Injector Does Not Give Fuel

[kachel 5]

None of the injectors give fuel. There is fuel at the rail. Are the injectors constipated or is the ecu not giving a signal? Is it measurable when the ecu sends a signal? The car did not run for two years.

[welshpug 1,661]

do you have spark?

[kachel 5]

Yes, tested with a screwdriver in the ignition cable on the inlet manifold. It gave spark.

[toolie72 67 1 Cars]

Check connectors that go to injectors when cranking-if no variance then it's electrical-if there is a signal then it must be fuel related

At least you'd know to check pump etc

[kachel 5]

Pump gives fuel, there is fuel at the injectors rail. How to measure the pulse at the injectors?

[petert 589]

With a multimter that can measures time in ms.

[petert 589]

At least one pin of each connector should have +12v when ignition is on. At least you can measure that with a cheapo multimeter. Other lead of meter can be earthed on body, ground etc.

Edited December 8, 2016 by petert

[dobboy 231 2 Cars]

You can buy a little LED tool that flashes to check electrical pulses, a multimeter might no react quick enough.

[kachel 5]

Thanks all for the info! I will check it. If the injectors are gone, could I use the 1.6 GTI injectors for the 1.9 DFZ XUJA1 engine?

[welshpug 1,661]

they will work but are quite a bit smaller so will provide less fuel.

 

9J1 use a bosch yellow 0 280 150 734, also found in volvos, they're a 200cc/min flow rate @3 bar.

 

9ja are closer and use 0 280 150 762, 214cc/min, found in 1.9 mi16's as well. (also found in some volvo applications)

 

 

XU5JA use 0280150211, 147cc/min.

 

 

 

however its more likely to be damaged wiring.

Edited December 9, 2016 by welshpug

[Tom Fenton 1,542]

Injectors can stick if left for a while. Give them a tap then pulse them with direct 12v on/off/on/off etc often will get them going. You can hear a click when they are working.

[kachel 5]

So I have removed the injectors and checked them directly with 12v. One is working fine after giving it a couple of taps. The click is very clear when giving it 12v. The other three aren't working well. I can hear a very soft click when giving it 12v but it seems that the needle is stuck. Is this repairable or should I find some other injectors?

[pug_ham 244 3 Cars]

Having them professionally cleaned / refurbished should fix them.

 

g

[kachel 5]

I put the 3 not working injectors in a Bath of brake cleaner last nicht. I tried again this evening in combination with a little tapping and yes! They came all loose! Should i use also another cleaner to clean the internal injector as the needle now is moving?