2003 zd30 fuel pump issues maybe

[dattorob]

I had an interesting problem similar to your description.
Engine light flashing on, restart was all good and then suddenly go doughy and light come on.
Long story short, check the physical condition of the MAF sensor. Mine had a pinhole in the membrane which stuffed up all the parameters. I found it when I squirted MAF sensor cleaner in every orifice except mine......
Sealed it with a dob of silastic and away she went.

There is no MAF sensor on the navara zd30 engine. its MAP only.

 

[dattorob]

i think i know what they where looking at. i can't remember exactly what its called (ICV%) but its to do with the duty cycle for the timing solenoid. there is a few write up on the patrol forums of this. as the pump wears the duty cycle changes changes, so it gives an idea of if the pump is worn out.
however that duty cycle also changes due to things like blocked filters, sucking in air etc. so its not always indicating a bad pump.

is that the spill valve duty cycle?

 

[tweak'e]

is that the spill valve duty cycle?

i can't remember if its spill valve or timing valve. i think its timing valve related as the ecu gets feed back from the injection pump timing sensor and adjusts from that. sorry i'm rather rusty it was many years ago now.