Hi im new on hear but been in the background for ages looking bits and bobs up.

Had my Skoda a while and never had any issue with it till yesterday night.

It was driving along then cut out. Got it started again on the 8th or 9th turn of the key. It was low on fuel but not empty as such.

Then started to drive home and just cut out and wont re-start at all.

So put another £5 worth in via a jerry can and still wont start.

So lost and called the AA out, they came out and plugged there computer in and it wouldnt talk to the ecu.

Did all sorts of stuff,

Undid the crank sensor and plugged it back in, rev counter moves on cracking so they said its ok. But there is no power to the injectors and to me the fuel pump is not working. No lights on the dash and immobliser light goes out. Checked all the fuses and all is ok and the two relays in the passanger section look ok also.

What can it be.

Car is a 1.4 8V MPI its a 2001.

Any help would be great as I am lost on this and dont want to get an auto electrician out for something simple.

If I understand the way injectors work they get power only when told by the ECU, at which point they open up to allow pressurised fuel in.

Best way forward is probably to get Vag-com/VCDS installed on a laptop plugged into it.

Does it only fail to start when hot?

If I understand the way injectors work they get power only when told by the ECU, at which point they open up to allow pressurised fuel in.

Best way forward is probably to get Vag-com/VCDS installed on a laptop plugged into it.

Does it only fail to start when hot?

Wont start at all, just tunrs over and over. I have taken the fuel line to the fuel rail off and there is no fuel been pumped to the rail either. But would that be down to the injectors not powering up.

Injectors aren't powered by the ECU they are earthed by the control unit.

When you crank it over does the rev counter move at all.

Faulty engine speed sensor, nothing else will do what you describe unless the ECU is bricked in which case the dash should light up like a christmas tree.

Injectors aren't powered by the ECU they are earthed by the control unit.

When you crank it over does the rev counter move at all.

Yep it does move.

Faulty engine speed sensor, nothing else will do what you describe unless the ECU is bricked in which case the dash should light up like a christmas tree.

I'd go with that.

Faulty engine speed sensor, nothing else will do what you describe unless the ECU is bricked in which case the dash should light up like a christmas tree.

All lights come and go off as they always have when the ignition is turned on.

Where abouts is the engine speed sensor?, also is it something you can change at home with no special tools and anyway to test it or get the car going?

Thanks people for all your help, already got more then what I did from the AA.

When you crank it over does the rev counter move at all.

Says yes in first post.

Is engine speed sensor not just another name for the crankshaft position sensor?

In addition to the crankshaft position sensor there's a camshaft position sensor on front of the engine in the centre - the one held on with a bolt. I figure that's required for the ECU to know when the engine is at Top Dead Centre.

Thanks people.

Does anybody have a picture of the engine with the sensor location/names on it as this would be a great help.

Im still stuck with the sensor locations.

If it was a Ford I would have no trouble.

I have only just noticed that the engine is installed backawards with the exhaust towards the bulkhead instead of towards the bumper.

Anyways, if you look at the front of the engine behind the bumper there is the oil filter, Whats the sensor to the right of it?, Whats the other sensor thats even far right towards the gearbox and flywheel?

I assume non of them are the crank sensor or cam sensor?

So both of these must be on the back. I have searched all over for a picture/diagram of the other side of the engine and the location of these sensors. Even looked on the EPC (which I consider very poor in detail against my Ford one) or I could have found them on there as a refrence.

If I get a picture of the engine can anybody point me in the right direction, if I know where they are I am ok changing them or testing them.

I'll do you one better... You've got a pm

It's not installed backwards in the conventional sense, it rotates the normal direction. Unlike the Honda engines in Rover which run the opposite direction and are installed with the gearbox on the opposite side. Just the intake and exhaust manifolds happen to be installed on the same side of the engine. Most 16v engines have intake valves at the back, exhaust valves at the front - and the manifold locations correspond. It's an overhead valve so the pushrods at the front of the engine make putting the exhaust manifold there difficult.

I think this is a picture of the 1.4mpi block. The camshaft position sensor is next to the oil filter. The one on the right would be the oil pressure switch.

Many thanks all. Going to get a new sensor tommrow and fit it over the weekend.

Thanks again and I will update this as I do it.

I assume the crank shaft or as Skoda call it the car speed sensor is on the side where the exhaust manifold is and stuff where space is alot tighter.

Would it be easier to go from below to acces this?

Edited 13 October, 201114 yr by sejin999

Much easier to go from below to change the G28 'engine speed sender'.

Thanks to everybody above and esp Chris who pointed me in the correct direction for the speed sensor.

Only snag is new sensors fitted (Access for the camshaft one was great, speed one alittle tight with the coolant hose but done) but the injectors still have no power to them.

I have had an auto electrician round, had to bite the bullet and his tester cant connect to it. He suspects the ecu is dead. Despite the lights going out on the dash.

Are they known for just packing in, also how easy is it to change one.

They're not known for packing in...

And on that basis i'd suggest having VCDS/vagcom on to see what it's saying, then unplug/replug and/or trace continuity for the cables to and from the ECU and the injectors.

Also...

You might want to check Fuse 61, 56, and 52 as well.

And if all that fails or you've not got vcds...

...I'm not far away. Could always pop over tomorrow