coolant temp sensor question

[NOKA72]

whats up guys...been playing with the car lately...workin out the bugs here and there...i have a question...my otc 2000 shows me a 20 degree hotter reading than my mechanical autometer guage...did anyone have a problem like that before...strange....when i get too the garage i am going too have too check the otc book and see if these figures are C or F but i figured i would ask....and what info do you need too see to help me with my slight bump in the idle i have...thanks vinny

 

[Twins]

My OTC 4000 shows 10 degrees colder than the VDO electric shows.

Different direction same problem...this is the 3rd coolant temp sensor ( my car eats them like candy) all have read this way.

I'm no help just in the same boat.

 

[cool 84]

Me, my dad, and a friend all have VDO electric guages and they all read about 10 degrees hotter than the scanner says. I think the difference is normal. I trust the ecm sensor because with the 160 degree thermostat on a 30 degree night the ecm reads 155-165.

 

[Buick From Hell]

My autometer water temp gauge reads nearly 35 degrees hotter than actual, I'm beginning to wonder if anyone makes an accurate temp gauge?

 

[WFO]

my mechanical autometer and my coolant temp sensor are nuts on.

for that matter,my knock gauge and my knock counts on t-link are the same too(1 light per degree of knock).

i must be the lucky one?

later,sean

 

[NOKA72]

whats up guys....today i checked it with a snap on scanner too see if there was any difference from my otc...same thing....i have a 20 degree difference from the scanner and the guage..i did the test with the scanner on the cts and it passed i think im gonna try another guage and see what happens...guess im gonna call summit tonight...