Pump Jet Valve Cyclinder #4 Failure

**minniemousey** · 28-03-2015, 10:43 PM

Van is shuddering it's way at low revs (1500-2000) to short destinations. Called into the local mechanic who plugged it into his computer and came up with "Pump Jet Valve Cylinder 4 - Electronic malfunction". He couldn't tell me what it was?! I gather from research that it may be something to do with the injectors - front and rear fuel filters and temperature sensor changed in most recent service due to failed sensor code. Any ideas on how much this costs to fix and what EXACTLY it means? Is it likely that a new ECU will cure it or is this the beginning of the end?

**Umai Naa!!** · 28-03-2015, 10:53 PM

Could be a dead injector, caused by a faulty wiring harness in the cylinder head.

**minniemousey** · 28-03-2015, 11:10 PM

Originally Posted by Umai Naa!!

Could be a dead injector, caused by a faulty wiring harness in the cylinder head.

Thanks. Any idea of a cost to do the above?

**Umai Naa!!** · 28-03-2015, 11:42 PM

I think the harness is a few hundred bucks.

But the job's a bit labour-intensive. Front of the van needs to come forward into the service position, among other things. Probably a good half a day's work in it.

**minniemousey** · 29-03-2015, 06:51 PM

Thanks for the reply. Off to the auto electrician/mechanic tomorrow.

**minniemousey** · 31-03-2015, 04:53 PM

Decided to go to a diesel specialist, injector #4 mechanical & electrical fault.... He has told us the injector will be $400 or $500 total could be $1000. Does this sound right?

**minniemousey** · 25-04-2015, 04:17 PM

Well... diesel specialist came back with $1000 just for the injector. Talked to another guy who said it may by the loom in the head. Turns out he was right. Glad i got a 3rd opinion, running like a dream again.

**Silver Caravelle** · 28-04-2015, 10:48 AM

Originally Posted by minniemousey

Well... diesel specialist came back with $1000 just for the injector. Talked to another guy who said it may by the loom in the head. Turns out he was right. Glad i got a 3rd opinion, running like a dream again.

Hi there, was it a costly job to replace the injector loom? I am assuming they had to remove the intake to pull the valve cover off.
I have had a lumpy running Multivan for quite some time, particuarly at around the 1400 rpm mark coupled with reasonance at about 1800rpm. No fault codes logged and no boost leaks. I am thinking possibly a loom issue or tappet.
Cheers, Scott

**minniemousey** · 22-05-2015, 10:30 PM

Originally Posted by Silver Caravelle

Hi there, was it a costly job to replace the injector loom? I am assuming they had to remove the intake to pull the valve cover off.
I have had a lumpy running Multivan for quite some time, particuarly at around the 1400 rpm mark coupled with reasonance at about 1800rpm. No fault codes logged and no boost leaks. I am thinking possibly a loom issue or tappet.
Cheers, Scott

Hi There, it was about $1200. The loom was about $3-400 the rest labour.