Trying to find a miss in 96 Discovery 3.9

Update.


Cannot get a resistance reading through the sensor. I am using a digital meter but it has been suggested it's the wrong type.

Maybe I have fried it once & for all?????? :eek: :(

Can anyone help with the P/N for the 'Engine Coolant Temperature Sensor' for the 3.9 V8 please?

Cooper has invoiced the one I bought as ETC8496 sender W/temp ECU at $27.89 plus GST.
Regard s Philip A

Thanks Philip.:)


What was your problem then, & did it fix it?

your run into town may have given the engine a bit of a clean out.....
if you do short trips they clog up with carbon.....

Hhhmmmmm, how so, zook? The sensor is in the coolant circuit & not in any contact with carbon.:confused:

I didn't have a problem. I fitted new sensors to the Thor manifold that I put on the car. Just to be sure that any problems that arose during the install were not caused by faulty sensors.

You know , through all of this , I still do not have a clear idea of under what circumstances that your car plays up. If you are just driving along at 80Kmh and it starts to miss, drops out, then the odds are your TPS has died. Also , tip in after going down a hill and resuming progress will be jerky, as will taking off from a stop.
The TPS is the only "wear" item in a 3.9 injection, in that its a variable resistor "volume control" basically, with a contact that rubs along a resistance track.
Its pretty expensive so you should check it first. The way to check it is to put a multimeter " on resistance if off, volts if on" across the signal wires and see that you get a smooth transition eg increase in volts or reduction in ohms with no backtracking or dropouts. Most problems of drop out will be just after rest, ie idle.

Regards Philip A

Thanks Philip.:) It is open circuit at all temps. When it was hot yesterday & cold 1st thing this morning.

I feel it is tied in with the crap intermittent idling (usually at traffic lights) which I have experienced over some years & have mostly 'blamed' the Idle Air Control Valve & Base Idle adjustment, but could not see how this could 'unadjust' itself. The IAC has recently been replaced with a new one.

http://www.kemparts.com/scripts/140.asp

It's better, but still has it's moments so after reading some of these posts & browsing the web, I checked the continuity of the TPS/ECT & found it lacking, to say the least. There were moments when I 'thought' I had readings, but now deffo not. Maybe my intermittent problem has now become permanent?

Thanks for all the tips, I have decided i will take the risk and drive it to vic and then find the problem there, as i have alot more contacts there. goes good on long runs so i think it will be fine, maybe use a bit of extra juice if anything. Again, thanks for all the help to all.