3b s2 coupe resurrection

[andy10v]

I have 5v and earth continuity, I never checked it against itself.

Trying to rustle up a dizzy to borrow tomorrow.

Popped the dizzy out, 13mm crescent spanner makes it easy, I wish I had thought for that before!



Just looks like a dizzy to me, anything I can check?

[twoqu]

Possibily!
Still a cheap one can do the other basic tests!

[twoqu]

Surprised it hasn't thrown a fault code if it is the hall sensor. It should recognize wiring as well as mechainical faults.
Previously it appeared to be indicating an alignment issue.

[newsh]

Bloody hell, it's frustrating isn't it.. I don't think I have anything to add apart from working through things logically.

Fact is though, if you've got no hall sensor signal at the correct time then you should have no fuel so something is not right..

[andy10v]

********.

I thought fuel was from engine speed? Or is that just the fuel pump relay and the ecu only does injectors/spark when it sees crank and cam?

[twoqu]

I wonder if the plugs were wet just from the output test. Presumably if the injector is activated it would spray a little bit of fuel. The hall sensor would not be in the loop for the output test.

[andy10v]

That would also make sense.

So fit spare known working dizzy tomorrow, then try starting, read fault codes and start basic no start procedure again?

[newsh]

Yep as you say, fit dizzy and try starting.

Good call that, wetness could be from output test..

[Error404]

You definitely checked the coil harness wiring pin-out I sent you mate?

[twoqu]

You definitely checked the coil harness wiring pin-out I sent you mate?

Problem is it did work previously so providing he hasn't touched the wiring it should still be ok. It sounded like it was dying due to running out of something either fuel or electrons.
Still think that under 12V at the injectors doesen't sound right if the battery healthy. As you have relocated the battery might be advisable to check the connections including dare I say the earth for the new battery location!

[twoqu]

The coolant temp sensor and IAT need a look at. For example the G62 would need a reading of in excess of 13K ohms to get a minus temp of that reading. As both have the same reading thats a bit suspicious. Even without the engine running they should show more or less ambient figures. Did you have to repopulate those during the COP swop?

I have checked and they have the same pins on both 3B and ABY. However they also share the same earth going back to Pin 30!

[twoqu]

Another thing whilst I think of it. If the ecu thinks that the coolant and air temp is minus 49C then presumably it will just bung fuel in.

[Error404]

IME vagcom always shows those temp readings unless engine is running

[twoqu]

IME vagcom always shows those temp readings unless engine is running

Ah! Perhaps I need something to play with that has more than 10 measly measuring blocks!

[andy10v]

You definitely checked the coil harness wiring pin-out I sent you mate?

Yup, checked it again, also as twoqu says it was working before and the pins will not have moved themselves.