ZD30 "miss"

[Bogmeister]

Our 2005 zd30 has developed an intermittant hic up. Sometimes at highway speeds it will run fine, but after slowing down or idling for a traffic light it farts. It feels like the motor cuts out for a fraction of a second. I have cleaned the tank out, changed filters, run a fuel system cleaner thru it, poked it with a stick and spat at it. I also cleaned the electrical connections to the pump, cleaned all the earths on the motor and body. It all started with $20 worth of fuel from an unknown quality servo in the bush but the fact that it started farting 60km after filling up there may be a coincidence. Any ideas?

 

[nakedape]

Just for peace of mind - check that there is not air getting into the fuel system somewhere. There's plenty written on the subject - do a search. But in short, you'll need to check that the primer 'pumps up' after only a couple of shots. Alternatively, run a clear fuel line on the outlet side of your filter (bubbles are bad).

 

[Bogmeister]

I tried that and got no bubbles

 

[Dave]

Could of damaged the pump or injectors.

Might need to put an insurance claim in.

 

[the_bluester]

What about the old neutral switch bogey? I never had that one come up so I can't comment on what it feels like in action.

 

[Dave]

Could always try it, but they usually dont do it at idle.

 

[Bogmeister]

I disconnected the NPS and that seemed to make it better for a few minutes but it soon farted again.

 

[tweak'e]

is the egr blanked off?
do you have a catch can fitted? if not check for oil in the intake, clean it out, disconnect breather and try it.

 

[Bogmeister]

Took it to diesel care in Toowoomba who have diagnosed and quoted $5600 for a reco injector pump. Is this common on zd30s? The more people I talk to seem to have had the same problem :-(

The egr is not blocked but the butterfly/manifold has been cleaned out and the PCV is a "free to air" system. (It blows out under the motor)

 

[tweak'e]

could well be injection pump. they don't like water or crap fuel going through.
however i would block egr off first. do the cheap stuff first.
check the turbo is ok and its not siezing.