oil in ecu socket

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jdandcoke said:
pulled the pipes off. all look ok. found a video on how to test the sensors but i dont have a thaco to read it so i guess ill just have to change it and see what happens
Click to expand...
The MAF sensor (mass airflow sensor) is merely an element that is heated until it glows hot. The cold air being drawn in via the air filter flows across it and cools the element down. The current required to maintain the element at a pre determined temperature is what the ECU measures.
Most MAF sensor failures are because the element has gone open circuit. You can test the element with a multi meter.
 
Shifty1962 said:
The MAF sensor (mass airflow sensor) is merely an element that is heated until it glows hot. The cold air being drawn in via the air filter flows across it and cools the element down. The current required to maintain the element at a pre determined temperature is what the ECU measures.
Most MAF sensor failures are because the element has gone open circuit. You can test the element with a multi meter.
Click to expand...

ill give it a try but i was goning by a video which shows a signal comes out of the third terminal, if it is tapped on the top and it changes the its in the way out

here is the vid
How to test and replace mass air flow sensors | Video « Wonder How To
 
jdandcoke said:
ill give it a try but i was goning by a video which shows a signal comes out of the third terminal, if it is tapped on the top and it changes the its in the way out

here is the vid
How to test and replace mass air flow sensors | Video « Wonder How To
Click to expand...
Interesting. I was not aware of the pulsed output which the ECU can obviously measure. Maybe the guy that explained it to me regarding current used to maintain a pre set temperature was wrong. I've learnt something today. Maybe he meant pulses produced to maintain the heating element temperature?

Both of the MAF sensors that I have had go bad were open circuit on the heating element between the + and - neg terminals. Its a bit like a light bulb filament which gets brittle over time until the slightest knock breaks it. One was on my defender and the other on my wife's Volvo.
 
Shifty1962 said:
Interesting. I was not aware of the pulsed output which the ECU can obviously measure. Maybe the guy that explained it to me regarding current used to maintain a pre set temperature was wrong. I've learnt something today. Maybe he meant pulses produced to maintain the heating element temperature?

Both of the MAF sensors that I have had go bad were open circuit on the heating element between the + and - neg terminals. Its a bit like a light bulb filament which gets brittle over time until the slightest knock breaks it. One was on my defender and the other on my wife's Volvo.
Click to expand...

there seems to be different types of the maf sensor the on you are refering to is a hotwire where as i seem to have a coldwire sensor

found this on it
Mass flow sensor - Wikipedia, the free encyclopedia

thing is i wouldnt of thought that sensor going down would make the engine die while at med-high rev would it
 
ok going to ignore the maf sensor for the moment
had the faults cleared yesterday and took it on the motorway today. done it again so i put it back on testbook
faults are as follows

topside injector circuit open
injector 1 circuit open
injector 2 circuit open
injector 3 circuit open
injector 4 circuit open
injector 5 circuit open
 
well once i got a nanocom and read the faults myself i found the the topside switch fault was saying post injection not pre injection which ruled out the ecu. so basically the fuel pressure was dropping and tripping out the injectors. guess the fault codes make sense when you know what the fault is, but a bastard if you dont, would of made sense to put a fuel pressure sensor somewhere but that would make it too easy
 
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