Lambda Sensor Questions Important

[moonxx]

This may help me or not but will ask the question for all you experts.

1. Does the lambda sensor sense heat or fuel mixture ?

2. Is the lambda sensor just a sniffer nose and detects how rich the mixture is ? and sends different ohms reading depending on mixture

3. If a lambda sensor is goosed will it:

a. can it make the spark plugs black because the ECU doesn't have a reading and doesn't know how to adjust mixture.

b. When the car reaches a warm condition make it stall at idle speed.

c. Also when warm will this make not start and why.

If their is any question that you are guessing please don't answer as this doesn't help just say "not sure ". I ask these questions because of my last post and have only 2 more sensors to replace this one and the TDC sensor. although an intermediate fuel pump problem will break my heart.:bang:
Last point to all you guys thank you very much for your help on earlier post,"seicento starting problem when warm" I will post thread if I eventially fix this seicento 899cc s.:worship:

 

[fingers99]

Replacing sensors willy nilly is not the way to proceed. Although your ECU is not OBD2 compliant, it can be read. Test sensors, rather than replacing them.

For Lambdas see here and [ame="http://en.wikipedia.org/wiki/Oxygen_sensor"]Oxygen sensor - Wikipedia, the free encyclopedia[/ame].

I can't see a lambda creating your issue.

 

[sludgeguts]

My lad's S reg fiesta was lumpy so he gave it a full service & replaced the lambda. the bloke off ebay sent the wrong one (although the specs on the auction were right). As soon as the engine reached temp, the car idled badly & kept cutting out. the new sensor came out after a couple of hours & was jet black - the original sensor was a pale brown. Bought the correct one from a local factor & everything ran fine.
BTW, it started fine when warm, just would not idle - also a real pita to drive as it would 'hesitate' - not good when you're pulling out of a junction
Also, the MOT guy couldn't pin a proper reading because of the dodgy sensor.

 

[moonxx]

Replacing sensors willy nilly is not the way to proceed. Although your ECU is not OBD2 compliant, it can be read. Test sensors, rather than replacing them.

For Lambdas see here and Oxygen sensor - Wikipedia, the free encyclopedia.

I can't see a lambda creating your issue.

Totaly agree and have taken on board this. Just thought i would try something else adjusted throotle speed up so it wouldn't stall when the car got warm and though and behold it ran for ever, so while warm i tried to check as much as possible. I took off near side front wheel to check TDC sensor and notice one of the bolts are sheered so fiddling with it the car stalled and would start, So it looks like this could be the fault after all.

Is their any way to test the crank sensor, I have taken it out and sheered the other bolt in the process so will have to try and bore it out and fit nut and bolts 1st bit of a pisser.

 

[fingers99]

Sheered bolt on an 899 will cerrainly cause it not to locate properly. Didn't I post the TDC sensor tests elsewhere? If not:

Between poles 2 and 3 575 - 750 ohm.