011

Posts: 417

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From: Louisiana

seems to me a sensor issue.... damn hard to believe even on one cylinder it would only be 82f ...

hot tap water is 120f

Aug 28, 2013 | 09:20 AM

SLV

Elite HDF Member

Joined: Oct 2012

Posts: 4,423

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From: Outside the Lines

In my experience, a running motor would never be as cool as 82f, even if the cylinder wasn't firing. I'd bet on the sensor.

Aug 28, 2013 | 10:51 AM

Foxster

Road Warrior

Joined: Apr 2010

Posts: 1,739

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From: Suffolk, England

It might be worth just having a look at the sensor connector and make sure its in tight and that water hasn't got in there. Its just behind the horn, bolted into the front cylinder. WD40 in there might be an idea.