Heater low temperature, lack of power, connected?

I posted yesterday about low heater temperature but re post having learnt more in the hope a TD5 expert can help!

I have previously been trying to sort out a lack of ooomph! up hills it is gutless and I suspect top end though it is not pushed fast on the whole. It does seem over 70 is just runs out of steam if I try it and I know over 16 yrs we had it she will if pushed carry on way past that.

I have recently noticed the heater is only warm...not nice and hot, of course it may have been this way for some time and not noticed until cooler weather!

I am sure the heater is fine, no airlocks etc...it gets warmish.

Today I drove with hawkeye on and the coolant did not get over 81 degrees assuming the car sender is correct. All hoses in the car were no more than 50 ish degrees. Both heater hoses similar temperature.

I now wonder if the power loss and cool running (though gauge is midway) are connected? Thermostat??

I believe it has a bypass valve which if faulty can cause strange issues.

Russell Marlow said:

I now wonder if the power loss and cool running (though gauge is midway) are connected? Thermostat??

Click to expand...

It's the other way around... with low coolant temp and fuel temp input it should be more "nervous" than at normal operating temp.... see the fuel temp live input, at around 80*C coolant temp it shoudl be at least 10 dergrees lower...if the FT input is high the ECU is reducing the fuelling which is the same for high coolant temp too when the gauge goes to the red one which is not the case here

I think I understand that thanks....so I need to look at fuel temperature too? Are there any things I could look at for its gutless performance?
Turbo boost seems fine.
Coolant temp is low 80 degrees so thermostat to do.
Not had EGR for many years.
Only fault I pick up is EGR of course and for years high manifold pressure I cant fathom out but it always drove fine like that.
No other obvious issues though I am not knowledgable enough to know what readings some live data should give.
I love the old truck.....but really need to sort it.

Russell Marlow said:

high manifold pressure

Click to expand...

Replace the MAP sensor then, as about readings see the attachment

sierrafery said:

Replace the MAP sensor then, as about readings see the attachment

Click to expand...

Thanks, replaced the sensor on the manifold...no change!

Then read all live inputs at idle and the manifold pressure under load and post here the results

I will do thanks...may be a while, have a funeral to deal with. It always drove fine even with the high pressure reading which without the Hawkeye would have been unknown. Thanks again.