I've read many posts on the Mondeo Mk3 TDCI overcooling problem. I have all the symptoms, hot then cold with heater on etc but I'm not looking for a simple answer as I don't think there is one. What I do need help with is checking whether the cylinder head temp sensor is working properly.
Can anyone tell me what I should expect to see if I stick a meter across the terminals a) when it's stone cold and b)at normal running temperature.
Ok, as I'm here I may as well ask about an additional symptom my car has. When I start from cold the car rattles like 1970s diesel Transit. It feels like it is almost in "limp" mode but there is no flashing glowplug light. I drive for a few miles until it warms up (still rattling all the way), at a convenient point I stop and turn the engine off and on again and hey presto it's fine, quiet and smooth.
My reasoning is that the temp sensor is giving engine management a wrong signal at start up that saying the engine is warm so the engine runs lean hence the psuedo "limp" symptoms. When I restart, the engine is warm so engine management is happy.
Does that sound plausible?
Thanks,
Zane.
Can anyone tell me what I should expect to see if I stick a meter across the terminals a) when it's stone cold and b)at normal running temperature.
Ok, as I'm here I may as well ask about an additional symptom my car has. When I start from cold the car rattles like 1970s diesel Transit. It feels like it is almost in "limp" mode but there is no flashing glowplug light. I drive for a few miles until it warms up (still rattling all the way), at a convenient point I stop and turn the engine off and on again and hey presto it's fine, quiet and smooth.
My reasoning is that the temp sensor is giving engine management a wrong signal at start up that saying the engine is warm so the engine runs lean hence the psuedo "limp" symptoms. When I restart, the engine is warm so engine management is happy.
Does that sound plausible?
Thanks,
Zane.
