You are reading a single comment by @mi7rennie and its replies.
Click here to read the full conversation.
-
Swapped sender for ECU and gauge, after around 5 minutes the gauge goes above hot. Fan is not kicking in at this time, suggesting that the ECU doesn't believe the engine is overheating.
mi7rennie-
I'm still a bit confused about the setup so apologies if this doesn't make sense, but could you have accidentally changed the voltage ratio on the ECU (if it's aftermarket/standalone) so the gauge is reading the incoming voltage indirectly?
Could be the fan is just on its way out so it seems like there's a wiring/gauge/sender issue but actually the fan is just semi borked?
NurseHolliday
Given they're cheap, I'd get a new thermostat first and a new sender for the gauge and see what happens. Are you using an MX5 rad? They make alu versions that I've got that are much better.