1991 2.1 No Electric to Injectors

[Lobster]

Hi hope someone can help me I bought a T25 it started but had no mot, got the chap to deliver it to mine it started first time put it on my drive but one he went I tried to move it but wouldn't start, fuel pump works loads of clean fuel as I had to change tank replaced fuel filter. Changed leads plugs lovely big spark.
Replaced injectors still nothing petrol getting to injectors but injectors are not getting power, got someone to look at it he said there was a break in the injector wiring loom stripped all that off to find broken wire nothing wrong with wires.
Sorry it's long winded.

Thanks Paul

[maxstu]

DJ or SS/MV? It is about the same, anyhow.

Check earth cable left side of engine to bolt by coil.

Do a basic continuity check in the ECU.
Remove ECU multi pin plug and ignition on.

Check ECU ground wiring 25 & 7 . Zero ohms.

Check left relay 87 for injectors is working. Ignition on 13 & 7 should show battery voltage.

Injector cyl 1; 23 & 7 approx 16 ohms
cyl 2; 24 & 7 ditto
cyl 3; 12 & 7 ditto
cyl 4; 12 & 7 ditto

[Lobster]

Thanks will give that a go and let you know how I get in

[maxstu]

Just a thought. Where did you buy new injectors?
Try it with old injectors

[Robsey]

Injector cyl 1; 23 & 7 approx 16 ohms
cyl 2; 24 & 7 ditto
cyl 3; 12 & 7 ditto
cyl 4; 12 & 7 ditto

I make it =
Cyl 1 = 12 & 7
Cyl 2 = 24 & 7
Cyl 3 = 11 & 7
Cyl 4 = 23 & 7

According to VW ProTraining Doc
WSP 521 148 00

[maxstu]

Bentley.. but it does not matter. Just a long as each one is getting ohms. 7 being earth.

.

[Lobster]

It's a DJ when it stops raining I will go and check it out

[cobblers]

Does the fuel pump prime when you turn the ignition on? does it then start running again when you crank the engine over?

[Lobster]

Iv tried old injectors same thing, I can put spray into intake and it fires up then stops after a couple of seconds.
Yes pump works when you turn ignition on.

[maxstu]

But does it prime on ignition. Turn key for lights on dash. Pump should prime for a second then stop.

[Lobster]

Yes it's primes when I turn the ignition on.

[maxstu]

Test ECU with a meter as mentioned before.
Test with another ECU
Is it Auto or Manual?

[Lobster]

Altermatic

[Aidan]

Have you got power at the fuel pump relay on the thicker red and white that feeds the injectors, they get live power from there - the thinner one feeds the fuel pump
also does that voltage stay present when cranking engine or does it disappear ?

[Lobster]

I checked Earth from engine to body by coil and it's not connected to engine.
How would that stop the injectors from firing?